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1

CAST  

NSDL National Science Digital Library

The Council for Agricultural Science and Technology (CAST) was formed in 1972 as a result of a meeting sponsored by the National Academy of Sciences' National Research Council. CAST's mission is to "assemble, interpret, and communicate credible science-based information regionally, nationally, and internationally to legislators, regulators, policymakers, the media, the private sector and the public." Visitors will find the Education tab near the top of the page to be particularly helpful for those who want to pursue agricultural careers or learn about agricultural education, such as 4-H or Future Farmers of America. The CAST Videos section has a number of PowerPoint presentations on current topics of importance in agriculture, such as "The Science and Regulation of Food from Genetically Engineered Animals," "Food Safety and Fresh Produce," and "Probiotics in Human Health." A number of the papers that accompany the PowerPoint presentations are available for free.

2

CAST  

NSDL National Science Digital Library

The Council for Agricultural Science and Technology (CAST) was formed in 1972 as a result of a meeting sponsored by the National Academy of Sciences' National Research Council. CAST's mission is to "assemble, interpret, and communicate credible science-based information regionally, nationally, and internationally to legislators, regulators, policymakers, the media, the private sector and the public." Visitors will find the Education tab near the top of the page to be particularly helpful for those who want to pursue agricultural careers or learn about agricultural education, such as 4-H or Future Farmers of America. The CAST Videos section has a number of PowerPoint presentations on current topics of importance in agriculture, such as "The Science and Regulation of Food from Genetically Engineered Animals," "Food Safety and Fresh Produce," and "Probiotics in Human Health." A number of the papers that accompany the PowerPoint presentations are available for free.

2012-02-03

3

Urinary casts  

MedlinePLUS

... casts; Casts in the urine; Fatty casts; Red blood cell casts; White blood cell casts ... dehydration, exercise, or (water pills) diuretic medicines. Red blood cell casts are a sign of bleeding into ...

4

Cast Away  

Microsoft Academic Search

To strand actor Tom hanks on a deserted island, Cast Away begins with a visceral plane crash sequence incorporating CG water & waves, live action & miniature photography and numerous subtle digital effects. Once on the island, Hanks surveys the landscape revealing his isolation. Combining live action photography filmed in a parking lot in Malibu with a completely CG created

2001-01-01

5

Casting methods  

DOEpatents

A casting device includes a covered crucible having a top opening and a bottom orifice, a lid covering the top opening, a stopper rod sealing the bottom orifice, and a reusable mold having at least one chamber, a top end of the chamber being open to and positioned below the bottom orifice and a vacuum tap into the chamber being below the top end of the chamber. A casting method includes charging a crucible with a solid material and covering the crucible, heating the crucible, melting the material, evacuating a chamber of a mold to less than 1 atm absolute through a vacuum tap into the chamber, draining the melted material into the evacuated chamber, solidifying the material in the chamber, and removing the solidified material from the chamber without damaging the chamber.

Marsden, Kenneth C.; Meyer, Mitchell K.; Grover, Blair K.; Fielding, Randall S.; Wolfensberger, Billy W.

2012-12-18

6

Clamshell Casting! Stefanie Wuhrer  

E-print Network

Clamshell Casting! By Stefanie Wuhrer A thesis submitted to the Faculty of Graduate Studies and Research acceptance of the thesis, Clamshell Casting! submitted by Stefanie Wuhrer Douglas Howe (Director is casting, where liquid is poured into a cast and the cast is removed once the liquid has hardened. We

Wuhrer, Stefanie

7

Casting materials  

SciTech Connect

A foam material comprises a liquid polymer and a liquid isocyanate which is mixed to make a solution that is poured, injected or otherwise deposited into a corresponding mold. A reaction from the mixture of the liquid polymer and liquid isocyanate inside the mold forms a thermally collapsible foam structure having a shape that corresponds to the inside surface configuration of the mold and a skin that is continuous and unbroken. Once the reaction is complete, the foam pattern is removed from the mold and may be used as a pattern in any number of conventional casting processes.

Chaudhry, Anil R. (Xenia, OH); Dzugan, Robert (Cincinnati, OH); Harrington, Richard M. (Cincinnati, OH); Neece, Faurice D. (Lyndurst, OH); Singh, Nipendra P. (Pepper Pike, OH)

2011-06-14

8

Cool Cast Facts  

MedlinePLUS

... Get Placed? First, the doctor or cast technician — tech for short (or another person who is trained ... some water on it. The doctor or cast tech wraps the plaster or fiberglass around the soft ...

9

LLNL casting technology  

NASA Astrophysics Data System (ADS)

Competition to produce cast parts of higher quality, lower rejection rate, and lower cost is a fundamental factor in the global economy. To gain an edge on foreign competitors, the US casting industry must cut manufacturing costs and reduce the time from design to market. Casting research and development (R&D) are the key to increasing US competiveness in the casting arena. Lawrence Livermore National Laboratory (LLNL) is the home of a wide range of R&D projects that push the boundaries of state-of-the art casting. LLNL casting expertise and technology include: casting modeling research and development, including numerical simulation of fluid flow, heat transfer, reaction/solidification kinetics, and part distortion with residual stresses; special facilities to cast toxic material; extensive experience casting metals and nonmetals; advanced measurement and instrumentation systems. Department of Energy (DOE) funding provides the leverage for LLNL to collaborate with industrial partners to share this advanced casting expertise and technology. At the same time, collaboration with industrial partners provides LLNL technologists with broader insights into casting industry issues, casting process data, and the collective experience of industry experts. Casting R&D is also an excellent example of dual-use technology; it is the cornerstone for increasing US industrial competitiveness and minimizing waste nuclear material in weapon component production. Annual funding for casting projects at LLNL is $10M, which represents 1% of the total LLNL budget. Metal casting accounts for about 80% of the funding. Funding is nearly equally divided between development directed toward US industrial competitiveness and weapon component casting.

Shapiro, A. B.; Comfort, W. J., III

1994-01-01

10

LLNL casting technology  

SciTech Connect

Competition to produce cast parts of higher quality, lower rejection rate, and lower cost is a fundamental factor in the global economy. To gain an edge on foreign competitors, the US casting industry must cut manufacturing costs and reduce the time from design to market. Casting research and development (R&D) are the key to increasing US compentiveness in the casting arena. Lawrence Livermore National Laboratory (LLNL) is the home of a wide range of R&D projects that push the boundaries of state-of-the art casting. LLNL casting expertise and technology include: casting modeling research and development, including numerical simulation of fluid flow, heat transfer, reaction/solidification kinetics, and part distortion with residual stresses; special facilities to cast toxic material; extensive experience casting metals and nonmetals; advanced measurement and instrumentation systems. Department of Energy (DOE) funding provides the leverage for LLNL to collaborate with industrial partners to share this advanced casting expertise and technology. At the same time, collaboration with industrial partners provides LLNL technologists with broader insights into casting industry issues, casting process data, and the collective, experience of industry experts. Casting R&D is also an excellent example of dual-use technology; it is the cornerstone for increasing US industrial competitiveness and minimizing waste nuclear material in weapon component production. Annual funding for casting projects at LLNL is $10M, which represents 1% of the total LLNL budget. Metal casting accounts for about 80% of the funding. Funding is nearly equally divided between development directed toward US industrial competitiveness and weapon component casting.

Shapiro, A.B.; Comfort, W.J. III [eds.

1994-01-01

11

Casting and Molding  

NSDL National Science Digital Library

This activity was designed for blind learners, but all types of learners can explore the process used to cast and mold molten metal, glass, and plastics. Using gelatin, the learner will work with a variety of molds to create castings. When the shapes are unmolded, the learner can tactually explore the casts.

Perkins School for the Blind

2012-06-26

12

Cast aluminized explosives (review)  

Microsoft Academic Search

This paper reviews the current status and future trends of aluminized explosives. The major focus is on cast compositions,\\u000a which encompass both the melt-cast trinitrotoluene (TNT) based and the slurry cast polymer-based compositions. Widely reported\\u000a RDX and HMX based aluminized compositions with TNT used as a binder are discussed in detail. Various researchers have suggested\\u000a a 15–20% Al content as

P. P. Vadhe; R. B. Pawar; R. K. Sinha; S. N. Asthana; A. Subhananda Rao

2008-01-01

13

Hickey, W8206, all casts Hickey, W8206, all casts, page 1  

E-print Network

Hickey, W8206, all casts Hickey, W8206, all casts, page 1 #12;Hickey, W8206, all casts Hickey, W8206, all casts, page 2 #12;Hickey, W8206, all casts Hickey, W8206, all casts, page 3 #12;Hickey, W8206, all casts Hickey, W8206, all casts, page 4 #12;Hickey, W8206, all casts Hickey, W8206, all casts, page

Hickey, Barbara

14

Clean Metal Casting  

SciTech Connect

The objective of this project is to develop a technology for clean metal processing that is capable of consistently providing a metal cleanliness level that is fit for a given application. The program has five tasks: Development of melt cleanliness assessment technology, development of melt contamination avoidance technology, development of high temperature phase separation technology, establishment of a correlation between the level of melt cleanliness and as cast mechanical properties, and transfer of technology to the industrial sector. Within the context of the first task, WPI has developed a standardized Reduced Pressure Test that has been endorsed by AFS as a recommended practice. In addition, within the context of task1, WPI has developed a melt cleanliness sensor based on the principles of electromagnetic separation. An industrial partner is commercializing the sensor. Within the context of the second task, WPI has developed environmentally friendly fluxes that do not contain fluorine. Within the context of the third task, WPI modeled the process of rotary degassing and verified the model predictions with experimental data. This model may be used to optimize the performance of industrial rotary degassers. Within the context of the fourth task, WPI has correlated the level of melt cleanliness at various foundries, including a sand casting foundry, a permanent mold casting foundry, and a die casting foundry, to the casting process and the resultant mechanical properties. This is useful in tailoring the melt cleansing operations at foundries to the particular casting process and the desired properties of cast components.

Makhlouf M. Makhlouf; Diran Apelian

2002-02-05

15

Mechanisms of stabilization of earthworm casts and artificial casts  

Microsoft Academic Search

Fresh casts were collected from the earthworm species Aporrectodea caliginosa, and artificial casts were also made. The casts were subjected to ageing, drying-rewetting, and sterilization by hexanol vapour. Clay dispersion was determined, as a measure of the lack of stability of the casts. Two soils were used, the topsoil of a recently reclaimed polder soil in the Netherlands and the

J. C. Y. Marinissen; A. R. Dexter

1990-01-01

16

Method of casting aerogels  

DOEpatents

The invention describes a method for making monolithic castings of transparent silica aerogel with densities in the range from 0.001 g/cm[sup 3] to 0.6 g/cm[sup 3]. Various shapes of aerogels are cast in flexible polymer molds which facilitate removal and eliminate irregular surfaces. Mold dimensions are preselected to account for shrinkage of aerogel which occurs during the drying step of supercritical extraction of solvent. 2 figures.

Poco, J.F.

1993-09-07

17

Method of casting aerogels  

DOEpatents

The invention describes a method for making monolithic castings of transparent silica aerogel with densities in the range from 0.001 g/cm.sup.3 to 0.6 g/cm.sup.3. Various shapes of aerogels are cast in flexible polymer molds which facilitate removal and eliminate irregular surfaces. Mold dimensions are preselected to account for shrinkage of alcogel which occurs during the drying step of supercritical extraction of solvent.

Poco, John F. (Livermore, CA)

1993-01-01

18

A Winning Cast  

NASA Technical Reports Server (NTRS)

Howmet Research Corporation was the first to commercialize an innovative cast metal technology developed at Auburn University, Auburn, Alabama. With funding assistance from NASA's Marshall Space Flight Center, Auburn University's Solidification Design Center (a NASA Commercial Space Center), developed accurate nickel-based superalloy data for casting molten metals. Through a contract agreement, Howmet used the data to develop computer model predictions of molten metals and molding materials in cast metal manufacturing. Howmet Metal Mold (HMM), part of Howmet Corporation Specialty Products, of Whitehall, Michigan, utilizes metal molds to manufacture net shape castings in various alloys and amorphous metal (metallic glass). By implementing the thermophysical property data from by Auburn researchers, Howmet employs its newly developed computer model predictions to offer customers high-quality, low-cost, products with significantly improved mechanical properties. Components fabricated with this new process replace components originally made from forgings or billet. Compared with products manufactured through traditional casting methods, Howmet's computer-modeled castings come out on top.

2001-01-01

19

Salvaged castings and methods of salvaging castings with defective cast cooling bumps  

DOEpatents

Castings for gas turbine parts exposed on one side to a high-temperature fluid medium have cast-in bumps on an opposite cooling surface side to enhance heat transfer. Areas on the cooling surface having defectively cast bumps, i.e., missing or partially formed bumps during casting, are coated with a braze alloy and cooling enhancement material to salvage the part.

Johnson, Robert Alan (Simpsonville, SC); Schaeffer, Jon Conrad (Greenville, SC); Lee, Ching-Pang (Cincinnati, OH); Abuaf, Nesim (Lincoln City, OR); Hasz, Wayne Charles (Pownal, VT)

2002-01-01

20

CAST FLOOR WITH VIEW OF TORPEDO LADLE (BENEATH CAST FLOOR) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

CAST FLOOR WITH VIEW OF TORPEDO LADLE (BENEATH CAST FLOOR) AND KEEPERS OF THE CAST HOUSE FLOOR, S.L. KIMBROUGH AND DAVID HOLMES. - U.S. Steel, Fairfield Works, Blast Furnace No. 8, North of Valley Road, West of Ensley-Pleasant Grove Road, Fairfield, Jefferson County, AL

21

Hickey, C8206_all casts Hickey, C8206_all casts, page 1  

E-print Network

Hickey, C8206_all casts Hickey, C8206_all casts, page 1 #12;Hickey, C8206_all casts Hickey, C8206_all casts, page 2 #12;Hickey, C8206_all casts Hickey, C8206_all casts, page 3 #12;Hickey, C8206_all casts Hickey, C8206_all casts, page 4 #12;Hickey, C8206_all casts Hickey, C8206_all casts, page 5 #12

Hickey, Barbara

22

Rapid casting solutions: a review  

Microsoft Academic Search

Purpose – This paper seeks to review the industrial applications of state-of-the-art additive manufacturing (AM) techniques in metal casting technology. An extensive survey of concepts, techniques, approaches and suitability of various commercialised rapid casting (RC) solutions with traditional casting methods is presented. Design\\/methodology\\/approach – The tooling required for producing metal casting such as fabrication of patterns, cores and moulds with

Munish Chhabra; Rupinder Singh

2011-01-01

23

Ohno continuous casting  

Microsoft Academic Search

Production of net-shape products directly from the liquid is an attractive manufacturing route for alloys that are difficult to process or that cannot be rolled, drawn, or extruded. Developed at the Chiba Institute of Technology in Japan, the Ohno Continuous Casting (OCC) approach not only provides significant cost savings, but also has the potential to create new products. OCC process

H. Soda; A. McLean; G. Motoyasu; A. Ohno

1995-01-01

24

Extrusion cast explosive  

DOEpatents

Improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst are disclosed. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants.

Scribner, Kenneth J. (Livermore, CA)

1985-01-01

25

Casting and Angling.  

ERIC Educational Resources Information Center

As part of a series of books and pamphlets on outdoor education, this manual consists of easy-to-follow instructions for fishing activities dealing with casting and angling. The manual may be used as a part of the regular physical education program in schools and colleges or as a club activity for the accomplished weekend fisherman or the…

Smith, Julian W.

26

Mix/Cast Contamination Control  

NASA Technical Reports Server (NTRS)

Presented is a training handbook for Mix/Cast Contamination Control; a part of a series of training courses to qualify access to Mix/Cast facilities. Contents: List Contamination Control Requirements; Identify foreign objects debris (FOD), Control Areas and their guidelines; Describe environmental monitoring; List Contamination Control Initiatives; Describe concern for Controlled Materials; Identify FOD Controlled Areas in Mix/Cast.

Wallentine, M.

2005-01-01

27

Precision cast vs. wrought superalloys  

NASA Technical Reports Server (NTRS)

While cast polycrystalline superalloys recommend themselves in virtue of better 'buy-to-fly' ratios and higher strengthening gamma-prime volume fractions than those of wrought superalloys, the expansion of their use into such critical superalloy applications as gas turbine hot section components has been slowed by insufficient casting process opportunities for microstructural control. Attention is presently drawn, however, to casting process developments facilitating the production of defect-tolerant superalloy castings having improved fracture reliability. Integrally bladed turbine wheel and thin-walled turbine exhaust case near-net-shape castings have been produced by these means.

Tien, J. K.; Borofka, J. C.; Casey, M. E.

1986-01-01

28

Hickey, TT162, Casts 2-5 Hickey, TT162, Casts 2-5, page 1  

E-print Network

Hickey, TT162, Casts 2-5 Hickey, TT162, Casts 2-5, page 1 CTD002 #12;Hickey, TT162, Casts 2-5 Hickey, TT162, Casts 2-5, page 2 CTD002 #12;Hickey, TT162, Casts 2-5 Hickey, TT162, Casts 2-5, page 3 CTD002 #12;Hickey, TT162, Casts 2-5 Hickey, TT162, Casts 2-5, page 4 CTD002 #12;Hickey, TT162, Casts 2

Hickey, Barbara

29

Hickey, TT162, casts 6-7 Hickey, TT162, casts 6-7, page 1  

E-print Network

CTD006 Hickey, TT162, casts 6-7 Hickey, TT162, casts 6-7, page 1 #12;CTD006 Hickey, TT162, casts 6-7 Hickey, TT162, casts 6-7, page 2 #12;CTD006 Hickey, TT162, casts 6-7 Hickey, TT162, casts 6-7, page 3 #12;CTD006 Hickey, TT162, casts 6-7 Hickey, TT162, casts 6-7, page 4 #12;CTD006 Hickey, TT162, casts 6

Hickey, Barbara

30

Hickey, TT136, casts 3-5 Hickey, TT136, casts 3-5, page 1  

E-print Network

Hickey, TT136, casts 3-5 Hickey, TT136, casts 3-5, page 1 CTD003 #12;Hickey, TT136, casts 3-5 Hickey, TT136, casts 3-5, page 2 CTD003 #12;Hickey, TT136, casts 3-5 Hickey, TT136, casts 3-5, page 3 CTD003 #12;Hickey, TT136, casts 3-5 Hickey, TT136, casts 3-5, page 4 CTD003 #12;Hickey, TT136, casts 3

Hickey, Barbara

31

Hickey, TT136, casts 6-10 Hickey, TT136, casts 6-10, page 1  

E-print Network

Hickey, TT136, casts 6-10 Hickey, TT136, casts 6-10, page 1 CTD006 #12;Hickey, TT136, casts 6-10 Hickey, TT136, casts 6-10, page 2 CTD006 #12;Hickey, TT136, casts 6-10 Hickey, TT136, casts 6-10, page 3 CTD006 #12;Hickey, TT136, casts 6-10 Hickey, TT136, casts 6-10, page 4 CTD006 #12;Hickey, TT136, casts

Hickey, Barbara

32

Melting and casting of FeAl-based cast alloy  

SciTech Connect

The FeAl-based intermetallic alloys are of great interest because of their low density, low raw material cost, and excellent resistance to high-temperature oxidation, sulfidation, carburization, and molten salts. The applications based on these unique properties of FeAl require methods to melt and cast these alloys into complex-shaped castings and centrifugal cast tubes. This paper addresses the melting-related issues and the effect of chemistry on the microstructure and hardness of castings. It is concluded that the use of the Exo-Melt{trademark} process for melting and the proper selection of the aluminum melt stock can result in porosity-free castings. The FeAl alloys can be melted and cast from the virgin and revert stock. A large variation in carbon content of the alloys is possible before the precipitation of graphite flakes occurs. Titanium is a very potent addition to refine the grain size of castings. A range of complex sand castings and two different sizes of centrifugal cast tubes of the alloy have already been cast.

Sikka, V.K. [Oak Ridge National Lab., TN (United States); Wilkening, D. [Columbia Falls Aluminum Co., Columbia Falls, MT (United States); Liebetrau, J.; Mackey, B. [AFFCO, L.L.C., Anaconda, MT (United States)

1998-11-01

33

USGS CoreCast  

NSDL National Science Digital Library

Just about everyone seems to be creating a podcast these days, and a number of government agencies have entered the fray as of late. The United States Geological Survey recently decided to hang out their own podcast shingle, and the results of their labors can be explored here. The site states that their "CoreCast" is "natural science from the inside out", which seems like an appropriate label. The podcasts range in length from two to fifteen minutes, and they cover topics such as polar bear research, sex-changing fish, and climate change. One podcast that shouldn't be overlooked is "This Episode of CoreCast is Highly Questionable". In a mere three minutes, host Scott Horvath responds to a number of questions in an engaging fashion. After listening to an episode or two, visitors will probably want to sign up to receive email updates about new episodes.

34

Volume MLS ray casting.  

PubMed

The method of Moving Least Squares (MLS) is a popular framework for reconstructing continuous functions from scattered data due to its rich mathematical properties and well-understood theoretical foundations. This paper applies MLS to volume rendering, providing a unified mathematical framework for ray casting of scalar data stored over regular as well as irregular grids. We use the MLS reconstruction to render smooth isosurfaces and to compute accurate derivatives for high-quality shading effects. We also present a novel, adaptive preintegration scheme to improve the efficiency of the ray casting algorithm by reducing the overall number of function evaluations, and an efficient implementation of our framework exploiting modern graphics hardware. The resulting system enables high-quality volume integration and shaded isosurface rendering for regular and irregular volume data. PMID:18988986

Ledergerber, Christian; Guennebaud, Gaël; Meyer, Miriah; Bächer, Moritz; Pfister, Hanspeter

2008-01-01

35

Extrusion cast explosive  

DOEpatents

Improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst are disclosed. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants. 1 fig.

Scribner, K.J.

1985-01-29

36

Extrusion cast explosive  

DOEpatents

Disclosed is an improved, multiphase, high performance, high energy, extrusion cast explosive compositions, comprising, a crystalline explosive material; an energetic liquid plasticizer; a urethane prepolymer, comprising a blend of polyvinyl formal, and polycaprolactone; a polyfunctional isocyanate; and a catalyst. These new explosive compositions exhibit higher explosive content, a smooth detonation front, excellent stability over long periods of storage, and lower sensitivity to mechanical stimulants. 1 fig.

Scribner, K.J.

1985-11-26

37

Hickey, TT162, Casts 73-82 Hickey, TT162, Casts 73-82, page 1  

E-print Network

Hickey, TT162, Casts 73-82 Hickey, TT162, Casts 73-82, page 1 CTD073 #12;Hickey, TT162, Casts 73-82 Hickey, TT162, Casts 73-82, page 2 CTD073 #12;Hickey, TT162, Casts 73-82 Hickey, TT162, Casts 73-82, page 3 CTD073 #12;Hickey, TT162, Casts 73-82 Hickey, TT162, Casts 73-82, page 4 CTD074 #12;Hickey, TT162

Hickey, Barbara

38

Hickey, TT162, Casts 48-49 Hickey, TT162, Casts 48-49, page 1  

E-print Network

Hickey, TT162, Casts 48-49 Hickey, TT162, Casts 48-49, page 1 CTD048 #12;Hickey, TT162, Casts 48-49 Hickey, TT162, Casts 48-49, page 2 CTD048 #12;Hickey, TT162, Casts 48-49 Hickey, TT162, Casts 48-49, page 3 CTD048 #12;Hickey, TT162, Casts 48-49 Hickey, TT162, Casts 48-49, page 4 CTD048 #12;Hickey, TT162

Hickey, Barbara

39

Hickey, TT162, Casts 38-47 Hickey, TT162, Casts 38-47, page 1  

E-print Network

Hickey, TT162, Casts 38-47 Hickey, TT162, Casts 38-47, page 1 CTD038 #12;Hickey, TT162, Casts 38-47 Hickey, TT162, Casts 38-47, page 2 CTD039 #12;Hickey, TT162, Casts 38-47 Hickey, TT162, Casts 38-47, page 3 CTD039 #12;Hickey, TT162, Casts 38-47 Hickey, TT162, Casts 38-47, page 4 CTD040 #12;Hickey, TT162

Hickey, Barbara

40

Hickey, TT162, Casts 63-72 Hickey, TT162, Casts 63-72, page 1  

E-print Network

Hickey, TT162, Casts 63-72 Hickey, TT162, Casts 63-72, page 1 CTD063 #12;Hickey, TT162, Casts 63-72 Hickey, TT162, Casts 63-72, page 2 CTD063 #12;Hickey, TT162, Casts 63-72 Hickey, TT162, Casts 63-72, page 3 CTD063 #12;Hickey, TT162, Casts 63-72 Hickey, TT162, Casts 63-72, page 4 CTD064 #12;Hickey, TT162

Hickey, Barbara

41

Hickey, TT136, casts 46-47 Hickey, TT136, casts 46-47, page 1  

E-print Network

Hickey, TT136, casts 46-47 Hickey, TT136, casts 46-47, page 1 CTD046 #12;Hickey, TT136, casts 46-47 Hickey, TT136, casts 46-47, page 2 CTD046 #12;Hickey, TT136, casts 46-47 Hickey, TT136, casts 46-47, page 3 CTD046 #12;Hickey, TT136, casts 46-47 Hickey, TT136, casts 46-47, page 4 CTD046 #12;Hickey, TT136

Hickey, Barbara

42

Hickey, W8201, casts 26-32 Hickey, W8201, casts 26-32, page 1  

E-print Network

Hickey, W8201, casts 26-32 Hickey, W8201, casts 26-32, page 1 CTD026 #12;Hickey, W8201, casts 26-32 Hickey, W8201, casts 26-32, page 2 CTD026 #12;Hickey, W8201, casts 26-32 Hickey, W8201, casts 26-32, page 3 CTD027 #12;Hickey, W8201, casts 26-32 Hickey, W8201, casts 26-32, page 4 CTD027 #12;Hickey, W8201

Hickey, Barbara

43

Hickey, TT136, casts 52-55 Hickey, TT136, casts 52-55, pager 1  

E-print Network

Hickey, TT136, casts 52-55 Hickey, TT136, casts 52-55, pager 1 CTD052 #12;Hickey, TT136, casts 52-55 Hickey, TT136, casts 52-55, pager 2 CTD052 #12;Hickey, TT136, casts 52-55 Hickey, TT136, casts 52-55, pager 3 CTD052 #12;Hickey, TT136, casts 52-55 Hickey, TT136, casts 52-55, pager 4 CTD052 #12;Hickey, TT

Hickey, Barbara

44

Hickey, TT136, casts 91-95 Hickey, TT136, casts 91-95, page 1  

E-print Network

Hickey, TT136, casts 91-95 Hickey, TT136, casts 91-95, page 1 CTD091 #12;Hickey, TT136, casts 91-95 Hickey, TT136, casts 91-95, page 2 CTD091 #12;Hickey, TT136, casts 91-95 Hickey, TT136, casts 91-95, page 3 CTD091 #12;Hickey, TT136, casts 91-95 Hickey, TT136, casts 91-95, page 4 CTD091 #12;Hickey, TT136

Hickey, Barbara

45

Hickey, W8201, casts 11-18 Hickey, W8201, casts 11-18, page 1  

E-print Network

Hickey, W8201, casts 11-18 Hickey, W8201, casts 11-18, page 1 CTD011 #12;Hickey, W8201, casts 11-18 Hickey, W8201, casts 11-18, page 2 CTD011 #12;Hickey, W8201, casts 11-18 Hickey, W8201, casts 11-18, page 3 CTD011 #12;Hickey, W8201, casts 11-18 Hickey, W8201, casts 11-18, page 4 CTD011 #12;Hickey, W8201

Hickey, Barbara

46

Hickey, TT162, Casts 83-87 Hickey, TT162, Casts 83-87, page 1  

E-print Network

Hickey, TT162, Casts 83-87 Hickey, TT162, Casts 83-87, page 1 CTD083 #12;Hickey, TT162, Casts 83-87 Hickey, TT162, Casts 83-87, page 2 CTD083 #12;Hickey, TT162, Casts 83-87 Hickey, TT162, Casts 83-87, page 3 CTD083 #12;Hickey, TT162, Casts 83-87 Hickey, TT162, Casts 83-87, page 4 CTD083 #12;Hickey, TT162

Hickey, Barbara

47

Hickey, TT136, casts 96-97 Hickey, TT136, casts 96-97, page 1  

E-print Network

Hickey, TT136, casts 96-97 Hickey, TT136, casts 96-97, page 1 CTD096 #12;Hickey, TT136, casts 96-97 Hickey, TT136, casts 96-97, page 2 CTD096 #12;Hickey, TT136, casts 96-97 Hickey, TT136, casts 96-97, page 3 CTD096 #12;Hickey, TT136, casts 96-97 Hickey, TT136, casts 96-97, page 4 CTD096 #12;Hickey, TT136

Hickey, Barbara

48

Hickey, TT136, casts 56-76 Hickey, TT136, casts 56-76, page 1  

E-print Network

Hickey, TT136, casts 56-76 Hickey, TT136, casts 56-76, page 1 CTD056 #12;Hickey, TT136, casts 56-76 Hickey, TT136, casts 56-76, page 2 CTD056 #12;Hickey, TT136, casts 56-76 Hickey, TT136, casts 56-76, page 3 CTD056 #12;Hickey, TT136, casts 56-76 Hickey, TT136, casts 56-76, page 4 CTD056 #12;Hickey, TT136

Hickey, Barbara

49

Hickey, TT136, casts 48, 49, 51 Hickey, TT136, casts 48, 49, 51, page 1  

E-print Network

Hickey, TT136, casts 48, 49, 51 Hickey, TT136, casts 48, 49, 51, page 1 CTD048 #12;Hickey, TT136, casts 48, 49, 51 Hickey, TT136, casts 48, 49, 51, page 2 CTD048 #12;Hickey, TT136, casts 48, 49, 51 Hickey, TT136, casts 48, 49, 51, page 3 CTD048 #12;Hickey, TT136, casts 48, 49, 51 Hickey, TT136, casts

Hickey, Barbara

50

Hickey, TT136, casts 11-20 Hickey, TT136, casts 11-20, page 1  

E-print Network

Hickey, TT136, casts 11-20 Hickey, TT136, casts 11-20, page 1 CTD011 #12;Hickey, TT136, casts 11-20 Hickey, TT136, casts 11-20, page 2 CTD011 #12;Hickey, TT136, casts 11-20 Hickey, TT136, casts 11-20, page 3 CTD012 #12;Hickey, TT136, casts 11-20 Hickey, TT136, casts 11-20, page 4 CTD013 #12;Hickey, TT136

Hickey, Barbara

51

Hickey, TT136, casts 27-36 Hickey, TT136, casts 27-36, page 1  

E-print Network

Hickey, TT136, casts 27-36 Hickey, TT136, casts 27-36, page 1 CTD027 #12;Hickey, TT136, casts 27-36 Hickey, TT136, casts 27-36, page 2 CTD027 #12;Hickey, TT136, casts 27-36 Hickey, TT136, casts 27-36, page 3 CTD027 #12;Hickey, TT136, casts 27-36 Hickey, TT136, casts 27-36, page 4 CTD027 #12;Hickey, TT136

Hickey, Barbara

52

Hickey, TT136, casts 21-26 Hickey, TT136, casts 21-26, page 1  

E-print Network

Hickey, TT136, casts 21-26 Hickey, TT136, casts 21-26, page 1 CTD021 #12;Hickey, TT136, casts 21-26 Hickey, TT136, casts 21-26, page 2 CTD021 #12;Hickey, TT136, casts 21-26 Hickey, TT136, casts 21-26, page 3 CTD021 #12;Hickey, TT136, casts 21-26 Hickey, TT136, casts 21-26, page 4 CTD021 #12;Hickey, TT136

Hickey, Barbara

53

Hickey, W8201, Casts 1-10 Hickey, W8201, Casts 1-10, page 1  

E-print Network

CTD001 Hickey, W8201, Casts 1-10 Hickey, W8201, Casts 1-10, page 1 #12;CTD001 Hickey, W8201, Casts 1-10 Hickey, W8201, Casts 1-10, page 2 #12;CTD002 Hickey, W8201, Casts 1-10 Hickey, W8201, Casts 1-10, page 3 #12;CTD002 Hickey, W8201, Casts 1-10 Hickey, W8201, Casts 1-10, page 4 #12;CTD003 Hickey, W8201

Hickey, Barbara

54

Hickey, TT136, casts 98-99 Hickey, TT136, casts 98-99, page 1  

E-print Network

Hickey, TT136, casts 98-99 Hickey, TT136, casts 98-99, page 1 CTD098 #12;Hickey, TT136, casts 98-99 Hickey, TT136, casts 98-99, page 2 CTD098 #12;Hickey, TT136, casts 98-99 Hickey, TT136, casts 98-99, page 3 CTD098 #12;Hickey, TT136, casts 98-99 Hickey, TT136, casts 98-99, page 4 CTD098 #12;Hickey, TT136

Hickey, Barbara

55

Hickey, TT162, Casts 56-62 Hickey, TT162, Casts 56-62, page 1  

E-print Network

Hickey, TT162, Casts 56-62 Hickey, TT162, Casts 56-62, page 1 CTD056 #12;Hickey, TT162, Casts 56-62 Hickey, TT162, Casts 56-62, page 2 CTD056 #12;Hickey, TT162, Casts 56-62 Hickey, TT162, Casts 56-62, page 3 CTD056 #12;Hickey, TT162, Casts 56-62 Hickey, TT162, Casts 56-62, page 4 CTD056 #12;Hickey, TT162

Hickey, Barbara

56

Hickey, TT136, casts 41-43 Hickey, TT136, casts 41-43, page 1  

E-print Network

CTD041 Hickey, TT136, casts 41-43 Hickey, TT136, casts 41-43, page 1 #12;CTD041 Hickey, TT136, casts 41-43 Hickey, TT136, casts 41-43, page 2 #12;CTD041 Hickey, TT136, casts 41-43 Hickey, TT136, casts 41-43, page 3 #12;CTD041 Hickey, TT136, casts 41-43 Hickey, TT136, casts 41-43, page 4 #12;CTD041

Hickey, Barbara

57

Hickey, TT136, casts 37-40 Hickey, TT136, casts 37-40, page 1  

E-print Network

CTD037 Hickey, TT136, casts 37-40 Hickey, TT136, casts 37-40, page 1 #12;CTD037 Hickey, TT136, casts 37-40 Hickey, TT136, casts 37-40, page 2 #12;CTD037 Hickey, TT136, casts 37-40 Hickey, TT136, casts 37-40, page 3 #12;CTD037 Hickey, TT136, casts 37-40 Hickey, TT136, casts 37-40, page 4 #12;CTD037

Hickey, Barbara

58

Hickey, TT162, Casts 17-24 Hickey, TT162, Casts 17-24, page 1  

E-print Network

Hickey, TT162, Casts 17-24 Hickey, TT162, Casts 17-24, page 1 CTD017 #12;Hickey, TT162, Casts 17-24 Hickey, TT162, Casts 17-24, page 2 CTD017 #12;Hickey, TT162, Casts 17-24 Hickey, TT162, Casts 17-24, page 3 CTD018 #12;Hickey, TT162, Casts 17-24 Hickey, TT162, Casts 17-24, page 4 CTD018 #12;Hickey, TT162

Hickey, Barbara

59

Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 1  

E-print Network

Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 1 CTD088 #12;Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 2 CTD088 #12;Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 3 CTD088 #12;Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 4 CTD088 #12;Hickey, TT162

Hickey, Barbara

60

Hickey, TT136, casts 77-90 Hickey, TT136, casts 77-90, page 1  

E-print Network

Hickey, TT136, casts 77-90 Hickey, TT136, casts 77-90, page 1 CTD077 #12;Hickey, TT136, casts 77-90 Hickey, TT136, casts 77-90, page 2 CTD077 #12;Hickey, TT136, casts 77-90 Hickey, TT136, casts 77-90, page 3 CTD077 #12;Hickey, TT136, casts 77-90 Hickey, TT136, casts 77-90, page 4 CTD077 #12;Hickey, TT136

Hickey, Barbara

61

Hickey, TT136, casts 44-46 Hickey, TT136, casts 44-46, page 1  

E-print Network

Hickey, TT136, casts 44-46 Hickey, TT136, casts 44-46, page 1 CTD044 #12;Hickey, TT136, casts 44-46 Hickey, TT136, casts 44-46, page 2 CTD044 #12;Hickey, TT136, casts 44-46 Hickey, TT136, casts 44-46, page 3 CTD044 #12;Hickey, TT136, casts 44-46 Hickey, TT136, casts 44-46, page 4 CTD044 #12;Hickey, TT136

Hickey, Barbara

62

21 CFR 888.5940 - Cast component.  

Code of Federal Regulations, 2012 CFR

...8 2012-04-01 2012-04-01 false Cast component. 888.5940 Section 888.5940...ORTHOPEDIC DEVICES Surgical Devices § 888.5940 Cast component. (a) Identification. A cast component is a device intended for medical...

2012-04-01

63

21 CFR 888.5940 - Cast component.  

Code of Federal Regulations, 2011 CFR

...8 2011-04-01 2011-04-01 false Cast component. 888.5940 Section 888.5940...ORTHOPEDIC DEVICES Surgical Devices § 888.5940 Cast component. (a) Identification. A cast component is a device intended for medical...

2011-04-01

64

21 CFR 888.5940 - Cast component.  

Code of Federal Regulations, 2013 CFR

...8 2013-04-01 2013-04-01 false Cast component. 888.5940 Section 888.5940...ORTHOPEDIC DEVICES Surgical Devices § 888.5940 Cast component. (a) Identification. A cast component is a device intended for medical...

2013-04-01

65

21 CFR 888.5940 - Cast component.  

...8 2014-04-01 2014-04-01 false Cast component. 888.5940 Section 888.5940...ORTHOPEDIC DEVICES Surgical Devices § 888.5940 Cast component. (a) Identification. A cast component is a device intended for medical...

2014-04-01

66

21 CFR 888.5940 - Cast component.  

Code of Federal Regulations, 2010 CFR

...8 2010-04-01 2010-04-01 false Cast component. 888.5940 Section 888.5940...ORTHOPEDIC DEVICES Surgical Devices § 888.5940 Cast component. (a) Identification. A cast component is a device intended for medical...

2010-04-01

67

Lost-Soap Aluminum Casting.  

ERIC Educational Resources Information Center

Lost-wax casting in sterling silver is a costly experience for the average high school student. However, this jewelry process can be learned at no cost if scrap aluminum is used instead of silver, and soap bars are used instead of wax. This lost-soap aluminum casting process is described. (Author/KC)

Mihalow, Paula

1980-01-01

68

Education and Caste in India  

ERIC Educational Resources Information Center

This paper analyses the policy of reservation for lower castes in India. This policy is similar to that of affirmative action in the United States. The paper provides a brief overview of the caste system and discusses the types of groups that are eligible for reservation, based on data from government reports. The stance of this paper is that…

Chauhan, Chandra Pal Singh

2008-01-01

69

Clogging in Continuous Casting Nozzles  

Microsoft Academic Search

Nozzle clogging is a serious productivity and qua lity problem in continuous casting. This work reviews the causes, effects, and solutions to cloggi ng in continuous casting nozzles. The results of a one-dimensional, steady state analysis of the heat loss from the molten steel stream through the nozzle wall are discussed. The analyses show that steel may freeze within the

K. G. Rackers; B. G. Thomas

70

Hickey -TT174, casts 1 to cast 11 Cruise cast lat (dd.mm.m) lon(dd.mm.m) Date/Time (MMDDYYHHMM) Total Scan  

E-print Network

Hickey -TT174, casts 1 to cast 11 Cruise cast lat (dd.mm.m) lon(dd.mm.m) Date/Time (MMDDYYHHMM;Hickey -TT174, casts 1 to cast 11 Cruise cast lat (dd.mm.m) lon(dd.mm.m) Date/Time (MMDDYYHHMM) Total -TT174, casts 1 to cast 11 Cruise cast lat (dd.mm.m) lon(dd.mm.m) Date/Time (MMDDYYHHMM) Total Scan

Hickey, Barbara

71

Strip casting apparatus and method  

DOEpatents

Strip casting apparatus including a molten-metal-holding container and a nozzle to deposit molten metal onto a moving chill drum to directly cast continuous metallic strip. The nozzle body includes a slot bounded between a back and a front lip. The slot width exceeds about 20 times the gap distance between the nozzle and the chill drum surface. Preferably, the slot width exceeds 0.5 inch. This method of strip casting minimizes pressure drop, insuring better metal-to-chill-drum contact which promotes heat transfer and results in a better quality metallic strip. 6 figs.

Williams, R.S.; Baker, D.F.

1988-09-20

72

Pre-Cast Gel Electrophoresis Guide  

E-print Network

Novex® Pre-Cast Gel Electrophoresis Guide Version B January 27, 2003 IM-1002 Novex® Pre-Cast Gel Electrophoresis Guide General information and protocols for using Novex® pre-cast gels www.invitrogen.com tech.....................................................................................................................1 Novex® Pre-Cast Gels

Kirschner, Marc W.

73

Hickey -TT136 casts 1-2 Hickey -TT136,Casts 1-2, page 1  

E-print Network

Hickey -TT136 casts 1-2 Hickey -TT136,Casts 1-2, page 1 CTD001 #12;Hickey -TT136 casts 1-2 Hickey -TT136,Casts 1-2, page 2 CTD001 #12;Hickey -TT136 casts 1-2 Hickey -TT136,Casts 1-2, page 3 CTD001 #12;Hickey -TT136 casts 1-2 Hickey -TT136,Casts 1-2, page 4 CTD001 #12;Hickey -TT136 casts 1-2 Hickey -TT136

Hickey, Barbara

74

Innovations in cast magnesium alloys  

Microsoft Academic Search

This article examines questions related to aspects of the production of castings of magnesium alloys in molds made by volumetric\\u000a stamping without the use of the corresponding tooling. Information is presented on features of the gating-feeding systems\\u000a used to obtain magnesium-alloy castings in molds made by volumetric stamping. Also examined are features of the effect of\\u000a small additions of calcium

V. D. Belov; A. V. Koltygin; N. A. Belov; I. V. Plisetskaya

2010-01-01

75

Fillability of Thin-Wall Steel Castings  

SciTech Connect

The use of steel components is being challenged by lighter nonferrous or cast iron components. The development of techniques for enhancing and ensuring the filability of thin-wall mold cavities is most critical for thinner wall cast steel production. The purpose of this research was to develop thin-wall casting techniques that can be used to reliably produce thin-wall castings from traditional gravity poured sand casting processes. The focus of the research was to enhance the filling behavior to prevent misrunds. Experiments were conducted to investigate the influence of various foundry variables on the filling of thin section steel castings. These variables include casting design, heat transfer, gating design, and metal fluidity. Wall thickness and pouring temperature have the greatest effect on casting fill. As wall thickness increases the volume to surface area of the casting increases, which increases the solidification time, allowing the metal to flow further in thicker sect ions. Pouring time is another significant variable affecting casting fill. Increases or decreases of 20% in the pouring time were found to have a significant effect on the filling of thin-wall production castings. Gating variables, including venting, pouring head height, and mold tilting also significantly affected thin-wall casting fill. Filters offer less turbulent, steadier flow, which is appropriate for thicker castings, but they do not enhance thin-wall casting fill.

Robert C. Voigt; Joseph Bertoletti; Andrew Kaley; Sandi Ricotta; Travis Sunday

2002-07-30

76

CTD019Hickey, W8201_casts 19-22 Hickey, W8201_casts 19-22, page 1  

E-print Network

CTD019Hickey, W8201_casts 19-22 Hickey, W8201_casts 19-22, page 1 #12;CTD019Hickey, W8201_casts 19-22 Hickey, W8201_casts 19-22, page 2 #12;CTD019Hickey, W8201_casts 19-22 Hickey, W8201_casts 19-22, page 3 #12;CTD019Hickey, W8201_casts 19-22 Hickey, W8201_casts 19-22, page 4 #12;CTD019Hickey, W8201_casts 19

Hickey, Barbara

77

CTD023Hickey, W8201_casts 23-25 Hickey, W8201_casts 23-25, page 1  

E-print Network

CTD023Hickey, W8201_casts 23-25 Hickey, W8201_casts 23-25, page 1 #12;CTD023Hickey, W8201_casts 23-25 Hickey, W8201_casts 23-25, page 2 #12;CTD023Hickey, W8201_casts 23-25 Hickey, W8201_casts 23-25, page 3 #12;CTD023Hickey, W8201_casts 23-25 Hickey, W8201_casts 23-25, page 4 #12;CTD023Hickey, W8201_casts 23

Hickey, Barbara

78

CTD021Hickey, W8101_casts 21-23 Hickey, W8101_casts 21-23, page 1  

E-print Network

CTD021Hickey, W8101_casts 21-23 Hickey, W8101_casts 21-23, page 1 #12;CTD021Hickey, W8101_casts 21-23 Hickey, W8101_casts 21-23, page 2 #12;CTD021Hickey, W8101_casts 21-23 Hickey, W8101_casts 21-23, page 3 #12;CTD021Hickey, W8101_casts 21-23 Hickey, W8101_casts 21-23, page 4 #12;CTD021Hickey, W8101_casts 21

Hickey, Barbara

79

Casting Castings: A Classroom Hands-on Activity  

NSDL National Science Digital Library

This learning activity will provide a useful technique for students to learn casting concepts. The class will be allowed a hands-on experience with casting. Students will make their own fishing sinkers. The lesson plan document includes step by step instructions for the lesson along with photographs.This activity would be appropriate for high school and college level students. The lesson should take about one hour of class time. This document will serve as a framework for instructors and may be downloaded in PDF format.

Johnson, Craig

2012-11-08

80

Blasting casting to raise productivity  

SciTech Connect

Normally, surface mines employ draglines or truck and shovel systems to remove overburden. Blasting merely fragments and displaces the overburden enough to allow for easy digging. But during the past two decades, the effect of inflation and increased labor costs have encouraged unconventional methods of overburden removal. All of us are aware of the tremendous inflationary effects on costs of equipment, fuel, labor, interest, insurance, environmental compliance, etc. This has allowed the authors to take a new look at the use of explosives as an effective alternate method of overburden removal. This technique is known by several names, but basically blast casting or just casting best describes it. Other terms in vogue are explosive casting, controlled trajectory blasting, trajectory control blasting, and whatever terminology comes to mind.

Pilshaw, S.R.

1987-07-01

81

CAST results and Axion review  

E-print Network

We present results from the CERN Axion Solar Telescope (CAST) and the Axion Dark Matter eXperiment (ADMX), together with a brief review on prospects on Axion searches with a variety of experimental techniques. CAST has explored masses up to 0.64 eV setting the most stringent limit on the axion-photon coupling, apart for the micro-eV region where ADMX is the most competitive experiment. CAST is aiming at surpassing the 1eV WMAP upper limit and possibly revisiting the operation in vacuum with extra sensitive X-ray detectors, while ADMX, using improved extra sensitive SQUID amplifiers will explore the micro-eV mass range.

T. Geralis; for the CAST collaboration

2009-05-26

82

Energy Consumption of Die Casting Operations  

SciTech Connect

Molten metal processing is inherently energy intensive and roughly 25% of the cost of die-cast products can be traced to some form of energy consumption [1]. The obvious major energy requirements are for melting and holding molten alloy in preparation for casting. The proper selection and maintenance of melting and holding equipment are clearly important factors in minimizing energy consumption in die-casting operations [2]. In addition to energy consumption, furnace selection also influences metal loss due to oxidation, metal quality, and maintenance requirements. Other important factors influencing energy consumption in a die-casting facility include geographic location, alloy(s) cast, starting form of alloy (solid or liquid), overall process flow, casting yield, scrap rate, cycle times, number of shifts per day, days of operation per month, type and size of die-casting form of alloy (solid or liquid), overall process flow, casting yield, scrap rate, cycle times, number of shifts per day, days of operation per month, type and size of die-casting machine, related equipment (robots, trim presses), and downstream processing (machining, plating, assembly, etc.). Each of these factors also may influence the casting quality and productivity of a die-casting enterprise. In a die-casting enterprise, decisions regarding these issues are made frequently and are based on a large number of factors. Therefore, it is not surprising that energy consumption can vary significantly from one die-casting enterprise to the next, and within a single enterprise as function of time.

Jerald Brevick; clark Mount-Campbell; Carroll Mobley

2004-03-15

83

Casting propellant in rocket engine  

NASA Technical Reports Server (NTRS)

A method is described for casting a solid propellant in the casing of a rocket engine having a continuous wall with a single opening which is formed by leaves of a material which melt at a temperature of the propellant and with curved edges concentric to the curvature of the spherical casing. The leaves are inserted into the spherical casing through the opening forming a core having a greater width than the width of the single opening and with curved peripheral edges. The cast propellant forms a solid mass and then heated to melt the leaves and provide a central opening with radial projecting flutes.

Roach, J. E.; Froehling, S. C. (inventors)

1976-01-01

84

Cast-a-Box: Casting Conditions and Macroporosity  

NSDL National Science Digital Library

An illustration of three-dimensional finite difference simulation of heat conduction with phase change and complex boundary conditions, this requires students to adjust boundary conditions to make the top surface of a regular hexahedral "casting" to freeze last, eliminating macroporosity.

Powell, Adam C., IV

2004-08-24

85

ATTEN ATTEN Hickey, W8101, casts 1-10  

E-print Network

ATTEN ATTEN Hickey, W8101, casts 1-10 Hickey, W8101, casts 1-10, page 1 #12;Hickey, W8101, casts 1-10 Hickey, W8101, casts 1-10, page 2 #12;Hickey, W8101, casts 1-10 Hickey, W8101, casts 1-10, page 3 #12;ATTEN ATTEN Hickey, W8101, casts 1-10 Hickey, W8101, casts 1-10, page 4 #12;ATTEN ATTEN Hickey, W8101

Hickey, Barbara

86

Biocompatibility of Dental Casting Alloys  

Microsoft Academic Search

Most cast dental restorations are made from alloys or commercially pure titanium (cpTi). Many orthodontic appliances are also fabricated from metallic materials. It has been documented in vitro and in vivo that metallic dental devices release metal ions, mainly due to corrosion. Those metallic components may be locally and systemically distributed and could play a role in the etiology of

Werner Geurtsen

2002-01-01

87

Scheduled Castes and Land Deprivation  

Microsoft Academic Search

The paper is more in the form of setting broad contours for a comprehensive buildup. It is divided into four sections. The first section discusses the landlessness or nearlandlessness of majority of Scheduled Caste households and the benefits of land assigned to them as a part of redistributive land reform strategy. The second section analyses the impact of redistributive land

D. Narasimha Reddy

88

Math: Objectives Guide. Project CAST.  

ERIC Educational Resources Information Center

The guide lists math objectives needed for independent living by secondary special education students. One of a series of Project CAST (Community and School Together) life skills manuals, the guide outlines basic competencies in terms of goal statements, behavioral objectives, and specialized vocabulary for the following areas: money, making…

Charles County Board of Education, La Plata, MD. Office of Special Education.

89

Homogenization heat treating cast microstructure  

NSDL National Science Digital Library

Cast microstructures have variations in composition on the length scale of dendrites and homogenization heat treatments are performed to smooth out these variations. This problem is an integral analysis of the 1D diffusion mass transfer in this problem. The results using two different assumed profiles are compared.

Krane, Matthew J. M.

2008-10-25

90

Overview of ToxCast?  

EPA Science Inventory

In 2007, EPA launched ToxCast? in order to develop a cost-effective approach for prioritizing the toxicity testing of large numbers of chemicals in a short period of time. Using data from state-of-the-art high throughput screening (HTS) bioassays developed in the pharmaceutical i...

91

Spray casting project final report  

Microsoft Academic Search

Lockheed Martin Energy Systems, Inc. (Energy Systems), along with other participating organizations, has been exploring the feasibility of spray casting depleted uranium (DU) to near-net shape as a waste minimization effort. Although this technology would be useful in a variety of applications where DU was the material of choice, this effort was aimed primarily at gamma-shielding components for use in

S. R. Churnetski; J. E. Thompson

1996-01-01

92

ENVIRONMENTAL ASSESSMENT OF IRON CASTING  

EPA Science Inventory

Sampling of ductile iron casting in green sand molds with phenolic isocyanate cores and in phenol-formaldehyde bound shell molds did not provide definitive proof that environmentally hazardous organic emission occur. Both molding systems produced the same type of major emissions,...

93

Electroslag casting of compressor crankshafts  

Microsoft Academic Search

Of all of the methods of production of crankshaft castings a method making it possible to melt sections of it with three molds was used. The essence of production of castinss of sections using the method selected is as follows. In one mold a crank is produced by remelting of a consumable electrode with obtaining of a crank (with axes)

A. P. Alikin; A. A. Dan'kin

1993-01-01

94

Molding A Cast Metals Program  

ERIC Educational Resources Information Center

The cast metals program, a two-year associate degree program, at Muskegon Community College, Musegon, Michigan operates in close cooperation with the local foundry industry to provide a background for entry-level technical jobs and for continued studies toward a four-year degree. (EA)

Trumble, Dale E.

1975-01-01

95

21 CFR 880.6185 - Cast cover.  

... 8 2014-04-01 2014-04-01 false Cast cover. 880.6185 Section 880.6185 Food...Personal Use Miscellaneous Devices § 880.6185 Cast cover. (a) Identification. A cast cover is a device intended for medical...

2014-04-01

96

21 CFR 880.6185 - Cast cover.  

Code of Federal Regulations, 2013 CFR

... 8 2013-04-01 2013-04-01 false Cast cover. 880.6185 Section 880.6185 Food...Personal Use Miscellaneous Devices § 880.6185 Cast cover. (a) Identification. A cast cover is a device intended for medical...

2013-04-01

97

21 CFR 880.6185 - Cast cover.  

Code of Federal Regulations, 2011 CFR

... 8 2011-04-01 2011-04-01 false Cast cover. 880.6185 Section 880.6185 Food...Personal Use Miscellaneous Devices § 880.6185 Cast cover. (a) Identification. A cast cover is a device intended for medical...

2011-04-01

98

A Microbiological Study of Earthworm Casts  

Microsoft Academic Search

SUMMARY Microbiological, physical and chemical changes were followed in worm casts ageing in the field. Filamentous fungi and yeasts increased in number rapidly after the cast was produced, but not bacteria or actinomycetes which were initially numerous. Measurements of hyphal length confirmed the increased growth of fungi. Ageing casts showed a declining respiratory activity, possibly because the bacteria formed resting

J. N. Parle

1963-01-01

99

Coping with type casts in C  

Microsoft Academic Search

The use of type casts is pervasive in C. Although casts provide great flexibility in writing programs, their use obscures the meaning of programs, and can present obstacles during maintenance. Casts involving pointers to structures (C structs) are particularly problematic, because by using them, a programmer can interpret any memory region to be of any desired type, thereby compromising C's

Michael Siffr; Satish Chandra; Thomas Ball; Krishna Kunchithapadam; Thomas W. Reps

1999-01-01

100

21 CFR 880.6185 - Cast cover.  

Code of Federal Regulations, 2012 CFR

... 8 2012-04-01 2012-04-01 false Cast cover. 880.6185 Section 880.6185 Food...Personal Use Miscellaneous Devices § 880.6185 Cast cover. (a) Identification. A cast cover is a device intended for medical...

2012-04-01

101

July/August 20056 Casting aluminum  

E-print Network

includes `continuous' casting of Al, whereby the solid is formed in the water- cooled casterJuly/August 20056 Bob Rapp Casting aluminum Lay people unfamiliar with metallurgical processing to cast Al commercially. Perhaps I can interest the reader with a summary of this important process. I

Colton, Jonathan S.

102

Hickey, W8009C, casts 992-995 Hickey, W8009C, casts 992-995, page 1  

E-print Network

Hickey, W8009C, casts 992-995 Hickey, W8009C, casts 992-995, page 1 #12;Hickey, W8009C, casts 992-995 Hickey, W8009C, casts 992-995, page 2 #12;Hickey, W8009C, casts 992-995 Hickey, W8009C, casts 992-995, page 3 #12;Hickey, W8009C, casts 992-995 Hickey, W8009C, casts 992-995, page 4 #12;Hickey, W8009C

Hickey, Barbara

103

Viscosity of casting fluxes used during continuous casting of steel  

Microsoft Academic Search

Molten flux viscosity of eighteen commercially available casting fluxes has been measured as a function of temperature in\\u000a the range of 1223 to 1723 K. Results show that, at a constant temperature, the flux viscosity is primarily dependent on the\\u000a mole fractions of SiO2 and A12O3. The calculated activation energy for viscous flow at 1573 K varies from 59 to

Michael D. Lanyi; Casimir J. Rosa

1981-01-01

104

Prediction of Part Distortion in Die Casting  

SciTech Connect

The die casting process is one of the net shape manufacturing techniques and is widely used to produce high production castings with tight tolerances for many industries. An understanding of the stress distribution and the deformation pattern of parts produced by die casting will result in less deviation from the part design specification, a better die design and eventually more productivity and cost savings. This report presents methods that can be used to simulate the die casting process in order to predict the deformation and stresses in the produced part and assesses the degree to which distortion modeling is practical for die casting at the current time. A coupled thermal-mechanical finite elements model was used to simulate the die casting process. The simulation models the effect of thermal and mechanical interaction between the casting and the die. It also includes the temperature dependant material properties of the casting. Based on a designed experiment, a sensitivity analysis was conducted on the model to investigate the effect of key factors. These factors include the casting material model, material properties and thermal interaction between casting and dies. To verify the casting distortion predictions, it was compared against the measured dimensions of produced parts. The comparison included dimensions along and across the parting plane and the flatness of one surface.

R. Allen Miller

2005-03-30

105

Process development of thin strip steel casting  

SciTech Connect

An important new frontier is being opened in steel processing with the emergence of thin strip casting. Casting steel directly to thin strip has enormous benefits in energy savings by potentially eliminating the need for hot reduction in a hot strip mill. This has been the driving force for numerous current research efforts into the direct strip casting of steel. The US Department of Energy initiated a program to evaluate the development of thin strip casting in the steel industry. In earlier phases of this program, planar flow casting on an experimental caster was studied by a team of engineers from Westinghouse Electric corporation and Armco Inc. A subsequent research program was designed as a fundamental and developmental study of both planar and melt overflow casting processes. This study was arranged as several separate and distinct tasks which were often completed by different teams of researchers. An early task was to design and build a water model to study fluid flow through different designs of planar flow casting nozzles. Another important task was mathematically modeling of melt overflow casting process. A mathematical solidification model for the formation of the strip in the melt overflow process was written. A study of the material and conditioning of casting substrates was made on the small wheel caster using the melt overflow casting process. This report discusses work on the development of thin steel casting.

Sussman, R.C.; Williams, R.S.

1990-12-01

106

Manufacture of large castings in permanent molds  

SciTech Connect

A new technological process has been introduced for manufacturing large cast-iron pulley blanks in permanent molds. The pulley casting weighs 137 kg and has a rim diameter of 650 mm. The permanent mold is split horizontally. Before pouring metal the mold is heated with a gas torch to a temperature of 200-250/sup 0/C and coated with a layer of thermal insulation material. The molten metal is poured at a temperature of 1280-1300/sup 0/C within a period of 40-50 seconds. The casting is held in the mold for 4-5 minutes. A simple pneumatic machine has been designed for ejecting the castings. The permanent mold, being made of cast iron, can be used for more than 500 castings. Introduction of the new technological process for casting pulleys in permanent molds has reduced the labor requirement by four times, eliminated rejections caused by using sand molds, and improved the working conditions.

Panin, V.I.; Baryshnikov, V.G.; Papandopoulo, A.N.

1983-01-01

107

Influence of Casting Parameters on the Critical Casting Size of Bulk Metallic Glass  

NASA Astrophysics Data System (ADS)

The effect of various casting parameters and thermophysical properties of bulk metallic glasses (BMGs) on critical section size, defined as the maximum casting size that generates a through-section amorphous alloy, has been analyzed using a simple heat-transfer model. It was found that the interfacial heat transfer between the mold and the casting has a strong influence on the critical section thickness of a BMG. It is argued herein that the critical cooling rate rather than the critical casting size is a more robust indicator of glass-forming ability (GFA). Further, with respect to the critical cooling rate and heat-transfer effects during casting, a distinct difference was found between the critical casting thickness in rectangular-shaped castings and the critical casting diameter in rod-shaped castings, and a relationship was derived for relating these parameters.

Laws, Kevin J.; Gun, Bulent; Ferry, Michael

2009-10-01

108

Casting Alloys: Side-Effects  

Microsoft Academic Search

Side-effects from dental materials are a minor problem, but should be recognized. In recent questionnaire surveys about side-effects, the incidence was estimated to be 1:300 in periodontics and 1:2600 in pedodontics. None of these reactions was related to dental casting alloys. In prosthodontics, the incidence was calculated to be about 1:400, and about 27% were related to base-metal alloys forremovable

Arne Hensten-Pettersen

1992-01-01

109

Hickey, W8009C, casts 1-9 Hickey, W8009C, casts 1-9, page 1  

E-print Network

Hickey, W8009C, casts 1-9 Hickey, W8009C, casts 1-9, page 1 #12;Hickey, W8009C, casts 1-9 Hickey, W8009C, casts 1-9, page 2 #12;Hickey, W8009C, casts 1-9 Hickey, W8009C, casts 1-9, page 3 #12;Hickey, W8009C, casts 1-9 Hickey, W8009C, casts 1-9, page 4 #12;Hickey, W8009C, casts 1-9 Hickey, W8009C, casts

Hickey, Barbara

110

Gating of Permanent Molds for ALuminum Casting  

SciTech Connect

This report summarizes a two-year project, DE-FC07-01ID13983 that concerns the gating of aluminum castings in permanent molds. The main goal of the project is to improve the quality of aluminum castings produced in permanent molds. The approach taken was determine how the vertical type gating systems used for permanent mold castings can be designed to fill the mold cavity with a minimum of damage to the quality of the resulting casting. It is evident that somewhat different systems are preferred for different shapes and sizes of aluminum castings. The main problems caused by improper gating are entrained aluminum oxide films and entrapped gas. The project highlights the characteristic features of gating systems used in permanent mold aluminum foundries and recommends gating procedures designed to avoid common defects. The study also provides direct evidence on the filling pattern and heat flow behavior in permanent mold castings.

David Schwam; John F. Wallace; Tom Engle; Qingming Chang

2004-03-30

111

A Benchmark Study on Casting Residual Stress  

SciTech Connect

Stringent regulatory requirements, such as Tier IV norms, have pushed the cast iron for automotive applications to its limit. The castings need to be designed with closer tolerances by incorporating hitherto unknowns, such as residual stresses arising due to thermal gradients, phase and microstructural changes during solidification phenomenon. Residual stresses were earlier neglected in the casting designs by incorporating large factors of safety. Experimental measurement of residual stress in a casting through neutron or X-ray diffraction, sectioning or hole drilling, magnetic, electric or photoelastic measurements is very difficult and time consuming exercise. A detailed multi-physics model, incorporating thermo-mechanical and phase transformation phenomenon, provides an attractive alternative to assess the residual stresses generated during casting. However, before relying on the simulation methodology, it is important to rigorously validate the prediction capability by comparing it to experimental measurements. In the present work, a benchmark study was undertaken for casting residual stress measurements through neutron diffraction, which was subsequently used to validate the accuracy of simulation prediction. The stress lattice specimen geometry was designed such that subsequent castings would generate adequate residual stresses during solidification and cooling, without any cracks. The residual stresses in the cast specimen were measured using neutron diffraction. Considering the difficulty in accessing the neutron diffraction facility, these measurements can be considered as benchmark for casting simulation validations. Simulations were performed using the identical specimen geometry and casting conditions for predictions of residual stresses. The simulation predictions were found to agree well with the experimentally measured residual stresses. The experimentally validated model can be subsequently used to predict residual stresses in different cast components. This enables incorporation of the residual stresses at the design phase along with external loads for accurate predictions of fatigue and fracture performance of the cast components.

Johnson, Eric M. [John Deere -- Moline Tech Center; Watkins, Thomas R [ORNL; Schmidlin, Joshua E [ORNL; Dutler, S. A. [MAGMA Foundry Technologies, Inc.

2012-01-01

112

Casting an Object with a Core Hee-Kap Ahn  

E-print Network

Casting an Object with a Core Hee-Kap Ahn Sang Won Bae Siu-Wing Cheng Kyung-Yong Chwa Abstract This paper addresses geometric problems that concern manufacturing an object using a cast with a core. In casting, molten material is poured into the cavity of the cast and allowed to solidify. The cast has two

Cheng, Siu-Wing

113

Release of ToxCastDB and ExpoCastDB databases  

EPA Science Inventory

EPA has released two databases - the Toxicity Forecaster database (ToxCastDB) and a database of chemical exposure studies (ExpoCastDB) - that scientists and the public can use to access chemical toxicity and exposure data. ToxCastDB users can search and download data from over 50...

114

Hickey, W8010A casts 1-6 Hickey, W8010A casts 1-6, page 1  

E-print Network

Hickey, W8010A casts 1-6 Hickey, W8010A casts 1-6, page 1 CTD001 #12;Hickey, W8010A casts 1-6 Hickey, W8010A casts 1-6, page 2 CTD001 #12;Hickey, W8010A casts 1-6 Hickey, W8010A casts 1-6, page 3 CTD001 #12;Hickey, W8010A casts 1-6 Hickey, W8010A casts 1-6, page 4 CTD001 #12;Hickey, W8010A casts 1

Hickey, Barbara

115

AN INTRODUCTION TO R-CAST Developing Simple Agents Using Decision-making Modeling and the R-CAST Architecture  

E-print Network

AN INTRODUCTION TO R-CAST Developing Simple Agents Using Decision-making Modeling and the R-CAST and Technology The Pennsylvania State University #12;ALL RIGHTS RESERVED © 2006. This R-CAST tutorial, the R-CAST. Prindible For more information. Visit: http://agentlab.psu.edu/ 2 #12;R-CAST 2.5 SYSTEM REQUIREMENTS Minimum

116

Yield Improvement in Steel Casting (Yield II)  

SciTech Connect

This report presents work conducted on the following main projects tasks undertaken in the Yield Improvement in Steel Casting research program: Improvement of Conventional Feeding and Risering Methods, Use of Unconventional Yield Improvement Techniques, and Case Studies in Yield Improvement. Casting trials were conducted and then simulated using the precise casting conditions as recorded by the participating SFSA foundries. These results present a statistically meaningful set of experimental data on soundness versus feeding length. Comparisons between these casting trials and casting trials performed more than forty years ago by Pellini and the SFSA are quite good and appear reasonable. Comparisons between the current SFSA feeding rules and feeding rules based on the minimum Niyama criterion reveal that the Niyama-based rules are generally less conservative. The niyama-based rules also agree better with both the trials presented here, and the casting trails performed by Pellini an d the SFSA years ago. Furthermore, the use of the Niyama criterion to predict centerline shrinkage for horizontally fed plate sections has a theoretical basis according to the casting literature reviewed here. These results strongly support the use of improved feeding rules for horizontal plate sections based on the Niyama criterion, which can be tailored to the casting conditions for a given alloy and to a desired level of soundness. The reliability and repeatability of ASTM shrinkage x-ray ratings was investigated in a statistical study performed on 128 x-rays, each of which were rated seven different times. A manual ''Feeding and Risering Guidelines for Steel Castings' is given in this final report. Results of casting trials performed to test unconventional techniques for improving casting yield are presented. These use a stacked arrangement of castings and riser pressurization to increase the casting yield. Riser pressurization was demonstrated to feed a casting up to four time s the distance of a non-pressurized riser, and can increase casting yield by decreasing the required number of risers. All case studies for this projects were completed and compiled into an SFSA Technical Report that is submitted part of this Final Report

Richard A. Hardin; Christoph Beckermann; Tim Hays

2002-02-18

117

Clean cast steel technology. Final report  

SciTech Connect

This report documents the results obtained from the Clean Cast Steel Technology Program financially supported by the DOE Metal Casting Competitiveness Research Program and industry. The primary objective of this program is to develop technology for delivering steel free of oxide macroinclusions to mold cavities. The overall objective is to improve the quality of cast steel by developing and demonstrating the technology for substantially reducing surface and sub-surface oxide inclusions. Two approaches are discussed here. A total of 23 castings were produced by submerge pouring along with sixty conventionally poured castings. The submerged poured castings contained, on average, 96% fewer observable surface inclusions (11.9 vs 0.4) compared to the conventionally poured cast parts. The variation in the population of surface inclusions also decreased by 88% from 5.5 to 0.7. The machinability of the casting was also improved by submerged pouring. The submerge poured castings required fewer cutting tool changes and less operator intervention during machining. Subsequent to these trials, the foundry has decided to purchase more shrouds for continued experimentation on other problem castings where submerge pouring is possible. An examination of melting and pouring practices in four foundries has been carried out. Three of the four foundries showed significant improvement in casting quality by manipulating the melting practice. These melting practice variables can be grouped into two separate categories. The first category is the pouring and filling practice. The second category concerns the concentration of oxidizable elements contained in the steel. Silicon, manganese, and aluminum concentrations were important factors in all four foundries. Clean heats can consistently be produced through improved melting practice and reducing exposure of the steel to atmospheric oxygen during pouring and filling.

Bates, C.E.; Griffin, J.A.

1998-06-01

118

21 CFR 888.5960 - Cast removal instrument.  

Code of Federal Regulations, 2012 CFR

... 2012-04-01 2012-04-01 false Cast removal instrument. 888.5960 Section...DEVICES Surgical Devices § 888.5960 Cast removal instrument. (a) Identification. A cast removal instrument is an AC-powered,...

2012-04-01

119

21 CFR 888.5960 - Cast removal instrument.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 2013-04-01 false Cast removal instrument. 888.5960 Section...DEVICES Surgical Devices § 888.5960 Cast removal instrument. (a) Identification. A cast removal instrument is an AC-powered,...

2013-04-01

120

21 CFR 888.5960 - Cast removal instrument.  

... 2014-04-01 2014-04-01 false Cast removal instrument. 888.5960 Section...DEVICES Surgical Devices § 888.5960 Cast removal instrument. (a) Identification. A cast removal instrument is an AC-powered,...

2014-04-01

121

21 CFR 888.5960 - Cast removal instrument.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 2010-04-01 false Cast removal instrument. 888.5960 Section...DEVICES Surgical Devices § 888.5960 Cast removal instrument. (a) Identification. A cast removal instrument is an AC-powered,...

2010-04-01

122

21 CFR 888.5960 - Cast removal instrument.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 2011-04-01 false Cast removal instrument. 888.5960 Section...DEVICES Surgical Devices § 888.5960 Cast removal instrument. (a) Identification. A cast removal instrument is an AC-powered,...

2011-04-01

123

Blast casting requires fresh assessment of methods  

SciTech Connect

The article says that because blast casting differs from conventional blasting, our ideas about explosive products, drilling, and initiating methods must change. The author discusses how to select a casting explosive and what factors are important in its selection. He also looks at how to determine the best blasthole diameter and burden blasting pattern.

Pilshaw, S.R.

1987-08-01

124

Level Responsive Control with Continuous Casting  

Microsoft Academic Search

REFERENCES TO THE concept of continuous casting of metals are found in literature dating as far back as 1840. Machines were actually constructed in the mid 1800s for the continuous casting of long sections, such as pipes, of nonferrous materials. Since that time, there have been many modifications of the basic ideas, and a large percentage of nonferrous materials are

Torrence E. DeViney; L. J. Penkowski

1965-01-01

125

Control of semicontinuous aluminum casting process  

Microsoft Academic Search

In a semicontinuous casting process, the metal level is controlled by the inflow of liquid metal. The quality of the cast product depends on the accuracy of the mold level control. There is a need for a control strategy giving better results than the fixed parameter controller and simple enough to be implemented on the existing control structure, in order

A. Besancon-Voda; C. Delclos

1998-01-01

126

The CAST (Childhood Asperger Syndrome Test)  

ERIC Educational Resources Information Center

The Childhood Asperger Syndrome Test (CAST) is a parental questionnaire to screen for autism spectrum conditions. In this validation study, the CAST was distributed to 1925 children aged 5-11 in mainstream Cambridgeshire schools. A sample of participants received a full diagnostic assessment, conducted blind to screen status. The sensitivity of…

Williams, Jo; Scott, Fiona; Stott, Carol; Allison, Carrie; Bolton, Patrick; Baron-Cohen, Simon; Brayne, Carol

2005-01-01

127

Bone response to machined cast titanium implants  

Microsoft Academic Search

The aim was to evaluate the bone response to machined cast titanium (Ti) implants. Commercially pure (c.p.) machined Ti implants served as controls. Analyses of the surface composition and topography by Auger electron spectroscopy (AES) and scanning electron microscopy (SEM) revealed no differences comparing the two materials. Cast screw-shaped and identical machined Ti implants were inserted in the tibial metaphysis

S. Mohammadi; M. Esposito; L. Wictorin; B.-O. Aronsson; P. Thomsen

2001-01-01

128

Thermo fatigue cracking of die casting dies  

Microsoft Academic Search

The investigation of aluminium alloy die casting die failures was done with the emphasis on thermal cracks. The aim of the study was to prolog the in-service die life by cladding with maraging steels, which would be economically beneficial. A vast analysis of thermal fatigue cracks in aluminium alloy die casting is done. Immersion test apparatus was developed, which enables

D. Klob?ar; L. Kosec; B. Kosec; J. Tušek

2010-01-01

129

Iron/Phosphorus Alloys for Continuous Casting  

NASA Technical Reports Server (NTRS)

Continuous casting becomes practicable because of reduced eutectic temperature. Experimental ferrous alloy has melting point about 350 degrees C lower than conventional steels, making possible to cast structural members and eliminating need for hot rolling. Product has normal metal structure and good physical properties. Process used to make rails, beams, slabs, channels, and pipes.

Dufresne, E. R.

1986-01-01

130

Thermomechanical model of a continuous casting process  

Microsoft Academic Search

A model for the analysis of thermal stresses arising at the early stage of a continuous casting process is proposed. The model is used to simulate the casting of round billets assuming axial symmetry. Thermal analysis takes into account phase-change in the material and heat transfer through the mould. The heat balance equation is solved using an Eulerian formulation for

A. E. Huespe; A. Cardona; V. Fachinotti

2000-01-01

131

Slip casting and nitridation of silicon powder  

NASA Technical Reports Server (NTRS)

Powdered Silicon was slip-cast with a CaSO4 x 0.5H2O mold and nitrided in a N atm. containing 0 or 5 vol. % H at 1000 to 1420 deg. To remove the castings, the modeling faces were coated successively with an aq. salt soap and powdered cellulose containing Na alginate, and thus prevented the sticking problem.

Seiko, Y.

1985-01-01

132

Dimensional variability of production steel castings  

SciTech Connect

Work is ongoing to characterize the dimensional variability of steel casting features. Data are being collected from castings produced at representative Steel Founders` Society of America foundries. Initial results based on more than 12,500 production casting feature measurements are presented for carbon and low alloy steel castings produced in green sand, no-bake, and shell molds. A comprehensive database of casting, pattern, and feature variables has been developed so that the influence of the variables on dimensional variability can be determined. Measurement system analysis is conducted to insure that large measurement error is not reported as dimensional variability. Results indicate that the dimensional variability of production casting features is less than indicated in current US (SFSA) and international (ISO) standards. Feature length, casting weight, parting line and molding process all strongly influence dimensional variability. Corresponding pattern measurements indicate that the actual shrinkage amount for casting features varies considerably. This variation in shrinkage will strongly influence the ability of the foundry to satisfy customer dimensional requirements.

Peters, F.E.; Risteu, J.W.; Vaupel, W.G.; DeMeter, E.C.; Voigt, R.C.

1994-12-31

133

Aqueous tape casting of silicon nitride  

Microsoft Academic Search

Slurries consisting of a low cost silicon nitride powder, sintering aids yttria and alumina, dispersants, binders, defoamers and water as a solvent were optimised for tape casting by electroacoustic and viscosity measurements and by casting experiments. The slurries exhibit shear-thinning behaviour due to the highly shear-thinning binder emulsion. Crack free tapes with a maximum thickness of approx. 250 ?m and

Bernd Bitterlich; Jürgen G Heinrich

2002-01-01

134

Knee motion in a long leg cast  

Microsoft Academic Search

Five principles to reestablish static ligamentous sta bility are introduced, including secure, temporary, ti biofemoral fixation to protect against early postoper ative stretch or disruption. The necessity for empha sizing this point is demonstrated by a cadaver study. Knee motion in and out of long leg plaster casts was carefully studied in necropsy specimens. Casts ap plied over minimal or

Kenneth A. Krackow; William Laughlin Vetter

1981-01-01

135

Casting of electron field defining apertures: casting with the metal mold kits.  

PubMed

Cerrobend alloy casts are made to define the desired electron field shapes. These custom casts are fabricated for the selected electron applicator size that has been chosen for the patient. When the cast is placed into that selected electron applicator, it will block out areas that are not to be treated. When an all metal mold assembly was used for the fabrication of these casts, the lip region of the cast which is used to accurately align the cast in the actual treatment applicator, had an irregular edge that prevented an accurate alignment of the cast. To eliminate the irregular edges on the lip region of the cast, the metal mold assembly was heated to approximately 80-85 degrees C before the molten cerrobend alloy was poured into it. The heating of the metal mold assembly helps eliminate the irregular edges on the lip region of the cast. Unfortunately it also created new flaws such as holes, dents, cracks and/or crystallization of the cast as it solidified. These flaws were controlled by cooling the metal mold assembly and the cast immediately after the pouring of the molten cerrobend alloy, evenly with water. PMID:3151256

Dea, D; San Luis, E

1988-09-01

136

Hickey -TT174, casts 21, line 18 to cast 31, line 24 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date/Time (MMDDYYHHMM) Total Scans  

E-print Network

Hickey -TT174, casts 21, line 18 to cast 31, line 24 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date;Hickey -TT174, casts 21, line 18 to cast 31, line 24 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date;Hickey -TT174, casts 21, line 18 to cast 31, line 24 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date

Hickey, Barbara

137

The role of water in slip casting  

NASA Technical Reports Server (NTRS)

Slips and casting are considered in terms of physical and colloidal chemistry. Casting slips are polydisperse suspensions of lyophobic particles in water, whose degree of coagulation is controlled by interaction of flocculating and deflocculating agents. Slip casting rate and viscosity are functions of temperature. Slip rheology and response to deflocculating agents varies significantly as the kinds and amounts of colloid modifiers change. Water is considered as a raw material. Various concepts of water/clay interactions and structures are discussed. Casting is a de-watering operation in which water moves from slip to cast to mold in response to a potential energy termed moisture stress. Drying is an evaporative process from a free water surface.

Mccauley, R. A.; Phelps, G. W.

1984-01-01

138

Subcritical Measurments Multiple HEU Metal Castings  

SciTech Connect

Experiments with the standard annular highly enriched uranium (HEU) metal castings at the Y-12 National Security Complex were performed in which up to five castings ({approx}90 kg) were assembled in a tightly packed array with minimal spacing between castings. The fission chain multiplication process was initiated by a time-tagged {sup 252}Cf spontaneously fissioning neutron source or by time and directionally tagged neutrons from a small portable DT neutron generator. The prompt neutron time behavior was measured with plastic scintillation detectors sensitive to the fast neutron (>1 MeV) and gamma ray without distinction. These experiments were performed to provide data to benchmark methods for the calculation of the prompt neutron time behavior. Previous measurements with a single casting have been reported. This paper presents the experimental results for multiple castings.

Mihalczo, John T [ORNL] [ORNL; Archer, Daniel E [ORNL] [ORNL; Wright, Michael C [ORNL] [ORNL; Mullens, James Allen [ORNL] [ORNL

2008-01-01

139

Porosity inside a metal casting  

NASA Technical Reports Server (NTRS)

Pores and voids often form in metal castings on Earth (above) making them useless. A transparent material that behaves at a large scale in microgravity the way that metals behave at the microscopic scale on Earth, will help show how voids form and learn how to prevent them. Scientists are using the microgravity environment on the International Space Station to study how these bubbles form, move and interact. The Pore Formation and Mobility Investigation (PFMI) in the Microgravity Science Glovebox aboard the International Space Station uses a transparent material called succinonitrile that behaves like a metal to study this problem. Video images sent to the ground allow scientists to watch the behavior of the bubbles as they control the melting and freezing of the material. The bubbles do not float to the top of the material in microgravity, so they can study their interactions.

2003-01-01

140

Hickey, W8206_ctd_casts 67-128 Hickey, W8206_ctd_casts 67-128, page 1  

E-print Network

Hickey, W8206_ctd_casts 67-128 Hickey, W8206_ctd_casts 67-128, page 1 #12;Hickey, W8206_ctd_casts 67-128 Hickey, W8206_ctd_casts 67-128, page 2 #12;Hickey, W8206_ctd_casts 67-128 Hickey, W8206_ctd_casts 67-128, page 3 #12;Hickey, W8206_ctd_casts 67-128 Hickey, W8206_ctd_casts 67-128, page 4 #12;Hickey

Hickey, Barbara

141

Hickey, W8010A casts 28-31 Hickey, W8010A casts 28-31, page 1  

E-print Network

Hickey, W8010A casts 28-31 Hickey, W8010A casts 28-31, page 1 CTD028 #12;Hickey, W8010A casts 28-31 Hickey, W8010A casts 28-31, page 2 CTD028 #12;Hickey, W8010A casts 28-31 Hickey, W8010A casts 28-31, page 3 CTD028 #12;Hickey, W8010A casts 28-31 Hickey, W8010A casts 28-31, page 4 CTD028 #12;Hickey, W8010A

Hickey, Barbara

142

Hickey, W8010A casts 32-34 Hickey, W8010A casts 32-34, page 1  

E-print Network

Hickey, W8010A casts 32-34 Hickey, W8010A casts 32-34, page 1 CTD032 #12;Hickey, W8010A casts 32-34 Hickey, W8010A casts 32-34, page 2 CTD032 #12;Hickey, W8010A casts 32-34 Hickey, W8010A casts 32-34, page 3 CTD032 #12;Hickey, W8010A casts 32-34 Hickey, W8010A casts 32-34, page 4 CTD032 #12;Hickey, W8010A

Hickey, Barbara

143

Hickey, W8010A casts 35-40 Hickey, W8010A casts 35-40, page 1  

E-print Network

Hickey, W8010A casts 35-40 Hickey, W8010A casts 35-40, page 1 CTD035 #12;Hickey, W8010A casts 35-40 Hickey, W8010A casts 35-40, page 2 CTD035 #12;Hickey, W8010A casts 35-40 Hickey, W8010A casts 35-40, page 3 CTD035 #12;Hickey, W8010A casts 35-40 Hickey, W8010A casts 35-40, page 4 CTD035 #12;Hickey, W8010A

Hickey, Barbara

144

Hickey, W8010A casts 21-27 Hickey, W8010A casts 21-27, page 1  

E-print Network

Hickey, W8010A casts 21-27 Hickey, W8010A casts 21-27, page 1 CTD021 #12;Hickey, W8010A casts 21-27 Hickey, W8010A casts 21-27, page 2 CTD021 #12;Hickey, W8010A casts 21-27 Hickey, W8010A casts 21-27, page 3 CTD021 #12;Hickey, W8010A casts 21-27 Hickey, W8010A casts 21-27, page 4 CTD022 #12;Hickey, W8010A

Hickey, Barbara

145

NWIS MEASUREMENTS FOR URANIUM METAL ANNULAR CASTINGS  

SciTech Connect

This report describes measurements performed with annular uranium metal castings of different enrichments to investigate the use of {sup 252}Cf-source-driven noise analysis measurements as a means to quantify the amount of special nuclear material (SNM) in the casting. This work in FY 97 was sponsored by the Oak Ridge Y-12 Plant and the DOE Office of Technology Development Programs. Previous measurements and calculational studies have shown that many of the signatures obtained from the source-driven measurement are very sensitive to fissile mass. Measurements were performed to assess the applicability of this method to standard annular uranium metal castings at the Oak Ridge Y-12 plant under verification by the International Atomic Energy Agency (IAEA) using the Nuclear Weapons Identification System (NWIS) processor. Before the measurements with different enrichments, a limited study of source-detector-casting moderator configurations was performed to enhance the correlated information. These configurations consisted of a casting with no reflector and with various thicknesses of polyethylene reflectors up to 10.16 cm in 2.54 cm steps. The polyethylene moderator thickness of 7.62 cm was used for measurements with castings of different enrichments reported here. The sensitivity of the measured parameters to fissile mass was investigated using four castings each with a different enrichment. The high sensitivity of this measurement method to fissile mass and to other material and configurations provides some advantages over existing safeguards methods.

MATTINGLY, J.K.; VALENTINE, T.E.; MIHALCZO, J.T.

1998-03-13

146

AMCC casting development. Volume 1: Executive Summary  

NASA Astrophysics Data System (ADS)

The Advanced Combustion Chamber Casting (AMCC) has been a technically challenging part due to its size, configuration, and alloy type. The height and weight of the wax pattern assembly necessitated the development of a hollow gating system to ensure structural integrity of the shell throughout the investment process. The complexity in the jacket area of the casting required the development of an innovative casting technology that PCC has termed 'TGC' or Thermal Gradient Control. This method, of setting up thermal gradients in the casting during solidification, represents a significant process improvement for PCC and has been successfully implemented on other programs. Metallurgical integrity of the final four castings was very good. Only the areas of the parts that utilized 'TGC Shape & Location System #2' showed any significant areas of microshrinkage when evaluated by non-destructive tests. Alumina oxides detected by FPI on the 'float' surfaces (top sid surfaces of the casting during solidification) of the part were almost entirely less than the acceptance criteria of .032 inches in diameter. Destructive chem mill of the castings was required to determine the effect of the process variables used during the processing of these last four parts (with the exception of the 'Shape & Location of TGC' variable).

1995-03-01

147

AMCC casting development. Volume 1: Executive Summary  

NASA Technical Reports Server (NTRS)

The Advanced Combustion Chamber Casting (AMCC) has been a technically challenging part due to its size, configuration, and alloy type. The height and weight of the wax pattern assembly necessitated the development of a hollow gating system to ensure structural integrity of the shell throughout the investment process. The complexity in the jacket area of the casting required the development of an innovative casting technology that PCC has termed 'TGC' or Thermal Gradient Control. This method, of setting up thermal gradients in the casting during solidification, represents a significant process improvement for PCC and has been successfully implemented on other programs. Metallurgical integrity of the final four castings was very good. Only the areas of the parts that utilized 'TGC Shape & Location System #2' showed any significant areas of microshrinkage when evaluated by non-destructive tests. Alumina oxides detected by FPI on the 'float' surfaces (top sid surfaces of the casting during solidification) of the part were almost entirely less than the acceptance criteria of .032 inches in diameter. Destructive chem mill of the castings was required to determine the effect of the process variables used during the processing of these last four parts (with the exception of the 'Shape & Location of TGC' variable).

1995-01-01

148

The CAST experiment: status and perspectives  

E-print Network

The status of the solar axion search with the CERN Axion Solar Telescope (CAST) will be discussed. Results from the first part of CAST phase II where the magnet bores were filled with 4He gas at variable pressure in order to scan axion masses up to 0.4 eV will be presented. From the absence of excess X-rays when the magnet was pointing to the Sun, we set a typical upper limit on the axion-photon coupling of g CAST phase II. Expectations for sensibilities will be given. Near future perspectives as well as more long term options for a new helioscope experiment will be evoked.

F. J. Iguaz

2011-10-10

149

Methods for Casting Subterranean Ant Nests  

PubMed Central

The study of subterranean ant nests has been impeded by the difficulty of rendering their structures in visible form. Here, several different casting materials are shown to make perfect casts of the underground nests of ants. Each material (dental plaster, paraffin wax, aluminum, zinc) has advantages and limitations, which are discussed. Some of the materials allow the recovery of the ants entombed in the casts, allowing a census of the ants to be connected with features of their nest architecture. The necessary equipment and procedures are described in the hope that more researchers will study this very important aspect of ant natural history. PMID:20673073

Tschinkel, Walter R.

2010-01-01

150

Basic Casting from A to Z. Student's Instruction Booklet.  

ERIC Educational Resources Information Center

A profusely illustrated student instruction booklet contains step-by-step directions and diagrams for learning four basic casting techniques. Separate sections cover basic spin-casting, spinning, bait-casting, and fly-casting. Each section details recommended equipment (reel, rod, line, plug, tackle, lures, leaders, flies), describes specific…

Zebco, Tulsa, OK.

151

Separating an Object from its Cast Hee-Kap Ahn  

E-print Network

Separating an Object from its Cast Hee-Kap Ahn Mark de Bergy Prosenjit Bosez Siu-Wing Cheng Dan Halperinx Jir Matousek Otfried Schwarzkopf Abstract In casting, liquid is poured into a cast that has a cavity with the shape of the object to be manufactured. The liquid then hardens, after which the cast

Utrecht, Universiteit

152

COMPARISON OF FATIGUE BEHAVIOR FOR CENTRIFUGALLY CAST AND  

E-print Network

COMPARISON OF FATIGUE BEHAVIOR FOR CENTRIFUGALLY CAST AND KEEL BLOCK CAST STEEL J.J. Gradman1 , R The objective of this research was to determine if location through the wall thickness of centrifugal castings affects fatigue properties and to compare fatigue and monotonic tensile properties of centrifugal castings

Beckermann, Christoph

153

Clamshell Casting Prosenjit Bose, Pat Morin, Michiel Smid, Stefanie Wuhrer  

E-print Network

Clamshell Casting Prosenjit Bose, Pat Morin, Michiel Smid, Stefanie Wuhrer School of Computer}@scs.carleton.ca Abstract A popular manufacturing technique is clamshell casting, where liquid is poured into a cast and the cast is removed by a rotation once the liquid has hardened. We consider the case where the object

Smid, Michiel

154

Casting with Skewed Ejection Direction Hee-Kap Ahn1  

E-print Network

Casting with Skewed Ejection Direction Hee-Kap Ahn1 Siu-Wing Cheng2 Otfried Cheong3 Abstract Casting is a manufacturing process in which liquid is poured into a cast (mould) that has a cavity with the shape of the object to be manufactured. The liquid then hardens, after which the cast is removed. We

Cheng, Siu-Wing

155

GRINDING ROOM AT SOUTHERN DUCTILE CASTING COMPANY, BESSEMER FOUNDRY SHOWING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

GRINDING ROOM AT SOUTHERN DUCTILE CASTING COMPANY, BESSEMER FOUNDRY SHOWING WHEELABORATOR THAT IMPALE SHOT AT TUMBLING CASTINGS TO REMOVE EXCESS SURFACE METALS AND SAND; ANNEALING OVENS TO HEAT CERTAIN CASTINGS TO ACHIEVE A DESIRED CHARACTERISTIC; AND GRINDING WHEELS USED TO REMOVE GATES. - Southern Ductile Casting Company, Grinding & Shipping, 2217 Carolina Avenue, Bessemer, Jefferson County, AL

156

Modelling of reoxidation inclusion formation in steel sand casting  

E-print Network

deoxidation inclusions (for which buoyancy is negligible) in continuous casting (rather than in shape castingModelling of reoxidation inclusion formation in steel sand casting A. J. Melendez, K. D. Carlson pouring, as well as their final locations on the surface of steel sand castings. Inclusions originate

Beckermann, Christoph

157

Thermal transport properties of grey cast irons  

SciTech Connect

Thermal diffusivity and thermal conductivity of grey cast iron have been measured as a function of graphite flake morphology, chemical composition, and position in a finished brake rotor. Cast iron samples used for this investigation were cut from ``step block`` castings designed to produce iron with different graphite flake morphologies resulting from different cooling rates. Samples were also machined from prototype alloys and from production brake rotors representing a variation in foundry practice. Thermal diffusivity was measured at room and elevated temperatures via the flash technique. Heat capacity of selected samples was measured with differential scanning calorimetry, and these results were used to calculate the thermal conductivity. Microstructure of the various cast iron samples was quantified by standard metallography and image analysis, and the chemical compositions were determined by optical emission spectroscopy.

Hecht, R.L. [Ford Motor Co., Dearborn, MI (United States). Ford Research Lab.; Dinwiddie, R.B.; Porter, W.D.; Wang, Hsin [Oak Ridge National Lab., TN (United States)

1996-10-01

158

Caste in India, Past and Present  

ERIC Educational Resources Information Center

Traced is the sociocultural framework for the system in Indian culture which emphasized duty and obligations rather than individual freedom and rights. Also discussed are contemporary changes in the caste system. (DB)

Bishop, Donald H.

1971-01-01

159

14 CFR 23.621 - Casting factors.  

Code of Federal Regulations, 2010 CFR

...ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Design and Construction § 23.621 Casting...established and an acceptable statistical analysis supports reduction, non-destructive...berth, safety belt, and fuel and oil tank supports and attachments, and cabin...

2010-01-01

160

Open Cast Mining: An Environmental Issue.  

ERIC Educational Resources Information Center

Presents a case study in which students investigate the environmental issue of open cast coal mining. Students examine the issue from different perspectives; interpret the available evidence; draw appropriate conclusions; and evaluate such conclusions. (MDH)

McPartland, Michael

1993-01-01

161

DIVISION 04 MASONRY 04720 CAST STONE  

E-print Network

DIVISION 04 ­ MASONRY _____________________________________________________________ 04720 CAST coordinate with coursing of other masonry materials in the assembly. B. Special Documentation Requirements 1, as required in the Unit Masonry Assemblies section of the Design Standards Manual. 2. Drawings shall indicate

162

Advanced lost foam from casting technology  

SciTech Connect

Previous research made significant advances in understanding the Lost Foam Casting (LFC) Process and clearly identified areas where additional research was needed to improve the process and make it more functional in an industrial environment. The current project focused on five areas listed as follows: Task 1: Precision Pattern Production Task 2: Pattern Coating Consistency Task 3: Sand Fill and Compaction Effects Task 4: Pattern Gating Task 5: Mechanical Properties of Castings. This report summarizes the work done under the current contract in all five areas in the period of October 1, 1994 through December 31, 1995. Twenty-eight (28) companies jointly participate in the project. These companies represent a variety of disciplines, including pattern designers, pattern producers, coating manufacturers, plant design companies, compaction equipment manufacturers, casting producers, and casting buyers.

Bates, C.E.; Littleton, H.E.; Askeland, D., Griffin, J., Miller, B.A., Sheldon, D.S.

1996-05-01

163

14 CFR 29.621 - Casting factors.  

...Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT...support structural loads. (b) Bearing stresses and surfaces. The casting factors...exceed 1.25 with respect to bearing stresses regardless of the method of...

2014-01-01

164

14 CFR 27.621 - Casting factors.  

...Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT...support structural loads. (b) Bearing stresses and surfaces. The casting factors...exceed 1.25 with respect to bearing stresses regardless of the method of...

2014-01-01

165

Vacuum casting of thick polymeric films  

NASA Technical Reports Server (NTRS)

Bubble formation and layering, which often plague vacuum-evaporated films, are prevented by properly regulating process parameters. Vacuum casting may be applicable to forming thick films of other polymer/solvent solutions.

Cuddihy, E. F.; Moacanin, J.

1979-01-01

166

Genetic structure of Rajaka caste and affinities with other caste populations of Andhra Pradesh, India.  

PubMed

The present study gives an account of the genetic structure in terms of distribution of a few genetic markers, viz., A1A2B0, Rh(D), G6PD deficiency and haemoglobin among the Rajaka caste population of Andhra Pradesh, India. The genetic relationships of the Rajaka caste with other Andhra caste populations were investigated in terms of genetic distance, i.e., Sq B (mn) of Balakrishnan and Sanghvi. Relatively lesser distance was established between the Rajaka and two Panchama castes. Also, the pattern of genetic distance corroborates the hierarchical order of the Hindu varna system. PMID:9428195

Parvatheesam, C; Babu, B V; Babu, M C

1997-01-01

167

WinMod: An expert advisor for investment casting  

SciTech Connect

Investment casting is an important method for fabricating a variety of high quality components in mechanical systems. Cast components, unfortunately, have a large design and gate/runner build time associated with their fabrication. In addition, casting engineers often require many years of actual experience in order to consistently pour high quality castings. Since 1989, Sandia National Laboratories has been investigating casting technology and software that will reduce the time overhead involved in producing quality casts. Several companies in the casting industry have teamed up with Sandia to form the FASTCAST Consortium. One result of this research and the formation of the FASTCAST consortium is the creation of the WinMod software, an expert casting advisor that supports the decision making process of the casting engineer through visualization and advice to help eliminate possible casting defects.

Bivens, H.P.; Williamson, G.A. Jr.; Luger, G.F. [Univ. of New Mexico, Albuquerque, NM (United States). Computer Science Dept.; Erdmann, R.G. [Univ. of Arizona, Tucson, AZ (United States). Dept. of Materials Science and Engineering; Maguire, M.C.; Baldwin, M.D.; Anderson, D.J. [Sandia National Labs., Albuquerque, NM (United States)

1998-04-01

168

Embedding Optical Fibers In Cast Metal Parts  

NASA Technical Reports Server (NTRS)

Use of metal strain reliefs eliminates breakage of fibers during casting process. Technique for embedding fused silica optical fibers in cast metal parts devised. Optical fiber embedded in flange, fitting, or wall of vacuum or pressure chamber, to provide hermetically sealed feedthrough for optical transmission of measurement or control signals. Another example, optical-fiber temperature sensor embedded in metal structural component to measure strain or temperature inside component.

Gibler, William N.; Atkins, Robert A.; Lee, Chung E.; Taylor, Henry F.

1995-01-01

169

Computed Tomography For Internal Inspection Of Castings  

NASA Technical Reports Server (NTRS)

Computed tomography used to detect internal flaws in metal castings before machining and otherwise processing them into finished parts. Saves time and money otherwise wasted on machining and other processing of castings eventually rejected because of internal defects. Knowledge of internal defects gained by use of computed tomography also provides guidance for changes in foundry techniques, procedures, and equipment to minimize defects and reduce costs.

Hanna, Timothy L.

1995-01-01

170

Apollo 14 composite casting demonstration  

NASA Technical Reports Server (NTRS)

This program assisted in the design and implementation of the composite casting demonstration for the Apollo 14 mission. Both flight and control samples were evaluated. Some conclusions resulting from a comparison of the flight and control samples were: (1) Solidification in neither the flight nor control samples was truly directional. (2) Apparent intermittent contact of the melt with the container in the flight samples led to unusual nucleation and growth structures. (3) There was greater uniformity, on a macro scale, of both pores and structural features in the flight sample; presumably the result of the reduced gravity conditions. (4) It seems quite feasible to produce enhanced dispersions of gases and dense phases in a melt which is solidified in reduced gravity. (5) A two-stage heating/cooling cycle may help directional solidification. (6) Sample materials should be selected from materials in which the dispersant fully wets the matrix material. (7) Experiments should be conducted in two modes: (1) where the melt is in good thermal contact with the container, and (2) where the melt is in a free-float condition.

1971-01-01

171

CS/EE 181a 2008/09 CAST Lecture CAST is both a language and a toolkit originally de-  

E-print Network

CS/EE 181a 2008/09 CAST Lecture CAST is both a language and a toolkit originally de- signed Rule? · How to get the most out of the CAST language. Basic idea: describe circuits digitally in a programming notation, build them with magic, check that you built what you intended. CAST is used

Martin, Alain

172

CS/EE 181a 2010/2011 CAST Lecture CAST is both a language and a toolkit originally de-  

E-print Network

CS/EE 181a 2010/2011 CAST Lecture CAST is both a language and a toolkit originally de- signed Rule? · How to get the most out of the CAST language. Basic idea: describe circuits digitally in a programming notation, build them with magic, check that you built what you intended. CAST is used

Martin, Alain

173

CS/EE 181a 2013/2014 CAST Lecture CAST is both a language and a toolkit originally de-  

E-print Network

CS/EE 181a 2013/2014 CAST Lecture CAST is both a language and a toolkit originally de- signed Rule? · How to get the most out of the CAST language. Basic idea: describe circuits digitally in a programming notation, build them with magic, check that you built what you intended. CAST is used

Martin, Alain

174

CYRANO CAST LIST: All Cast members need to be measured in the costume shop before semester break. Please  

E-print Network

CYRANO CAST LIST: All Cast members need to be measured in the costume shop before semester break: Anna Morreale #12;The Serpent Lady Cast List FARRUSCAD; Casey James CHERESTANI; Adia Alli CANZADE/s CHERESTANI); Katherine Schooler FULMINA; Jenna Jo Pawlicki TERRAMOTA; Marley Boone Peter Pan Cast List PETER

Liu, Taosheng

175

Preferential dissolution behaviour in Ni-Cr dental cast alloy  

Microsoft Academic Search

A Ni-Cr-Mo dental alloy was fabricated by three different casting methods, viz. centrifugal casting, high frequency induction\\u000a casting and vacuum pressure casting. The dependence of cast microstructure on the electrochemical corrosion behaviour was\\u000a investigated using potentiodynamic cyclic and potentiostatic polarization techniques, impedance spectroscopy and scanning\\u000a electron microscopy. The experimental results were compared and discussed with those obtained for a Co-Cr-Mo

Viswanathan S. Saji; Han Cheol Choe

2010-01-01

176

Neutron radiography inspection of investment castings.  

PubMed

Investment casting, also known as the lost wax process, is a manufacturing method employed to produce near net shape metal articles. Traditionally, investment casting has been used to produce structural titanium castings for aero-engine applications with wall thickness less than 1 in (2.54 cm). Recently, airframe manufacturers have been exploring the use of titanium investment casting to replace components traditionally produced from forgings. Use of titanium investment castings for these applications reduces weight, cost, lead time, and part count. Recently, the investment casting process has been selected to produce fracture critical structural titanium airframe components. These airframe components have pushed the traditional inspection techniques to their physical limits due to cross sections on the order of 3 in (7.6 cm). To overcome these inspection limitations, a process incorporating neutron radiography (n-ray) has been developed. In this process, the facecoat of the investment casting mold material contains a cocalcined mixture of yttrium oxide and gadolinium oxide. The presence of the gadolinium oxide, allows for neutron radiographic imaging (and eventual removal and repair) of mold facecoat inclusions that remain within these thick cross sectional castings. Probability of detection (POD) studies have shown a 3 x improvement of detecting a 0.050 x 0.007 in2 (1.270 x 0.178 mm2) inclusion of this cocalcined material using n-ray techniques when compared to the POD using traditional X-ray techniques. Further, it has been shown that this n-ray compatible mold facecoat material produces titanium castings of equal metallurgical quality when compared to the traditional materials. Since investment castings can be very large and heavy, the neutron radiography facilities at the University of California, Davis McClellan Nuclear Radiation Center (UCD/MNRC) were used to develop the inspection techniques. The UCD/MNRC has very unique facilities that can handle large parts up to 39 ft (12 m) in length and 13 ft (4 m) high weighing up to 5000 lbs (2300 kg). These handling systems are robotically driven. The neutron radiographic system consists of a highly thermalized neutron beam. The neutron beam has an intensity of 5.6 x 10(6) n/cm2 s, with a L/D = 200 at a power of 2 MW. A divergent beam collimator is used which provides a beam of approximately 22 in (56 cm) in diameter at the film plane. A vacuum cassette with a gadolinium vapor deposited screen is used to collect the image. Exposure times can be as short as 3 min, or up to 30 min. PMID:15246417

Richards, W J; Barrett, J R; Springgate, M E; Shields, K C

2004-10-01

177

Recrystallization microstructures and textures in AA 5052 continuous cast and direct chill cast aluminum alloy  

Microsoft Academic Search

Commercially produced hot bands of AA 5052 continuous cast (CC) and direct chill (DC) cast aluminum alloys were cold rolled to (thickness) reductions of 70%, 80%, and 90% followed by annealing at different conditions. The recrystallization kinetics are found equivalent for both the CC and DC materials. Recrystallization microstructures are different between the CC and DC materials. Evolution of recrystallization

Jiantao Liu; James G. Morris

2004-01-01

178

Batching devices for intermediate ladles for continuous steel casting plants with automatic control of casting  

Microsoft Academic Search

Automatic control of the steel casting process requires batching devices for the intermediate ladle, ensuring stability in the consumption characteristics. The intermediate ladles of industrial continuous steel casting plants in the USSR are fitted with stopper batching devices. The metal consumption may be controlled by changing the size of the gap between the plug and the seating of the batehing

D. P. Evteev; N. M. Frolovskii; M. G. Chigrinov; V. Ya. Genkin

1969-01-01

179

Casting And Solidification Technology (CAST): Directional solidification phenomena in a metal model at reduced gravity  

NASA Technical Reports Server (NTRS)

The Casting and Solidification Technology (CAST) experiment will study the phenomena that occur during directional solidification of an alloy, e.g., constitutional supercooling, freckling, and dendrite coarsening. The reduced gravity environment of space will permit the individual phenomena to be examined with minimum complication from buoyancy driven flows.

Mccay, M. H.

1988-01-01

180

Methods and apparatus for manufacturing monocrystalline cast silicon and monocrystalline cast silicon bodies for photovoltaics  

DOEpatents

Methods and apparatuses are provided for casting silicon for photovoltaic cells and other applications. With such methods and apparatuses, a cast body of monocrystalline silicon may be formed that is free of, or substantially free of, radially-distributed impurities and defects and having at least two dimensions that are each at least about 35 cm is provided.

Stoddard, Nathan G

2014-01-14

181

Advanced Pattern Material for Investment Casting Applications  

SciTech Connect

Cleveland Tool and Machine (CTM) of Cleveland, Ohio in conjunction with Harrington Product Development Center (HPDC) of Cincinnati, Ohio have developed an advanced, dimensionally accurate, temperature-stable, energy-efficient and cost-effective material and process to manufacture patterns for the investment casting industry. In the proposed technology, FOPAT (aFOam PATtern material) has been developed which is especially compatible with the investment casting process and offers the following advantages: increased dimensional accuracy; increased temperature stability; lower cost per pattern; less energy consumption per pattern; decreased cost of pattern making equipment; decreased tooling cost; increased casting yield. The present method for investment casting is "the lost wax" process, which is exactly that, the use of wax as a pattern material, which is then melted out or "lost" from the ceramic shell. The molten metal is then poured into the ceramic shell to produce a metal casting. This process goes back thousands of years and while there have been improvements in the wax and processing technology, the material is basically the same, wax. The proposed technology is based upon an established industrial process of "Reaction Injection Molding" (RIM) where two components react when mixed and then "molded" to form a part. The proposed technology has been modified and improved with the needs of investment casting in mind. A proprietary mix of components has been formulated which react and expand to form a foam-like product. The result is an investment casting pattern with smooth surface finish and excellent dimensional predictability along with the other key benefits listed above.

F. Douglas Neece Neil Chaudhry

2006-02-08

182

Predicting Pattern Tooling and Casting Dimensions for Investment Casting - Phase II  

SciTech Connect

The investment casting process allows the production of complex-shape parts and close dimensional tolerances. One of the most important phases in the investment casting process is the design of the pattern die. Pattern dies are used to create wax patterns by injecting wax into dies. The wax patterns are used to create a ceramic shell by the application of a series of ceramic coatings, and the alloy is cast into the dewaxed shell mold (Fig. 1.1). However, the complexity of shape and the close dimensional tolerances required in the final casting make it difficult to determine tooling dimensions. The final linear dimension of the casting depends on the cumulative effects of the linear expansions or contractions in each step of the investment casting process (Fig. 1.2). In most cases, the mold geometry or cores restrict the shrinkage of the pattern or the cast part, and the final casting dimensions may be affected by time-dependent processes such as viscoelastic deformation of the wax, and viscoplastic creep and plastic deformations of the shell and alloy. The pattern die is often reworked several times to produce castings whose dimensions are within acceptable tolerances. To date, investment casting technology has been based on hands-on training and experience. Technical literature is limited to experimental, phenomenological studies aimed at obtaining empirical correlations for quick and easy application in industry. The goal of this project was to predict casting dimensions for investment castings in order to meet blueprint nominal during the first casting run. Several interactions have to be considered in a coupled manner to determine the shrinkage factors: these are the die-wax, wax-shell, and shell-alloy interactions (as illustrated in Fig. 1.3). In this work, the deformations of the die-wax and shell-alloy systems were considered in a coupled manner, while the coupled deformation of the wax-shell system was not considered. Future work is needed in order to deliver to industry a computer program in which all three systems are coupled for determining the dimensions of the wax pattern, the shell mold, and casting in a sequential but coupled manner.

Sabau, Adrian S [ORNL

2005-09-01

183

The CAST Manual John Yen*, Thomas R. Ioerger^, Michael S. Miller^, Shuang Sun*,  

E-print Network

The CAST Manual John Yen*, Thomas R. Ioerger^, Michael S. Miller^, Shuang Sun*, Kaivan Kamali................................................................................................................. 4 3. About CAST ........................................................................................................... 6 3.3. CAST architecture

184

40 CFR 420.60 - Applicability; description of the continuous casting subcategory.  

Code of Federal Regulations, 2012 CFR

...Applicability; description of the continuous casting subcategory. 420.60 ...MANUFACTURING POINT SOURCE CATEGORY Continuous Casting Subcategory § 420.60 Applicability; description of the continuous casting subcategory. The...

2012-07-01

185

40 CFR 420.60 - Applicability; description of the continuous casting subcategory.  

Code of Federal Regulations, 2013 CFR

...Applicability; description of the continuous casting subcategory. 420.60 ...MANUFACTURING POINT SOURCE CATEGORY Continuous Casting Subcategory § 420.60 Applicability; description of the continuous casting subcategory. The...

2013-07-01

186

40 CFR 420.60 - Applicability; description of the continuous casting subcategory.  

...Applicability; description of the continuous casting subcategory. 420.60 ...MANUFACTURING POINT SOURCE CATEGORY Continuous Casting Subcategory § 420.60 Applicability; description of the continuous casting subcategory. The...

2014-07-01

187

Removable cast walker boots yield greater forefoot off-loading than total contact casts  

PubMed Central

Background Elevated plantar loading has been implicated in the etiology of plantar ulceration in individuals with diabetes mellitus and peripheral neuropathy. Total contact casts and cast walker boots are common off-loading strategies to facilitate ulcer healing and prevent re-ulceration. The purpose of this study was to compare off-loading capabilities of these strategies with respect to plantar loading during barefoot walking. Methods Twenty-three individuals with diabetes, peripheral neuropathy, and plantar ulceration were randomly assigned to total contact cast (N=11) or removable cast walker boot (N=12). Each subject underwent plantar loading assessment walking barefoot and wearing the off-loading device. Analysis of covariance was used to compare loading patterns in the off-loading devices for the whole foot, hindfoot, midfoot, and forefoot while accounting for walking speed and barefoot loading. Findings For the foot as a whole, there were no differences in off-loading between the two techniques. Subjects wearing cast walker boots had greater reductions in forefoot peak pressure, pressure-time integral, maximum force, and force-time integral with respect to barefoot walking. Healing times were similar between groups, but a greater proportion of ulcers healed in total contact casting compared to cast walker boots. Interpretation In subjects with diabetes, peripheral neuropathy, and plantar ulceration, cast walker boots provided greater load reduction in the forefoot, the most frequent site of diabetic ulceration, though a greater proportion of subjects wearing total contact casts experienced ulcer healing. Taken together, the less effective ulcer healing in cast walker boots despite superior forefoot off-loading suggests an important role for patient compliance in ulcer healing. PMID:21496977

Gutekunst, David J.; Hastings, Mary K.; Bohnert, Kathryn L.; Strube, Michael J.; Sinacore, David R.

2011-01-01

188

The X-ray Telescope of CAST  

E-print Network

The Cern Axion Solar Telescope (CAST) is in operation and taking data since 2003. The main objective of the CAST experiment is to search for a hypothetical pseudoscalar boson, the axion, which might be produced in the core of the sun. The basic physics process CAST is based on is the time inverted Primakoff effect, by which an axion can be converted into a detectable photon in an external electromagnetic field. The resulting X-ray photons are expected to be thermally distributed between 1 and 7 keV. The most sensitive detector system of CAST is a pn-CCD detector combined with a Wolter I type X-ray mirror system. With the X-ray telescope of CAST a background reduction of more than 2 orders off magnitude is achieved, such that for the first time the axion photon coupling constant g_agg can be probed beyond the best astrophysical constraints g_agg < 1 x 10^-10 GeV^-1.

M. Kuster; H. Bräuninger; S. Cébrian; M. Davenport; C. Elefteriadis; J. Englhauser; H. Fischer; J. Franz; P. Friedrich; R. Hartmann; F. H. Heinsius; D. H. H. Hoffmann; G. Hoffmeister; J. N. Joux; D. Kang; K. Königsmann; R. Kotthaus; T. Papaevangelou; C. Lasseur; A. Lippitsch; G. Lutz; J. Morales; A. Rodríguez; L. Strüder; J. Vogel; K. Zioutas

2007-05-10

189

Biliary Cast Syndrome in an Opium Inhaler  

PubMed Central

Biliary cast syndrome (BCS) is an uncommon complication which is mostly described in orthotopic liver transplantation. However, BCS has also been reported rarely in non-liver transplant patients. We describe a male long-term opium inhaler with BCS who underwent successful endoscopic cast removal by balloon enteroscopy-guided endoscopic retrograde cholangiopancreatography. A 52-year-old man, who was a known case of opium addiction, presented with the chief complaint of epigastric pain for 1 week prior to admission. Routine laboratory evaluation revealed cholestatic liver enzyme elevation. A cholestatic pattern was seen in radiographic modalities. Endoscopic retrograde cholangiopancreatography showed a linear filling defect in the intra- and extrahepatic duct. A long biliary cast was successfully removed using an extractor balloon. After removal of the biliary cast the patient is receiving ursodeoxycholic acid and does not report any problem 4 months after treatment. It seems that biliary dyskinesia due to long-term opium use can be a predisposing factor for biliary cast formation. PMID:24163648

Dabiri, Reza; Aghdae, Hamid Asadzadeh; Rajabalinia, Hasan; Mohammad Alizadeh, Amir Houshang

2013-01-01

190

Biliary cast syndrome in an opium inhaler.  

PubMed

Biliary cast syndrome (BCS) is an uncommon complication which is mostly described in orthotopic liver transplantation. However, BCS has also been reported rarely in non-liver transplant patients. We describe a male long-term opium inhaler with BCS who underwent successful endoscopic cast removal by balloon enteroscopy-guided endoscopic retrograde cholangiopancreatography. A 52-year-old man, who was a known case of opium addiction, presented with the chief complaint of epigastric pain for 1 week prior to admission. Routine laboratory evaluation revealed cholestatic liver enzyme elevation. A cholestatic pattern was seen in radiographic modalities. Endoscopic retrograde cholangiopancreatography showed a linear filling defect in the intra- and extrahepatic duct. A long biliary cast was successfully removed using an extractor balloon. After removal of the biliary cast the patient is receiving ursodeoxycholic acid and does not report any problem 4 months after treatment. It seems that biliary dyskinesia due to long-term opium use can be a predisposing factor for biliary cast formation. PMID:24163648

Dabiri, Reza; Aghdae, Hamid Asadzadeh; Rajabalinia, Hasan; Mohammad Alizadeh, Amir Houshang

2013-01-01

191

The CAST experiment: status and perspectives  

E-print Network

The status of the solar axion search with the CERN Axion Solar Telescope (CAST) will be discussed. Results from the first part of CAST phase II where the magnet bores were filled with \\hefour gas at variable pressure in order to scan \\ma up to 0.4 eV will be presented. From the absence of excess X-rays when the magnet was pointing to the Sun, we set a typical upper limit on the axion-photon coupling of $\\gag \\lesssim 2.17 \\times10^{-10}$GeV$^{-1}$ at 95% CL for \\ma$CAST phase II. Expectations for sensibilities will be given. Near future perspectives as well as more long term options for a new helioscope experiment will be evoked.

Esther Ferrer Ribas; for the CAST Collaboration

2009-12-21

192

Composites for Advanced Space Transportation Systems (CASTS)  

NASA Technical Reports Server (NTRS)

A summary is given of the in-house and contract work accomplished under the CASTS Project. In July 1975 the CASTS Project was initiated to develop graphite fiber/polyimide matrix (GR/PI) composite structures with 589K (600 F) operational capability for application to aerospace vehicles. Major tasks include: (1) screening composites and adhesives, (2) developing fabrication procedures and specifications, (3) developing design allowables test methods and data, and (4) design and test of structural elements and construction of an aft body flap for the Space Shuttle Orbiter Vehicle which will be ground tested. Portions of the information are from ongoing research and must be considered preliminary. The CASTS Project is scheduled to be completed in September 1983.

Davis, J. G., Jr. (compiler)

1979-01-01

193

TiC reinforced cast chromium steels  

SciTech Connect

A series of new titanium carbide reinforced cast chromium steels were developed for wear applications. Objective of the program was to enhance wear resistant alloys and, if possible, improve mechanical properties. The new steels which were melted in a vacuum induction furnace contained 12 Cr, 3-5 Ti, 1-2 C in weight percent. Alloying with Ti changed the precipitate microstructure from Cr carbide to TiC dispersed in a martensitic matrix. Yield strength and impact resistance improved with Ti alloying. Wear rates of the cast Cr/TiC steels, (determined from high- and low-stress abrasion tests, erosion test, and scratch tests) were generally lower than both the as-cast and heat-treated AISI type 440°C steel and were often further reduced by increasing the Ti alloy concentration. The exceptions were the erosion test for which all materials had similar wear rate.

Dogan, Omer N.; Rawers, James C.; Hawk, Jeffrey A.; Schrems, Karol K.

2003-11-01

194

Fatigue of die cast zinc alloys  

SciTech Connect

The rotating bending fatigue limit of die cast zinc alloy 2, alloy 3, alloy 5, AcuZinc 5, and ZA-8 were determined as a part of an on-going program by ILZRO into the mechanical properties of die cast zinc. The stress-life (S-N) curves of alloys 3, 5, AcuZinc 5, and ZA-8 were determined previously. This presentation reports the results of the S-N curve for Alloy 2 and the calculated fatigue limits for all five alloys. During the previous stress-life testing, the samples were stopped at 10 million cycles and the fatigue limit for alloy 3, alloy 5, and AcuZinc 5 appeared to be higher and the fatigue limit for ZA-8 appeared to be lower than the values reported in the literature. This was further investigated in alloy 5 and ZA-8 by testing continuous cast bulk alloy 5 and ZA-8.

Schrems, K.K.; Dogan, O.N.; Goodwin, F.E. (International Lead Zinc Research Organization, Inc.)

2006-04-01

195

Cast Aluminum Alloy for High Temperature Applications  

NASA Technical Reports Server (NTRS)

Originally developed by NASA as high performance piston alloys to meet U.S. automotive legislation requiring low exhaust emission, the novel NASA alloys now offer dramatic increase in tensile strength for many other applications at elevated temperatures from 450 F (232 C) to about 750 F (400 C). It is an ideal low cost material for cast automotive components such as pistons, cylinder heads, cylinder liners, connecting rods, turbo chargers, impellers, actuators, brake calipers and rotors. It can be very economically produced from conventional permanent mold, sand casting or investment casting, with silicon content ranging from 6% to 18%. At high silicon levels, the alloy exhibits excellent dimensional stability, surface hardness and wear resistant properties.

Lee, Jonathan A.

2003-01-01

196

Hair casts due to a deodorant spray.  

PubMed

A 7-year-old girl presented with itching and greyish-white sleeve-like structures in her hair. After ruling out other possible causes for the symptoms, such as nits and dandruff, it was determined that the patient was affected by hair casts. These are small cylindrical structures resembling louse eggs that encircle individual scalp hairs and are easily movable along the hair shafts. It was concluded that she had induced the condition through misuse of a deodorant body spray. Scanning electron microscopy combined with electron dispersive X-ray analysis (X-ray microanalysis) of the hair casts showed the chemical nature of the structures. Some elements present in the composition of the ingredients of the deodorant spray, such as aluminium, chlorine, silicon, magnesium and carbon, were also present in this uncommon type of hair casts. PMID:16197431

Ena, Pasquale; Mazzarello, Vittorio; Chiarolini, Fausto

2005-11-01

197

Broken People: Caste Violence Against India's "Untouchables"  

NSDL National Science Digital Library

Even though "the imposition of social disabilities on persons by reason of their birth in certain castes" was legally abolished under India's constitution in 1950, "untouchability" is still practiced today in much of rural India. The "untouchable" caste -- or Dalits, which literally means "broken people" -- comprises over one-sixth of India's population, or 160 million people. This 310-page report, recently issued by Human Rights Watch (HRW), documents the discrimination and violence suffered by Dalits under the societal rule of higher-caste groups in the Indian states of Bihar, Tamil Nadu, Maharashtra, Andhra Pradesh, Karnataka, and Gujarat. The report also examines the government's role in preserving the status quo by thwarting peaceful social activism and failing to abolish exploitative labor practices through appropriate legislation.

198

Cold Cracking Development in AA7050 Direct Chill-Cast Billets under Various Casting Conditions  

NASA Astrophysics Data System (ADS)

Cold cracking is a potentially catastrophic phenomenon in direct chill (DC) casting of 7 xxx series aluminum alloys that leads to safety hazards and loss of production. The relatively low thermal conductivity and wide solidification temperature range in these alloys results in accumulation of residual thermal stress under nonuniform cooling conditions of the billets. In addition, such alloys show a severe loss in ductility below a critical temperature of 573 K (300 °C). This brittleness along with high stress concentration at the tips of voids and microcracks can lead to catastrophic failure. Casting process parameters affect the magnitude and distribution of stresses in the billet and increase the susceptibility of the material to cold cracking. In order to investigate the effect of casting process parameters such as casting speed, billet size, and water flow rate, thermomechanical simulations were applied using ALSIM5 casting simulation software. Among the studied casting process parameters, the increased billet size and high casting speed resulted in the most dramatic increase in residual stress level. Critical crack sizes that led to catastrophic failure were also calculated and are reported against process parameters.

Lalpoor, M.; Eskin, D. G.; Katgerman, L.

2010-09-01

199

Compound cast product and method for producing a compound cast product  

DOEpatents

A compound cast product is formed in a casting mold (14) having a mold cavity (16) sized and shaped to form the cast product. A plurality of injectors (24) is supported from a bottom side (26) of the casting mold (14). The injectors (24) are in fluid communication with the mold cavity (16) through the bottom side (26) of the casting mold (14). A molten material holder furnace (12) is located beneath the casting mold (14). The holder furnace (12) defines molten material receiving chambers (36) configured to separately contain supplies of two different molten materials (37, 38). The holder furnace (12) is positioned such that the injectors (24) extend downward into the receiving chamber (36). The receiving chamber (36) is separated into at least two different flow circuits (51, 52). A first molten material (37) is received in a first flow circuit (51), and a second molten material (38) is received into a second flow circuit (52). The first and second molten materials (37, 38) are injected into the mold cavity (16) by the injectors (24) acting against the force of gravity. The injectors (24) are positioned such that the first and second molten materials (37, 38) are injected into different areas of the mold cavity (16). The molten materials (37, 38) are allowed to solidify and the resulting compound cast product is removed from the mold cavity (16).

Meyer, Thomas N. (3987 Murray Highlands Cir., Murrysville, PA 15668-1747); Viswanathan, Srinath (1104 Albermarle La., Knoxville, TN 37923)

2002-09-17

200

Laser surface treatment of cast magnesium alloys  

Microsoft Academic Search

Purpose: The goal of this work was to investigate influence of laser treatment on structure and properties MCMgAl3Zn1, MCMgAl6Zn1, MCMgAl9Zn1 and MCMgAl12Zn1 cast magnesium alloys. Design\\/methodology\\/approach: Tests were made on the experimental MCMgAl3Zn1 MCMgAl6Zn1 MCMgAl9Zn1 and MCMgAl12Zn1 casting magnesium alloys. Laser treatment was made using the Rofin DL020 HPDL high power diode laser in the argon shield gas cover with

L. A. Dobrzañski; J. Domaga; T. Tañski; A. Klimpel; D. Janicki

201

Fluxing agent for metal cast joining  

DOEpatents

A method of joining an aluminum cast member to an aluminum component. The method includes the steps of coating a surface of an aluminum component with flux comprising cesium fluoride, placing the flux coated component in a mold, filling the mold with molten aluminum alloy, and allowing the molten aluminum alloy to solidify thereby joining a cast member to the aluminum component. The flux preferably includes aluminum fluoride and alumina. A particularly preferred flux includes about 60 wt. % CsF, about 30 wt. % AlF.sub.3, and about 10 wt. % Al.sub.2 O.sub.3.

Gunkel, Ronald W. (Lower Burrell, PA); Podey, Larry L. (Greensburg, PA); Meyer, Thomas N. (Murrysville, PA)

2002-11-05

202

Caste-Selective Pheromone Biosynthesis in Honeybees  

NASA Astrophysics Data System (ADS)

Queen and worker honeybees (Apis mellifera L.) produce a caste-related blend of functionalized 8- and 10-carbon fatty acids in their mandibular glands. The biological functions of these compounds match the queen's reproductive and the worker's nonreproductive roles in the colony. Studies with deuterated substrates revealed that the biosynthesis of these acids begins with stearic acid, which is hydroxylated at the 17th or 18th position. The 18-carbon hydroxy acid chains are shortened, and the resulting 10-carbon hydroxy acids are oxidized in a caste-selective manner, thereby determining many of the functional differences between queens and workers.

Plettner, Erika; Slessor, Keith N.; Winston, Mark L.; Oliver, James E.

1996-03-01

203

Identification of a pheromone regulating caste differentiation in termites  

E-print Network

Identification of a pheromone regulating caste differentiation in termites Kenji Matsuuraa,1 power. Identification of a volatile pheromone regulating caste differentiation in a termite provides verylittleprogressinthechemicalidentificationofinhibitoryqueen pheromones. In termites, which evolved eusociality independently of Hymenoptera, the existence

Alvarez, Nadir

204

Heritability of anthropometric phenotypes in caste populations of Visakhapatnam, India  

E-print Network

In this study, we used anthropometric data from six Andhra caste populations to examine heritability patterns of 23 anthropometric phenotypes (linear, craniofacial, and soft tissue measures) with special reference to caste differences. We obtained...

Arya, Rector; Duggirala, Ravindranath; Comuzzie, Anthony G.; Puppala, Sobah; Modem, Saileela; Busi, Bhaskara R.; Crawford, Michael H.

2002-06-01

205

19. Inside the cast house at Furnace A. Molten iron ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. Inside the cast house at Furnace A. Molten iron flowed into eight ladles. The furnace was cast (or tapped) six times each day. - Central Furnaces, 2650 Broadway, east bank of Cuyahoga River, Cleveland, Cuyahoga County, OH

206

INTERIOR VIEW OF DEBITEUSE STORAGE ROOM USED FOR UNFINISHED CASTS. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

INTERIOR VIEW OF DEBITEUSE STORAGE ROOM USED FOR UNFINISHED CASTS. EACH CAST WEIGHS 1200 POUNDS. - Chambers-McKee Window Glass Company, Debiteuse, Clay Avenue Extension, Jeannette, Westmoreland County, PA

207

OVERVIEW LOOKING SOUTH OF CONTAINMENT SYSTEM (TOP), SLAB CASTING MACHINE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

OVERVIEW LOOKING SOUTH OF CONTAINMENT SYSTEM (TOP), SLAB CASTING MACHINE AND RUN OUT WITH TRAVELING TORCH. MACHINE IS CASTING IN TWIN MOLD. - U.S. Steel, Fairfield Works, Continuous Caster, Fairfield, Jefferson County, AL

208

40 CFR 464.10 - Applicability; description of the aluminum casting subcategory.  

Code of Federal Regulations, 2012 CFR

...Applicability; description of the aluminum casting subcategory. 464.10...AND CASTING POINT SOURCE CATEGORY Aluminum Casting Subcategory § 464.10 Applicability; description of the aluminum casting subcategory. The...

2012-07-01

209

40 CFR 464.10 - Applicability; description of the aluminum casting subcategory.  

Code of Federal Regulations, 2011 CFR

...Applicability; description of the aluminum casting subcategory. 464.10...AND CASTING POINT SOURCE CATEGORY Aluminum Casting Subcategory § 464.10 Applicability; description of the aluminum casting subcategory. The...

2011-07-01

210

40 CFR 464.10 - Applicability; description of the aluminum casting subcategory.  

...Applicability; description of the aluminum casting subcategory. 464.10...AND CASTING POINT SOURCE CATEGORY Aluminum Casting Subcategory § 464.10 Applicability; description of the aluminum casting subcategory. The...

2014-07-01

211

40 CFR 464.10 - Applicability; description of the aluminum casting subcategory.  

Code of Federal Regulations, 2013 CFR

...Applicability; description of the aluminum casting subcategory. 464.10...AND CASTING POINT SOURCE CATEGORY Aluminum Casting Subcategory § 464.10 Applicability; description of the aluminum casting subcategory. The...

2013-07-01

212

40 CFR 464.10 - Applicability; description of the aluminum casting subcategory.  

Code of Federal Regulations, 2010 CFR

...Applicability; description of the aluminum casting subcategory. 464.10...AND CASTING POINT SOURCE CATEGORY Aluminum Casting Subcategory § 464.10 Applicability; description of the aluminum casting subcategory. The...

2010-07-01

213

21 CFR 888.5980 - Manual cast application and removal instrument.  

...nonpowered hand-held device intended to be used in applying or removing a cast. This generic type of device includes the cast knife, cast spreader, plaster saw, plaster dispenser, and casting stand. (b) Classification. Class I (general...

2014-04-01

214

21 CFR 888.5980 - Manual cast application and removal instrument.  

Code of Federal Regulations, 2010 CFR

...nonpowered hand-held device intended to be used in applying or removing a cast. This generic type of device includes the cast knife, cast spreader, plaster saw, plaster dispenser, and casting stand. (b) Classification. Class I (general...

2010-04-01

215

21 CFR 888.5980 - Manual cast application and removal instrument.  

Code of Federal Regulations, 2012 CFR

...nonpowered hand-held device intended to be used in applying or removing a cast. This generic type of device includes the cast knife, cast spreader, plaster saw, plaster dispenser, and casting stand. (b) Classification. Class I (general...

2012-04-01

216

75 FR 70900 - Certain Iron Construction Castings From Brazil, Canada, and the People's Republic of China...  

Federal Register 2010, 2011, 2012, 2013

...A-122-503, A-570-502] Certain Iron Construction Castings From Brazil, Canada...antidumping duty (``AD'') orders on certain iron construction castings (``castings...the orders to be revoked. See Certain Iron Construction Castings From Brazil,...

2010-11-19

217

40 CFR 464.40 - Applicability; description of the zinc casting subcategory.  

Code of Federal Regulations, 2013 CFR

...false Applicability; description of the zinc casting subcategory. 464.40 Section...MOLDING AND CASTING POINT SOURCE CATEGORY Zinc Casting Subcategory § 464.40 Applicability; description of the zinc casting subcategory. The...

2013-07-01

218

40 CFR 464.40 - Applicability; description of the zinc casting subcategory.  

Code of Federal Regulations, 2012 CFR

...false Applicability; description of the zinc casting subcategory. 464.40 Section...MOLDING AND CASTING POINT SOURCE CATEGORY Zinc Casting Subcategory § 464.40 Applicability; description of the zinc casting subcategory. The...

2012-07-01

219

40 CFR 464.40 - Applicability; description of the zinc casting subcategory.  

...false Applicability; description of the zinc casting subcategory. 464.40 Section...MOLDING AND CASTING POINT SOURCE CATEGORY Zinc Casting Subcategory § 464.40 Applicability; description of the zinc casting subcategory. The...

2014-07-01

220

40 CFR 464.20 - Applicability; description of the copper casting subcategory.  

... Applicability; description of the copper casting subcategory. 464.20 Section...MOLDING AND CASTING POINT SOURCE CATEGORY Copper Casting Subcategory § 464.20 Applicability; description of the copper casting subcategory. The...

2014-07-01

221

Twin-roll strip casting of magnesium alloys in China  

Microsoft Academic Search

The development status of twin-roll strip casting for magnesium alloys in China was summarized as well as the new progress when several kinds of twin-roll strip casting technologies were developed and used. Horizontal twin-roll casting (HTRC) of magnesium alloys has attracted much attention and has been industrialized in China. Vertical twin roll casting (VTRC) of the magnesium alloys can reach

Pei-dao DING; Fu-sheng PAN; Bin JIANG; Jian WANG; Hua-lun LI; Jiang-cai WU; Yue-wang XU; Yu WEN

2008-01-01

222

Choice of Steel for Large Castings  

Microsoft Academic Search

Steel of grade 15Kh3M1FTsL with relatively simple alloying set is suggested. The steel possesses high mechanical properties and a low cold-shortness threshold. Joint inoculation of cast low-carbon Cr – Mo steel with vanadium and zirconium is shown to have advantages.

I. A. Borisov

2004-01-01

223

Casting the Spirit: A Handmade Legacy  

ERIC Educational Resources Information Center

This article discusses how an art therapist working in a hospital palliative care unit has incorporated a ritual of hand casting to help bring closure to dying patients and family members who are grieving as death approaches. The finished hand sculptures depict the hands of the patients and, sometimes, of their loved ones. They are faithful and…

Rutenberg, Mona

2008-01-01

224

AcademiCast Transcript Texas Tech University  

E-print Network

after the Civil War. AcademiCast sat down with Rose to hear more about Rose, who wrote "The Reckoning." Rose's book tells of how law and order came the book in his own words. Rose: The area from, say Fredericksburg

Rock, Chris

225

Ultrasonic transducers for continuous-cast billets  

Microsoft Academic Search

In order to detect internal defects larger than 20 mm in continuous-cast steel billets, our team investigated the frequency and beam width of ultrasonic transducers. Internal defects larger than 20 mm cannot be detected by measuring defect echoes because large defects absorb ultrasonic wave energy. So, large defects should be detected by means of the energy loss. The energy loss

Byoung-Chul Shin; Jeong-Rock Kwon

1995-01-01

226

Adaptive robust stabilization of continuous casting  

Microsoft Academic Search

Continuous casting processes can suffer from a disturbance effect, called “dynamic bulging”, that causes large oscillations of the mold level, significantly reduces the quality of the final product and may cause instability and damages. In this paper this effect is analyzed and a new integrated control strategy is presented capable of significantly reduce the dynamic bulging without slowing down the

Christian Furtmüller; Patrizio Colaneri; Luigi del Re

227

Variable-structure control of casting processes  

Microsoft Academic Search

The paper is concerned with the problem of regulating the molten metal level in the mold of a continuous casting plant despite the continual perturbations caused by mold shaking and the occasional perturbations due to the sudden uncloggings of the nozzle through which the liquid is poured into the mold. To deal with both kinds of perturbations, two distinct controllers

Wiesaw Krajewski; Stefano Miani; Umberto Viaro

2010-01-01

228

Carburizer Effect on Cast Iron Solidification  

NASA Astrophysics Data System (ADS)

This paper presents the effect of carburizing materials on cast iron solidification and crystallization. The studies consisted of cast iron preparation from steel scrap and different carburizers. For a comparison, pig iron was exclusively used in a solid charge. Crystallization analysis revealed the influence of the carburizer material on the crystallization curves as well as differences in the solidification paths of cast iron prepared with the use of different charge materials. The carburizers' influence on undercooling during the eutectic crystallization process was analyzed. The lowest undercooling rate was recorded for the melt with pig iron, then for synthetic graphite, natural graphite, anthracite, and petroleum coke (the highest undercooling rate). So a hypothesis was formulated that eutectic cells are created most effectively with the presence of carbon from pig iron (the highest nucleation potential), and then for the graphite materials (crystallographic similarity with the carbon precipitation in the cast iron). The most difficult eutectic crystallization is for anthracite and petroleum coke (higher undercooling is necessary). This knowledge can be crucial when the foundry plant is going to change the solid charge composition replacing the pig iron by steel scrap and the recarburization process.

Janerka, Krzysztof; Kondracki, Marcin; Jezierski, Jan; Szajnar, Jan; Stawarz, Marcin

2014-06-01

229

Material accountancy for metallic fuel pin casting  

Microsoft Academic Search

The operation of the Fuel Conditioning Facility (FCF) is based on the electrometallurgical processing of spent metallic reactor fuel. The pin casting operation, although only one of several operations in FCF, was the first to be on-line. As such, it has served to demonstrate the material accountancy system in many of its facets. This paper details, for the operation of

R. G. Bucher; Y. Orechwa; J. C. Beitel

1995-01-01

230

Cast shadow segmentation using invariant color features  

Microsoft Academic Search

Shadows are integral parts of natural scenes and one of the elements contributing to nat- uralness of synthetic scenes. In many image analysis and interpretation applications, shadows interfere with fundamental tasks such as object extraction and description. For this reason, shadow segmentation is an important step in image analysis. In this paper, we propose a new cast shadow segmentation algorithm

Elena Salvador; Andrea Cavallaro; Touradj Ebrahimi

2004-01-01

231

CAST: Collaborative Agents for Simulating Teamwork  

Microsoft Academic Search

Psychological studies on teamwork have shown that an effective team often can anticipate information needs of teammates based on a shared mental model. Existing multi-agent models for teamwork are limited in their ability to support proactive information exchange among teammates. To address this issue, we have developed and implemented a multi-agent architecture called CAST that simulates teamwork and supports proactive

John Yen; Jianwen Yin; Thomas R. Ioerger; Michael S. Miller; Dianxiang Xu; Richard A. Volz

2001-01-01

232

Templates Aid Removal Of Defects From Castings  

NASA Technical Reports Server (NTRS)

Templates used to correlate defects in castings with local wall thicknesses. Placed on part to be inspected after coated with penetrant dye. Positions of colored spots (indicative of defects) noted. Ultrasonic inspector measures thickness of wall at unacceptable defects only - overall inspection not necessary.

Hendrickson, Robert G.

1992-01-01

233

An Introduction to ToxCast?  

EPA Science Inventory

ToxCast? is a chemical prioritization research program to develop the ability to forecast toxicity using bioactivity profiling. The point is to use results in a variety of in vitro and rapid non-mammalian in vivo assays to explore effects at different toxicity targets. The desi...

234

An Update on ToxCast?  

EPA Science Inventory

In its first phase, ToxCast? is profiling over 300 well-characterized chemicals (primarily pesticides) in over 400 HTS endpoints. These endpoints include biochemical assays of protein function, cell-based transcriptional reporter assays, multi-cell interaction assays, transcripto...

235

Modal Vibration Analysis of Large Castings  

NASA Technical Reports Server (NTRS)

The art of experimental modal vibration analysis (MVA) has been extended to apply to large castings. This extension was made to enable the use of experimental MVA as a relatively inexpensive, simple means of assessing the internal structural integrity of tread shoes of crawler transporters used to move spacecraft to the launch pad at Kennedy Space Center. Each tread shoe is made from cast iron and weighs about a ton (has a mass .907 kg). The present extended version of experimental MVA could also be applied to other large castings. It could be especially useful to manufacturers as a means of rapidly discriminating against large castings that contain unacceptably large concentrations of internal defects. The use of experimental MVA to assess structural integrity is not new. What are new here are those aspects of the extension of experimental MVA that pertain to the application of MVA to objects so massive that it may not be practical or cost effective to mount them in special test fixtures that impose special test boundary conditions to test them in place under normal conditions of use.

Werlink, Rudolph J.; Margasahayam, Ravi N.

2009-01-01

236

Bracing versus casting in ankle fractures.  

PubMed

Casting and splinting techniques for treating patients with fractures have been used for centuries. Functional bracing after ankle fracture has recently been utilized in an effort to avoid the atrophy and stiffness sometimes associated with casting; functional bracing allows for early mobilization of the ankle joint during recovery. Our review investigated the published literature comparing bracing with casting after ankle fracture. Studies examining both operatively and nonoperatively treated ankle fractures were included. There is minimal evidence supporting the use of functional bracing over cast immobilization to improve functional outcome, range of motion, swelling, or post-traumatic arthrosis after ankle fracture in the long term. The primary benefits of functional bracing are the potential to return to work earlier and bracing may facilitate activities of daily living, such as bathing and dressing. In addition, there may be a decreased patient risk of developing deep vein thrombosis due to immobilization. However, there is an increased risk of wound infection when using a brace after open reduction and internal fixation of an unstable ankle fracture. Functional bracing can be used for treating stable and postoperative ankle fractures in compliant patients to potentially expedite and facilitate the recovery process. PMID:25419889

Drakos, Mark C; Murphy, Conor I

2014-11-01

237

Arsenic Removal from Drinking Water - Web cast  

EPA Science Inventory

Web cast presentation covered six topics: (1) Arsenic Chemistry, (2) Technology Selection/Arsenic Demonstration Program, (3) Case Study 1, (4) Caser Study 2, (5) Case Study 3, and (6) Media Regeneration Project. The presentation was considered a training session and consist of m...

238

New methods and materials for molding and casting ice formations  

NASA Technical Reports Server (NTRS)

This study was designed to find improved materials and techniques for molding and casting natural or simulated ice shapes that could replace the wax and plaster method. By utilizing modern molding and casting materials and techniques, a new methodology was developed that provides excellent reproduction, low-temperature capability, and reasonable turnaround time. The resulting casts are accurate and tough.

Reehorst, Andrew L.; Richter, G. Paul

1987-01-01

239

Squeeze casting of magnesium alloys and their composites  

Microsoft Academic Search

Squeeze casting, also known as liquid metal forging, extrusion casting and pressure crystallization, is a process in which molten metal soldifies in a die under an applied high pressure. The concept of squeeze casting was invented in Russia over 100 years ago. Later the process was exploited in North America, Japan and Europe to produce various automotive components. With the

H. Hu

1998-01-01

240

New developments in assessing hot tearing in magnesium alloy castings  

Microsoft Academic Search

High performance magnesium parts produced by permanent mold casting often exhibit hot tear defects. Theoretical prediction of hot tears in magnesium alloys has reached only limited success and further research is necessary to enhance understanding of the fundamental mechanisms associated with the formation of this defect.In this research, numerical modeling of the casting process enabled identification of casting regions susceptible

L. Bichler; C. Ravindran

2010-01-01

241

Sensor-based assessment of cast placement and removal.  

PubMed

Appropriate pressure during the application of a cast is critical to provide adequate stabilization of fractures. Force-sensing resistors (FSR) were used to measure pressure during cast placement and removal. The data demonstrated a signature pattern of skin pressure during the different steps of cast placement and removal. This reproducible signal provides validity evidence for our model. PMID:24732518

Maag, Anne-Lise D; Laufer, Shlomi; Kwan, Calvin; Cohen, Elaine R; Lenhart, Rachel L; Stork, Natalie C; Halanski, Matthew A; Pugh, Carla M

2014-01-01

242

Clean Cast Steel Technology - Machinability and Technology Transfer  

SciTech Connect

There were two main tasks in the Clean Cast Steel Technology - Machinability and Technology Transfer Project. These were (1) determine the processing facts that control the machinability of cast steel and (2) determine the ability of ladle stirring to homogenize ladle temperature, reduce the tap and pouring temperatures, and reduce casting scrap.

C. E. Bates; J. A. Griffin

2000-05-01

243

Probing eV-scale axions with CAST  

Microsoft Academic Search

We have searched for solar axions or other pseudoscalar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup. Whereas we previously have reported results from CAST with evacuated magnet bores (Phase I), setting limits on lower mass axions, here we report results from CAST where the magnet bores were filled with 4He gas (Phase

E. Arik; S. Aune; D. Autiero; K. Barth; A. Belov; B. Beltrán; S. Borghi; G. Bourlis; F. S. Boydag; H. Bräuninger; J. M. Carmona; S. Cebrián; S. A. Cetin; J. I. Collar; T. Dafni; M. Davenport; L. Di Lella; O. B. Dogan; C. Eleftheriadis; N. Elias; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; P. Friedrich; J. Franz; J. Galán; T. Geralis; I. Giomataris; S. Gninenko; H. Gómez; R. Hartmann; M. Hasinoff; F. H. Heinsius; I. Hikmet; D. H. H. Hoffmann; I. G. Irastorza; J. Jacoby; K. Jakovcic; D. Kang; K. Königsmann; R. Kotthaus; M. Krcmar; K. Kousouris; M. Kuster; B. Lakic; C. Lasseur; A. Liolios; A. Ljubicic; G. Lutz; G. Luzón; D. Miller; J. Morales; T. Niinikoski; A. Nordt; A. Ortiz; T. Papaevangelou; M. J. Pivovaroff; A. Placci; G. Raffelt; H. Riege; A. Rodríguez; J. Ruz; I. Savvidis; Y. Semertzidis; P. Serpico; R. Soufli; L. Stewart; K. van Bibber; J. Villar; J. Vogel; L. Walckiers; K. Zioutas

2009-01-01

244

49 CFR 192.755 - Protecting cast-iron pipelines.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Protecting cast-iron pipelines. 192.755 Section 192...Maintenance § 192.755 Protecting cast-iron pipelines. When an operator has knowledge...support for a segment of a buried cast-iron pipeline is disturbed: (a)...

2011-10-01

245

46 CFR 153.239 - Use of cast iron.  

...2014-10-01 2014-10-01 false Use of cast iron. 153.239 Section 153.239 Shipping COAST...Cargo Containment Systems § 153.239 Use of cast iron. (a) Cast iron used in a cargo containment system must meet the...

2014-10-01

246

46 CFR 153.239 - Use of cast iron.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Use of cast iron. 153.239 Section 153.239 Shipping COAST...Cargo Containment Systems § 153.239 Use of cast iron. (a) Cast iron used in a cargo containment system must meet the...

2010-10-01

247

46 CFR 153.239 - Use of cast iron.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Use of cast iron. 153.239 Section 153.239 Shipping COAST...Cargo Containment Systems § 153.239 Use of cast iron. (a) Cast iron used in a cargo containment system must meet the...

2013-10-01

248

49 CFR 192.755 - Protecting cast-iron pipelines.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Protecting cast-iron pipelines. 192.755 Section 192...Maintenance § 192.755 Protecting cast-iron pipelines. When an operator has knowledge...support for a segment of a buried cast-iron pipeline is disturbed: (a)...

2010-10-01

249

49 CFR 192.755 - Protecting cast-iron pipelines.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Protecting cast-iron pipelines. 192.755 Section 192...Maintenance § 192.755 Protecting cast-iron pipelines. When an operator has knowledge...support for a segment of a buried cast-iron pipeline is disturbed: (a)...

2013-10-01

250

46 CFR 153.239 - Use of cast iron.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Use of cast iron. 153.239 Section 153.239 Shipping COAST...Cargo Containment Systems § 153.239 Use of cast iron. (a) Cast iron used in a cargo containment system must meet the...

2011-10-01

251

46 CFR 153.239 - Use of cast iron.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Use of cast iron. 153.239 Section 153.239 Shipping COAST...Cargo Containment Systems § 153.239 Use of cast iron. (a) Cast iron used in a cargo containment system must meet the...

2012-10-01

252

49 CFR 192.275 - Cast iron pipe.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Cast iron pipe. 192.275 Section 192.275...Other Than by Welding § 192.275 Cast iron pipe. (a) Each caulked bell and spigot joint in cast iron pipe must be sealed with mechanical...

2013-10-01

253

49 CFR 192.755 - Protecting cast-iron pipelines.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Protecting cast-iron pipelines. 192.755 Section 192...Maintenance § 192.755 Protecting cast-iron pipelines. When an operator has knowledge...support for a segment of a buried cast-iron pipeline is disturbed: (a)...

2012-10-01

254

Wear-corrosion study of white cast irons  

Microsoft Academic Search

A US Bureau of Mines study to quantify synergism between wear and corrosion of white cast iron in an aqueous sulfate environment was conducted using a rotating cylinder-anvil apparatus. A commercial 13.5% Cr white cast iron sample and the individual constituents of a white cast iron were studied to determine the role of each phase in the degradation processes of

S. W. Watson; B. W. Madsen; S. D. Cramer

1995-01-01

255

A Fourier Theory for Cast Shadows Ravi Ramamoorthi1  

E-print Network

A Fourier Theory for Cast Shadows Ravi Ramamoorthi1 , Melissa Koudelka2 , and Peter Belhumeur1 1.koudelka@yale.edu Abstract. Cast shadows can be significant in many computer vision applications such as lighting non-local interactions in non-convex regions, making formal analysis difficult. While general cast

O'Brien, James F.

256

Morphological castes in a vertebrate M. J. O'Riain*  

E-print Network

Morphological castes in a vertebrate M. J. O'Riain* , J. U. M. Jarvis , R. Alexander§ , R of reproduction in females. This is the only known example of morphological castes in a vertebrate and is distinct breeding vertebrates. The evolution of castes in a mammal and insects represents a striking example

Danchin, Etienne

257

Illumination Recovery from Image with Cast Shadows via Sparse Representation  

E-print Network

1 Illumination Recovery from Image with Cast Shadows via Sparse Representation Xue Mei, Haibin Ling representation for recovering the illumination of a scene from a single image with cast shadows, given the geometry of the scene. The images with cast shadows can be quite complex and therefore cannot be well

Ling, Haibin

258

49 CFR 192.755 - Protecting cast-iron pipelines.  

...2014-10-01 2014-10-01 false Protecting cast-iron pipelines. 192.755 Section... Maintenance § 192.755 Protecting cast-iron pipelines. When an operator...that the support for a segment of a buried cast-iron pipeline is disturbed:...

2014-10-01

259

Converge-Cast with MIMO , Xinbing Wang3  

E-print Network

Converge-Cast with MIMO Luoyi Fu1 , Yi Qin2 , Xinbing Wang3 , Xue Liu4 1,2,3 Depart. of Electronic, called converge-cast, where each of the n nodes in the network act as a destination with k ran- domly two many-to-one cooperative schemes under converge-cast for both static and mobile ad hoc networks

Wang, Xinbing

260

49 CFR 192.275 - Cast iron pipe.  

...2014-10-01 2014-10-01 false Cast iron pipe. 192.275 Section 192...Materials Other Than by Welding § 192.275 Cast iron pipe. (a) Each caulked bell and spigot joint in cast iron pipe must be sealed with...

2014-10-01

261

25 CFR 217.6 - Method of casting votes.  

Code of Federal Regulations, 2013 CFR

...superintendent in writing of the number of votes cast for and against the proposed or alternative...of the joint managers fails or refuses to cast his votes and to notify the superintendent...that such joint managers' votes have been cast against the proposed solution or...

2013-04-01

262

25 CFR 217.6 - Method of casting votes.  

...superintendent in writing of the number of votes cast for and against the proposed or alternative...of the joint managers fails or refuses to cast his votes and to notify the superintendent...that such joint managers' votes have been cast against the proposed solution or...

2014-04-01

263

Beam casting implicit surfaces on the GPU with interval arithmetic  

E-print Network

Beam casting implicit surfaces on the GPU with interval arithmetic Francisco Ganacim, Luiz Henrique, Brazil Abstract--We present a GPU-based beam-casting method for rendering implicit surfaces in real time. INTRODUCTION Rendering surfaces with ray casting is perhaps the clearest example of a potentially

264

The effect of hot isostatic pressing on cast aluminum  

NASA Astrophysics Data System (ADS)

Aluminum-silicon alloys are the most important commercial aluminum casting alloys, primarily because of their superior casting characteristics. This article discusses the effect of hot isostatic pressing on the mechanical properties of cast aluminum alloy A356. The effect of low-cost Densal hotisostatic pressing is also examined.

Lei, C. S. C.; Frazier, W. E.; Lee, E. W.

1997-11-01

265

APPROXIMATION OF A TWOPHASE CONTINUOUS CASTING STEFAN PROBLEM  

E-print Network

APPROXIMATION OF A TWO­PHASE CONTINUOUS CASTING STEFAN PROBLEM Zhiming Chen \\Lambda Lishang Jiang y Abstract. The continuous casting Stefan problem is a mathematical model describing the solidification with convection of a material being cast continuously with a prescribed velocity. We propose a practical piecewise

266

TriggerCast: Enabling Wireless Constructive , Dapeng Cheng  

E-print Network

TriggerCast: Enabling Wireless Constructive Collisions Yin Wang , Yuan He§ , Dapeng Cheng , Yunhao redefine CI and propose TriggerCast, a practical wireless architecture which ensures concurrent. TriggerCast has 95th percentile synchronization errors of at most 250ns. Extensive experiments

Li, Xiang-Yang

267

Composite Materials Processing of Cast Iron and Ceramics Using Compo-Casting Technology  

NASA Astrophysics Data System (ADS)

The compo-casting technology of ceramics and cast iron is expected to be one of the major casting technologies that can expand the application fields of cast iron. This technique allows the heat energy of the molten metal to be utilized to produce cast iron products which are added with functions of ceramic materials. The largest problem in compo-casting technology is generation of cracks caused by thermal shock. Although this crack generation can be prevented by reducing the thermal stress by means of preheating ceramics, the necessary preheating temperature is considerably high and its precise controlling is difficult at the practical foundry working sites. In this study, we tried to numerically predict the critical preheating temperature of ceramics using the thermal stress analysis in unsteady heat transfer and the Newman's diagram, and found that the preheating of ceramics to reduce thermal stress could be substituted with placing an appropriate cast iron cover around the ceramics. Excellent results were obtained by using a method whereby a ceramic bar was covered with a flake graphite cast iron cover and fixed in a sand mold and then molten metal was poured. Then, two or three ceramics were examined at the same time under the compocasting condition. As a result, three specimens could be done at the same time by adjusting the cover space to 15mm. Moreover, irregular shape ceramics were examined under the compocasting condition. As a result, the compocasting could be done by devising the cover shape. In each condition, it was confirmed that the cover shape made from the analytical result was effective to the compocasting by doing the thermometry of the specimens.

Tomita, Yoshihiro; Sumimoto, Haruyoshi

268

A dynamic control water distribution model of steel in continuous casting  

Microsoft Academic Search

After investigation in many continuous casting shop of steel, a dynamic water distribution model is proposed for flexible control on secondary cooling in continuous casting. In this model, the water cooling intensity is determined by the model casting speed instead of the real casting speed. When the casting speed is steady, the model casting speed is equal to the real

Jian-Xun Fu; Weng-Sing Hwang; De-Chang Tsai; MingHsiu Tsai; Chien-Hsun Wang

2012-01-01

269

Fabrication of fiber reinforced metal matrix composites by squeeze casting technology  

Microsoft Academic Search

Squeeze forming process is a special casting technique that combines the advantages of traditional high pressure die casting, gravity permanent mold die casting and common forging technology. It is a relatively new casting process. It is otherwise called squeeze forming, liquid forging, liquid pressing, extrusion casting, liquid metal stamping, pressure crystallization and corthias casting. The above said process was first

T. R. Vijayaram; S. Sulaiman; A. M. S. Hamouda; M. H. M. Ahmad

2006-01-01

270

Characterization of Bimetallic Castings with an Austenitic Working Surface Layer and an Unalloyed Cast Steel Base  

NASA Astrophysics Data System (ADS)

The paper presents the technology of bimetallic castings based on the founding method of layer coating directly in the cast process of the so-called method of mold cavity preparation. The prepared castings consist of two fundamental parts, i.e., the base and the working surface layer. The base part of the bimetallic casting is typical foundry material, i.e., unalloyed cast steel, whereas the working layer is a plate of austenitic alloy steel sort X2CrNi 18-9. The quality of the joint between the base part and the working layer was evaluated on the basis of ultrasonic non-destructive testing and structure examinations containing metallographic macro- and microscopic studies with the use of a light microscope (LOM) with microhardness measurements and a scanning electron microscope (SEM) with microanalysis of the chemical composition (energy dispersive spectroscopy—EDS). On the basis of the obtained results it was confirmed that the decisive phenomena needed to create a permanent joint between the two components of the bimetallic casting are carbon and heat transport in the direction from the high-carbon and hot base material which was poured into the mold in the form of liquid metal to the low-carbon and cold material of the working layer which was placed in the mold cavity in the form of a monolithic insert.

Wróbel, Tomasz

2014-05-01

271

B.G. Thomas, "Continuous Casting", Yearbook of Science and Technology, McGraw-Hill, 2004. 1 Continuous Casting (metallurgy)  

E-print Network

B.G. Thomas, "Continuous Casting", Yearbook of Science and Technology, McGraw-Hill, 2004. 1 Continuous Casting (metallurgy) B.G. Thomas Mechanical & Industrial Engineering University of Illinois at Urbana-Champaign 217-333-6919; bgthomas@uiuc.edu Continuous casting is used to mass produce basic metals

Thomas, Brian G.

272

ASM Handbook, Volume 15, Casting, Division 4: Modeling and Analysis of Casting Processes, American Society of Metals (2008) 449-461  

E-print Network

used to solve them, and a few examples of recent applications in shape castings and continuous castingASM Handbook, Volume 15, Casting, Division 4: Modeling and Analysis of Casting Processes, American the quality of the final product that is desired by the casting industry. Accurate calculation

Paris-Sud XI, Université de

273

Caste in 21st Century India: Competing Narratives  

PubMed Central

Recent debates regarding inclusion of caste in 2011 Census have raised questions about whether caste still matters in modern India. Ethnographic studies of the mid-20th century identified a variety of dimensions along which caste differentiation occurs. At the same time, whether this differentiation translates into hierarchy remains a contentious issue as does the persistence of caste, given the economic changes of the past two decades. Using data from a nationally representative survey of 41,554 households conducted in 2005, this paper examines the relationship between social background and different dimensions of well-being. The results suggest continued persistence of caste disparities in education, income and social networks. PMID:22736803

Desai, Sonalde; Dubey, Amaresh

2012-01-01

274

[Application to dental casting machine of the rapid heating infrared image furnace (author's transl)].  

PubMed

The authors tried to manufacture a casting machine in dentistry by application of the infrared image furnace with a high heating speed and an easy control of a heating temperature. This machine melts an alloy in a carbon crucible set in the furnace, held in the horizontal position. Then, the furnace is turned to the vertical position to drop a melted alloy on the casting mold, and the alloy is cast in the mold by the pressure of Argon gas. The functions of trial casting machine were follows. 1. The trial casting machine was capable of heating to 1250 degrees C within one minute under 4 kW electric power. 2. The castability of the 20% Au-Pd-Ag commercial alloy cast in all casting conditions by the trial casting machine was higher than that of Thermotrol D-2 automatic centrifugal casting machine. 3. Castings of the trial casting machine showed higher tensile strength and elongation than those of the centrifugal casting machine, and the deviation of values got by the trial casting machine was small. In particular, some casting of the trial casting machine showed three times or over elongation values as compared with those of the centrifugal casting machine. 4. When casting conditions (casting temperature, casting pressure) of the trial casting machine changed, the physical properties of castings did not change so much. However, when the mold was not prevented from heating by the furnace in casting, the elongation of castings increased. PMID:7017037

Etchu, Y; Noguchi, H

1980-10-01

275

Metallic Fuel Casting Development and Parameter Optimization Simulations  

SciTech Connect

One of the advantages of metallic fuel is the abilility to cast the fuel slugs to near net shape with little additional processing. However, the high aspect ratio of the fuel is not ideal for casting. EBR-II fuel was cast using counter gravity injection casting (CGIC) but, concerns have been raised concerning the feasibility of this process for americium bearing alloys. The Fuel Cycle Research and Development program has begun developing gravity casting techniques suitable for fuel production. Compared to CGIC gravity casting does not require a large heel that then is recycled, does not require application of a vacuum during melting, and is conducive to re-usable molds. Development has included fabrication of two separate benchscale, approximately 300 grams, systems. To shorten development time computer simulations have been used to ensure mold and crucible designs are feasible and to identify which fluid properties most affect casting behavior and therefore require more characterization.

R.S. Fielding; J. Crapps; C. Unal; J.R. Kennedy

2013-03-01

276

An investigation of squeeze-cast alloy 718  

NASA Technical Reports Server (NTRS)

Alloy 718 billets produced by the squeeze-cast process have been evaluated for use as potential replacements for propulsion engine components which are normally produced from forgings. Alloy 718 billets were produced using various processing conditions. Structural characterizations were performed on 'as-cast' billets. As-cast billets were then homogenized and solution treated and aged according to conventional heat-treatment practices for this alloy. Mechanical property evaluations were performed on heat-treated billets. As-cast macrostructures and microstructures varied with squeeze-cast processing parameters. Mechanical properties varied with squeeze-cast processing parameters and heat treatments. One billet exhibited a defect free, refined microstructure, with mechanical properties approaching those of wrought alloy 718 bar, confirming the feasibility of squeeze-casting alloy 718. However, further process optimization is required, and further structural and mechanical property improvements are expected with process optimization.

Gamwell, W. R.

1993-01-01

277

Genetic evidence on the origins of Indian caste populations.  

PubMed

The origins and affinities of the approximately 1 billion people living on the subcontinent of India have long been contested. This is owing, in part, to the many different waves of immigrants that have influenced the genetic structure of India. In the most recent of these waves, Indo-European-speaking people from West Eurasia entered India from the Northwest and diffused throughout the subcontinent. They purportedly admixed with or displaced indigenous Dravidic-speaking populations. Subsequently they may have established the Hindu caste system and placed themselves primarily in castes of higher rank. To explore the impact of West Eurasians on contemporary Indian caste populations, we compared mtDNA (400 bp of hypervariable region 1 and 14 restriction site polymorphisms) and Y-chromosome (20 biallelic polymorphisms and 5 short tandem repeats) variation in approximately 265 males from eight castes of different rank to approximately 750 Africans, Asians, Europeans, and other Indians. For maternally inherited mtDNA, each caste is most similar to Asians. However, 20%-30% of Indian mtDNA haplotypes belong to West Eurasian haplogroups, and the frequency of these haplotypes is proportional to caste rank, the highest frequency of West Eurasian haplotypes being found in the upper castes. In contrast, for paternally inherited Y-chromosome variation each caste is more similar to Europeans than to Asians. Moreover, the affinity to Europeans is proportionate to caste rank, the upper castes being most similar to Europeans, particularly East Europeans. These findings are consistent with greater West Eurasian male admixture with castes of higher rank. Nevertheless, the mitochondrial genome and the Y chromosome each represents only a single haploid locus and is more susceptible to large stochastic variation, bottlenecks, and selective sweeps. Thus, to increase the power of our analysis, we assayed 40 independent, biparentally inherited autosomal loci (1 LINE-1 and 39 Alu elements) in all of the caste and continental populations (approximately 600 individuals). Analysis of these data demonstrated that the upper castes have a higher affinity to Europeans than to Asians, and the upper castes are significantly more similar to Europeans than are the lower castes. Collectively, all five datasets show a trend toward upper castes being more similar to Europeans, whereas lower castes are more similar to Asians. We conclude that Indian castes are most likely to be of proto-Asian origin with West Eurasian admixture resulting in rank-related and sex-specific differences in the genetic affinities of castes to Asians and Europeans. PMID:11381027

Bamshad, M; Kivisild, T; Watkins, W S; Dixon, M E; Ricker, C E; Rao, B B; Naidu, J M; Prasad, B V; Reddy, P G; Rasanayagam, A; Papiha, S S; Villems, R; Redd, A J; Hammer, M F; Nguyen, S V; Carroll, M L; Batzer, M A; Jorde, L B

2001-06-01

278

Volatile Species Retention During Metallic Fuel Casting  

SciTech Connect

Metallic nuclear fuels are candidate transmutation fuel forms for advanced fuel cycles. Through the operation of the Experimental Breeder Reactor II metallic nuclear fuels have been shown to be robust and easily manufactured. However, concerns have been raised concerning loss of americium during the casting process because of its high vapor pressure. In order to address these concerns a gaseous diffusion model was developed and a series of experiments using both manganese and samarium as surrogates for americium were conducted. The modeling results showed that volatility losses can be controlled to essentially no losses with a modest overpressure. Experimental results also showed volatile species retention down to no detectable losses through overpressure, although the loss values varied from the model results the same trend was seen. Bases on these results it is very probably that americium losses through volatility can be controlled to no detectable losses through application of a modest overpressure during casting.

Randall S. Fielding; Douglas L. Proter

2013-10-01

279

Volatile species retention during metallic fuel casting  

NASA Astrophysics Data System (ADS)

Metallic nuclear fuels are candidate transmutation fuel forms for advanced fuel cycles. Through the operation of the Experimental Breeder Reactor II metallic nuclear fuels have been shown to be robust and easily manufactured. However, concerns have been raised concerning loss of americium during the casting process because of its high vapor pressure. In order to address these concerns a gaseous diffusion model was developed and a series of experiments using both manganese and samarium as surrogates for americium were conducted. The modeling results showed that volatility losses can be controlled to essentially no losses with a modest overpressure. Experimental results also showed volatile species retention down to no detectable losses through overpressure, and although the loss values varied from the model results the same trend was seen. Based on these results it is very probable that americium losses through volatility can be controlled to no detectable losses through application of a modest overpressure during casting.

Fielding, Randall S.; Porter, Douglas L.

2013-10-01

280

The USAMP magnesium powertrain cast components project  

NASA Astrophysics Data System (ADS)

Despite the demonstrated ability of magnesium alloys to significantly reduce weight at acceptable costs in many areas of an automobile, powertrain components have not benefited from this metal, primarily because the high-temperature alloys that are required for engines and transmissions are too expensive. However, the U.S. Department of Energy and the U.S. Automotive Materials Partnership have launched a project to evaluate several new, potentially low-cost magnesium alloys, design several pre-competitive power-train components for the best alloy properties, cast and dynamometer or vehicle test the components in assembled powertrains, develop a powertrain magnesium alloy design database and common alloy specification, and identify andpromote the funding of fundamental research into improved magnesium alloys and casting processes.

Powell, Bob R.

2002-02-01

281

The USAMP magnesium powertrain cast components project  

NASA Astrophysics Data System (ADS)

The U.S. Automotive Materials Partnership (USAMP) and the U.S. Department of Energy launched the Magnesium Powertrain Cast Components Project in 2001 to determine the feasibility of producing a magnesiumintensive engine—a six-cylinder engine with a magnesium block, bedplate, oil pan, and front cover. As the project approaches its midpoint, two goals are near completion: evaluation of the best available low-cost, creep-resistant magnesium alloys and design of engine components using the properties of the best alloys. Phase II of the project sets three additional goals: casting and testing the magnesium components in assembled powertrains, developing a powertrain magnesium alloy design database and common specification for magnesium powertrain alloys, and funding and promoting research to enable even more advanced powertrain applications in North America.

Powell, Bob R.

2003-11-01

282

Solar axion search with the CAST experiment  

E-print Network

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of an LHC dipole. The analysis of the data recorded during the first phase of the experiment with vacuum in the magnet pipes has resulted in the most restrictive experimental limit on the coupling constant of axions to photons. In the second phase, CAST is operating with a buffer gas inside the magnet pipes in order to extent the sensitivity of the experiment to higher axion masses. We will present the first results on the $^{4}{\\rm He}$ data taking as well as the system upgrades that have been operated in the last year in order to adapt the experiment for the $^{3}{\\rm He}$ data taking. Expected sensitivities on the coupling constant of axions to photons will be given for the recent $^{3}{\\rm He}$ run just started in March 2008.

CAST Collaboration; E. Arik; S. Aune; D. Autiero; K. Barth; A. Belov; B. Beltrán; S. Borghi; F. S. Boydag; H. Bräuninger; G. Cantatore; J. M. Carmona; S. A. Cetin; J. I. Collar; T. Dafni; M. Davenport; L. Di Lella; O. B. Dogan; C. Eleftheriadis; N. Elias; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; J. Franz; J. Galán; E. Gazis; T. Geralis; I. Giomataris; S. Gninenko; H. Gómez; M. Hasinoff; F. H. Heinsius; I. Hikmet; D. H. H. Hoffmann; I. G. Irastorza; J. Jacoby; K. Jakov?i?; D. Kang; T. Karageorgopoulou; M. Karuza; K. Königsmann; R. Kotthaus; M. Kr?mar; K. Kousouris; M. Kuster; B. Laki?; C. Lasseur; A. Liolios; A. Ljubi?i?; V. Lozza; G. Lutz; G. Luzón; D. Miller; J. Morales; T. Niinikoski; A. Nordt; A. Ortiz; T. Papaevangelou; M. J. Pivovaroff; A. Placci; G. Raiteri; G. Raffelt; H. Riege; A. Rodríguez; J. Ruz; I. Savvidis; Y. Semertzidis; P. Serpico; S. K. Solanki; R. Soufli; L. Stewart; M. Tsagri; K. van Bibber; J5D. Villar; J. Vogel; L. Walckiers; K. Zioutas

2008-10-10

283

Process for slip casting textured tubular structures  

DOEpatents

A process for centrifugal slip casting a textured hollow tube. A slip made up of a carrier fluid and a suspended powder is introduced into a porous mold which is rotated at a speed sufficient to create a centrifugal force that forces the slip radially outward toward the inner surface of the mold. The suspended powder, which is formed of particles having large dimensional aspect ratios such as particles of superconductive BSCCO, settles in a textured fashion radially outward toward the mold surface. The carrier fluid of the slip passes by capillary action radially outward around the settled particles and into the absorbent mold. A layer of mold release material is preferably centrifugally slip cast to cover the mold inner surface prior to the introduction of the BSCCO slip, and the mold release layer facilitates removal of the BSCCO greenbody from the mold without fracturing.

Steinlage, Greg A. (West Lafayette, IN); Trumble, Kevin P. (West Lafayette, IN); Bowman, Keith J. (West Lafayette, IN)

2002-01-01

284

Microstructure of WE43 casting magnesium alloy  

Microsoft Academic Search

Purpose: WE43 is a high-strength magnesium alloy characterized by good mechanical properties both at an ambient and elevated temperature (up to 300°C). It contains mainly yttrium and neodymium. The aim of this paper is to present the results of research on the microstructure of the WE43 magnesium alloy in an as-cast condition. Design\\/methodology\\/approach: For the microstructure observation, a Reichert metallographic

T. Rzycho?; A. Kie?bus

285

Repair welding of gamma titanium aluminide castings  

NASA Astrophysics Data System (ADS)

This paper examines the GTA repair welding of cast Ti-48Al-2Cr-2Nb gamma titanium aluminide. Pre-weld heat treatment, preheat and welding parameters are evaluated and discussed. A wide range of GTAW parameters is demonstrated for use with this alloy and the resulting weld structure is examined. The effects of postweld heat treatment on the structure of the weld deposit is also determined.

Kelly, T. J.

286

Alumina casting based on gelation of gelatine  

Microsoft Academic Search

A new colloidal in-situ forming technique based on the gelling property of gelatine is discussed in this paper. A warm slurry containing more than 50vol% alumina powder and a small amount of gelatine (?1wt% of powder weight) is cast into a nonporous mould, and a rigid green body can be produced upon cooling below the so-called gel point of gelatine

Yali Chen; Zhipeng Xie; Jinlong Yang; Yong Huang

1999-01-01

287

Efficient Runner Networks for Investment Castings  

SciTech Connect

We present a computational method that finds an efficient runner network for an investment casting, once the gate locations have been established. The method seeks to minimize a cost function that is based on total network volume. The runner segments are restricted to lie in the space not occupied by the part itself. The collection of algorithms has been coded in C and runner designs have been computed for several real parts, demonstrating substantial reductions in rigging volume.

GIVLER,RICHARD C.; SAYLORS,DAVID B.

2000-07-18

288

Thin Wall Cast Iron: Phase II  

SciTech Connect

The development of thin-wall technology allows the designers of energy consuming equipment to select the most appropriate material based on cost/material properties considerations, and not solely on density. The technology developed in this research project will permit the designers working for the automotive industry to make a better informed choice between competing materials and thin wall cast iron, thus decreasing the overall cost of the automobile.

Doru M. Stefanescu

2005-07-21

289

Review: aqueous tape casting of ceramic powders  

Microsoft Academic Search

Slurry formulations and processing parameters of the water-based tape casting of ceramic powders are reviewed. Additives include binders, like cellulose ethers, vinyl or acrylic-type polymers; plasticizers, like glycols; and dispersants, like ammonium salts of poly(acrylic acids). Mostly alumina powders have been employed. Hydrophobing of ceramic powders permits the aqueous processing even of water-reactive powders, like aluminium nitride. Non-toxicity and non-inflammability

D. Hotza; P. Greil

1995-01-01

290

Internal adaptation of cast titanium crowns.  

PubMed

As the adaptation of titanium crowns obtained by Rematitan Plus investment, specific for titanium, is not recognized to be suitable, this study evaluated the effect of the concentration of the specific liquid and the temperature of the mold of investments on the internal misfit of crowns cast on commercially pure titanium. Individual dies of epoxy resin were obtained, representing teeth prepared for full-crown restoration with a 6-degree axial surface convergence angle and shoulder (1.0 mm). For the waxing of each crown, a ring-shaped stainless steel matrix (8.0mm internal diameter; 7.5 mm height) was adapted above the individual dies of epoxy resin. The Rematian Plus investment was mixed according to the manufacturer's instructions using two different concentrations of the specific liquid: 100%, 75%. Casting was performed in a Discovery Plasma Ar-arc vacuum-pressure casting machine with molds at temperatures of 430 degrees C, 515 degrees C and 600 degrees C. The crowns were cleaned individually in a solution (1% HF + 13% HNO3) for 10 min using a ultrasonic cleaner, with no internal adaptations, and luted with zinc phosphate cement under a 5 kg static load. The crown and die assemblies were embedded in resin and sectioned longitudinally. The area occupied by cement was observed using stereoscopic lens (10X) and measured by the Leica Qwin image analysis system (mm(2)). The data for each experimental condition (n=8) were analyzed by Kruskal-Wallis non-parametric test (á=0.05). The results showed that liquid dilution and the increase in mold temperature did not significantly influence the levels of internal fit of the cast titanium crowns. The lowest means (+/-SD) of internal misfit were obtained for the 430 degrees C/100%: (7.25 mm(2) +/-1.59) and 600 degrees C/100% (8.8 mm(2) +/-2.25) groups, which presented statistically similar levels of internal misfit. PMID:19089139

da Rocha, Sicknan Soares; Adabo, Gelson Luis; Ribeiro, Ricardo Faria; Fonseca, Renata Garcia

2007-08-01

291

Thin sheet casting with electromagnetic pressurization  

SciTech Connect

An apparatus, method and system for the casting of thin strips or strips of metal upon a moving chill block that includes an electromagnet located so that molten metal poured from a reservoir onto the chill block passes into the magnetic field produced by the electromagnet. The electromagnet produces a force on the molten metal on said chill block in the direction toward said chill block in order to enhance thermal contact between the molten metal and the chill block.

Walk, Steven R. (Winterport, ME); Slepian, R. Michael (Pittsburgh, PA); Nathenson, Richard D. (Pittsburgh, PA); Williams, Robert S. (Fairfield, OH)

1991-01-01

292

CAST: An Inspiring Axion Helioscope ala Sikivie  

SciTech Connect

CAST is a data taking axion helioscope using a recycled LHC test magnet, CERN's detector technology and cryogenics expertise. An imaging X-ray telescope improves substantially the detection sensitivity and axion-ID. Massive axion-like particles of the Kaluza-Klein type were first introduced to explain the paradox of the hot corona, which is even hotter at locations overlying magnetic spots. This is suggesting that the CAST detection principle might be at work there, but being somehow modified and performing better. Remarkably, the density profile of the Sun allows for resonance crossing (m{sub axion}c{sup 2{approx_equal}}h{omega}{sub plasma}), which axion helioscopes are aiming to reach. The restless Sun favours this occasionally even further. Then, such processes can give rise to a chimera of converted axions or the like, making the Sun appear, within known physics, as mysterious and unpredictable as it is. CAST axion limits were used to conclude also for the hidden sector paraphotons. This is then suggestive for novel helioscopes for exotica like paraphotons, chameleons, etc. Pierre Sikivie's pioneering idea was to use a magnetic field as a catalyst to transform particles from the dark sector to ours, and vice versa.

Zioutas, K.; Anastassopoulos, V. [University of Patras, Patras (Greece); Tsagri, M. [University of Patras, Patras (Greece); CERN, 1211 Geneve 23 (Switzerland); Semertzidis, Y. [Brookhaven National Laboratory, Upton, NY (United States); Papaevangelou, T. [IRFU, Centre d'Etudes Nucleaires de Saclay, Gif-sur-Yvette (France)

2010-08-30

293

Seal welded cast iron nuclear waste container  

DOEpatents

This invention identifies methods and articles designed to circumvent metallurgical problems associated with hermetically closing an all cast iron nuclear waste package by welding. It involves welding nickel-carbon alloy inserts which are bonded to the mating plug and main body components of the package. The welding inserts might be bonded in place during casting of the package components. When the waste package closure weld is made, the most severe thermal effects of the process are restricted to the nickel-carbon insert material which is far better able to accommodate them than is cast iron. Use of nickel-carbon weld inserts should eliminate any need for pre-weld and post-weld heat treatments which are a problem to apply to nuclear waste packages. Although the waste package closure weld approach described results in a dissimilar metal combination, the relative surface area of nickel-to-iron, their electrochemical relationship, and the presence of graphite in both materials will act to prevent any galvanic corrosion problem.

Filippi, Arthur M. (Pittsburgh, PA); Sprecace, Richard P. (Murrysville, PA)

1987-01-01

294

Hickey, W8009C, casts 10-14,14A Hickey, W8009C, casts 10-14,14A, page 1  

E-print Network

Hickey, W8009C, casts 10-14,14A Hickey, W8009C, casts 10-14,14A, page 1 #12;Hickey, W8009C, casts 10-14,14A Hickey, W8009C, casts 10-14,14A, page 2 #12;Hickey, W8009C, casts 10-14,14A Hickey, W8009C, casts 10-14,14A, page 3 #12;Hickey, W8009C, casts 10-14,14A Hickey, W8009C, casts 10-14,14A, page 4 #12

Hickey, Barbara

295

Cast Stone Formulation At Higher Sodium Concentrations  

SciTech Connect

A low temperature waste form known as Cast Stone is being considered to provide supplemental Low Activity Waste (LAW) immobilization capacity for the Hanford site. Formulation of Cast Stone at high sodium concentrations is of interest since a significant reduction in the necessary volume of Cast Stone and subsequent disposal costs could be achieved if an acceptable waste form can be produced with a high sodium molarity salt solution combined with a high water to premix (or dry blend) ratio. The objectives of this study were to evaluate the factors involved with increasing the sodium concentration in Cast Stone, including production and performance properties and the retention and release of specific components of interest. Three factors were identified for the experimental matrix: the concentration of sodium in the simulated salt solution, the water to premix ratio, and the blast furnace slag portion of the premix. The salt solution simulants used in this study were formulated to represent the overall average waste composition. The cement, blast furnace slag, and fly ash were sourced from a supplier in the Hanford area in order to be representative. The test mixes were prepared in the laboratory and fresh properties were measured. Fresh density increased with increasing sodium molarity and with decreasing water to premix ratio, as expected given the individual densities of these components. Rheology measurements showed that all of the test mixes produced very fluid slurries. The fresh density and rheology data are of potential value in designing a future Cast Stone production facility. Standing water and density gradient testing showed that settling is not of particular concern for the high sodium compositions studied. Heat of hydration measurements may provide some insight into the reactions that occur within the test mixes, which may in turn be related to the properties and performance of the waste form. These measurements showed that increased sodium concentration in the salt solution reduced the time to peak heat flow, and reducing the amount of slag in the premix increased the time to peak heat flow. These observations may help to describe some of the cured properties of the samples, in particular the differences in compressive strength observed after 28 and 90 days of curing. Samples were cured for at least 28 days at ambient temperature in the laboratory prior to cured properties analyses. The low activity waste form for disposal at the Hanford Site is required to have a compressive strength of at least 500 psi. After 28 days of curing, several of the test mixes had mean compressive strengths that were below the 500 psi requirement. Higher sodium concentrations and higher water to premix ratios led to reduced compressive strength. Higher fly ash concentrations decreased the compressive strength after 28 days of curing. This may be explained in that the cementitious phases matured more quickly in the mixes with higher concentrations of slag, as evidenced by the data for the time to peak heat generation. All of the test mixes exhibited higher mean compressive strengths after 90 days of curing, with only one composition having a mean compressive strength of less than 500 psi. Leachability indices were determined for the test mixes for contaminants of interest. The leaching performance of the mixes evaluated in this study was not particularly sensitive to the factors used in the experimental design. This may be beneficial in demonstrating that the performance of the waste form is robust with respect to changes in the mix composition. The results of this study demonstrate the potential to achieve significantly higher waste loadings in Cast Stone and other low temperature, cementitious waste forms. Additional work is needed to elucidate the hydration mechanisms occurring in Cast Stone formulated with highly concentrated salt solutions since these reactions are responsible for determining the performance of the cured waste form. The thermal analyses completed in this study provide some preliminary insight, although the l

Fox, K. M.; Roberts, K. A.; Edwards, T. B.

2014-02-28

296

Method and mold for casting thin metal objects  

DOEpatents

Provided herein are various embodiments of systems for casting thin metal plates and sheets. Typical embodiments include layers of mold cavities that are oriented vertically for casting the metal plates. In some embodiments, the mold cavities include a beveled edge such that the plates that are cast have a beveled edge. In some embodiments, the mold cavities are filled with a molten metal through an open horizontal edge of the cavity. In some embodiments, the mold cavities are filled through one or more vertical feed orifices. Further disclosed are methods for forming a thin cast metal plate or sheet where the thickness of the cast part is in a range from 0.005 inches to 0.2 inches, and the surface area of the cast part is in a range from 16 square inches to 144 square inches.

Pehrson, Brandon P; Moore, Alan F

2014-04-29

297

Investment cast AISI H13 tooling for automotive applications  

SciTech Connect

While many techniques exist for production of soft tooling, for die casting there is limited recent experience with cast tooling. The most common US alloy used for manufacture of die casting tooling is wrought AISI H13. If the performance of the cast material is comparable to the wrought counterpart, the use of investment cast HI 3 tooling directly from patterns made via rapid prototyping is of considerable interest. A metallurgical study of investment cast H13 was conducted to evaluate the mechanical behavior in simulated die casting applications. Variable thickness plate investment castings of AISI H13 hot work die steel were produced and characterized in the as-cast and heat-treated conditions. The characterization included light microscopy and mechanical testing. Wrought samples of standard and premium grade H13 were heat-treated and characterized similarly for comparison. Microstructural differences were observed in as-cast samples produced in different section thicknesses. Dendrite cell size and carbide morphology constituted the most prominent microstructural differences observed. After a full heat-treatment, microstructural differences between the wrought material and cast materials were slight regardless of section thickness.The mechanical properties of the cast and heat-treated material proved similar to the properties of the standard heat-treated wrought material. A thermal fatigue testing unit was to con-elate the heat checking susceptibility of H13 steel to its processing and consequent microstructural condition. Surface hardness decreased significantly with thermal cycling, and heat checking was observed in as few as 50 cycles. Thermal softening and thermal fatigue susceptibility were quantified and discussed relative to the microstructural conditions created by processing and heat-treatment. It was found that the premium grade wrought H13 steel provided the best overall resistance to heat checking.

Maguire, M.C.; Baldwin, M.D. [Sandia National Labs., Albuquerque, NM (United States); Hochanadel, P.W.; Edwards, G.R. [Colorado School of Mines, Golden, OH (United States)

1995-07-01

298

Cast prosthesis removal using ultrasonics and a thermoplastic resin adhesive.  

PubMed

Nonsurgical endodontic procedures are routinely performed on teeth with existing cast restorations. The internal anatomy of the tooth and location of the root canals may be obscured by a crown or fixed partial denture. Tooth morphology and canal location may, therefore, be better visualized without the cast restoration in place. This article describes a conservative technique to remove an existing cast restoration to facilitate nonsurgical root canal treatment. PMID:7996088

Parreira, F R; O'Connor, R P; Hutter, J W

1994-03-01

299

Erosive wear characteristics of spheroidal carbides cast iron  

Microsoft Academic Search

In the present investigation, the authors reported erosive wear property of spheroidal carbides cast irons (SCI). SCI was obtained at the temperature of 1700–1800°C by adding about 10% vanadium to crystallize vanadium spheroidal carbides in the structure. Erosive wear tests were performed on high manganese cast iron with spheroidal carbides (SCI–VMn), high V–Cr–Ni cast iron with spheroidal carbides (SCI–VCrNi) and

Xinba Yaer; Kazumichi Shimizu; Hideto Matsumoto; Tadashi Kitsudo; Tadashi Momono

2008-01-01

300

A partitioned resolution for concurrent fluid flow and stress analysis during solidification: application to ingot casting  

E-print Network

casting, or in the mould during continuous casting. The proposed approach consists of a partitioned two in continuous casting) and solid mechanics (stress-strain in solidified regions). This is of crucial importance of ingot casting, or during continuous casting. The current state-of-the-art consists in separating

Paris-Sud XI, Université de

301

Advanced precision expendable pattern casting technology. 1994 Summary report  

SciTech Connect

Casting technology is described. The following areas are reported on: precision pattern production; pattern coating; sand fill and compaction; pattern gating; mechanical properties; and technology transfer efforts.

NONE

1995-05-01

302

Numerical study of porosity in titanium dental castings.  

PubMed

A commercial software package, MAGMASOFT (MAGMA Giessereitechnologie GmbH, Aachen, Germany), was used to study shrinkage and gas porosity in titanium dental castings. A geometrical model for two simplified tooth crowns connected by a connector bar was created. Both mold filling and solidification of this casting model were numerically simulated. Shrinkage porosity was quantitatively predicted by means of a built-in feeding criterion. The risk of gas pore formation was investigated using the numerical filling and solidification results. The results of the numerical simulations were compared with experiments, which were carried out on a centrifugal casting machine with an investment block mold. The block mold was made of SiO2 based slurry with a 1 mm thick Zr2 face coat to reduce metal-mold reactions. Both melting and casting were carried out under protective argon (40 kPa). The finished castings were sectioned and the shrinkage porosity determined. The experimentally determined shrinkage porosity coincided with the predicted numerical simulation results. No apparent gas porosity was found in these model castings. Several running and gating systems for the above model casting were numerically simulated. An optimized running and gating system design was then experimentally cast, which resulted in porosity-free castings. PMID:15348102

Wu, M; Sahm, P R; Augthun, M; Spiekermann, H; Schädlich-Stubenrauch, J

1999-09-01

303

Tribological Properties of Al-SiC Metal Matrix Composites: A Comparison Between Sand Cast and Squeeze Cast Techniques  

NASA Astrophysics Data System (ADS)

Tribological behaviour of Al-SiC metal matrix composites prepared using two different fabrication techniques, viz. sand cast and squeeze cast techniques are studied in a multi- tribotester (TR-25, DUCOM, India) under dry sliding conditions and ambient atmosphere for varying volume fraction of reinforcement, applied load and sliding speed. Friction increases with increase in applied load and sliding speed and volume fraction of reinforcement. Wear test results show increased wear rates at higher load and speed, while increase in SiC volume fraction yields decrease in wear rate. Corrosion study conducted in 3.5 % NaCl solution shows that squeeze cast composites have better corrosion resistance than sand cast composites. Vickers's microhardness test shows improved hardness properties for squeeze cast composites compared to sand cast ones. The microstructure study of wear tracks reveals domination of abrasive wear with minor traces of adhesive wear.

Ghosh, S.; Sahoo, P.; Sutradhar, G.

2014-10-01

304

Initial solidification phenomena in continuous casting  

NASA Astrophysics Data System (ADS)

Continuous casting is the main process route for the mass production of steel today, yielding in excess of 560 million tons annually, corresponding to 80% of total steel production worldwide. As with any process, as improvements are introduced and quality is enhanced, there is the ever greater push to reduce problems that were once minor. The restrictions on quality for certain products require that defects be kept to a minimum. Currently, the industry has developed a wealth of experience in how to deal with slabs with oscillation marks. However, these practices are circumventions of the symptoms of the problems, not solutions for the causes. By understanding the formation mechanism, one can then develop practices based on a logical consideration oft he causes. The goals of this current work were to develop a mold simulator that could replicate the surface quality of industrial slabs. The techniques developed allowed for a more detailed examination of the heat transfer interactions during continuous casting, such that the variations of heat flux due to irregular solidification could be observed. It is shown that the mechanisms proposed in the literature are not individually sufficient for the formation of an oscillation mark, but several are necessary and must occur in concert for one to form. A mechanism is proposed for the formation of oscillation marks based upon the experimental results. This hypothesis is formulated as a series of necessary conditions that must be satisfied for an oscillation mark to be formed. This hypothesis is described, and shown to be in agreement with the trends observed and reported in the literature. It can explain both the overflow- and depression-type mark seen in industrial slabs. Additionally, this hypothesis was successfully used as a method of predicting the locations of oscillation marks on cast shells based upon the mold heat transfer measurements.

Badri, Adam

305

Phase Transformations in Cast Duplex Stainless Steels  

SciTech Connect

Duplex stainless steels (DSS) constitute both ferrite and austenite as a matrix. Such a microstructure confers a high corrosion resistance with favorable mechanical properties. However, intermetallic phases such as {sigma} and {chi} can also form during casting or high-temperature processing and can degrade the properties of the DSS. This research was initiated to develop time-temperature-transformation (TTT) and continuous-cooling-transformation (CCT) diagrams of two types of cast duplex stainless steels, CD3MN (Fe-22Cr-5Ni-Mo-N) and CD3MWCuN (Fe-25Cr-7Ni-Mo-W-Cu-N), in order to understand the time and temperature ranges for intermetallic phase formation. The alloys were heat treated isothermally or under controlled cooling conditions and then characterized using conventional metallographic methods that included tint etching, and also using electron microscopy (SEM, TEM) and wavelength dispersive spectroscopy (WDS). The kinetics of intermetallic-phase ({sigma} + {chi}) formation were analyzed using the Johnson-Mehl-Avrami (MA) equation in the case of isothermal transformations and a modified form of this equation in the case of continuous cooling transformations. The rate of intermetallic-phase formation was found to be much faster in CD3MWCuN than CD3MN due mainly to differences in the major alloying contents such as Cr, Ni and Mo. To examine in more detail the effects of these elements of the phase stabilities; a series of eight steel castings was designed with the Cr, Ni and Mo contents systematically varied with respect to the nominal composition of CD3MN. The effects of varying the contents of alloying additions on the formation of intermetallic phases were also studied computationally using the commercial thermodynamic software package, Thermo-Calc. In general, {sigma} was stabilized with increasing Cr addition and {chi} by increasing Mo addition. However, a delicate balance among Ni and other minor elements such as N and Si also exists. Phase equilibria in DSS can be affected by local composition fluctuations in the cast alloy. This may cause discrepancy between thermodynamic prediction and experimental observation.

Yoon-Jun Kim

2004-12-19

306

Reconciling the CAST and PVLAS Results  

E-print Network

The PVLAS experiment has recently claimed evidence for an axion-like particle in the milli-electron-Volt mass range with a coupling to two photons that appears to be in contradiction with the negative results of the CAST experiment searching for solar axions. The simple axion interpretation of these two experimental results is therefore untenable and it has posed a challenge for theory. We propose a possible way to reconcile these two results by postulating the existence of an ultralight pseudo-scalar particle interacting with two photons and a scalar boson and the existence of a low scale phase transition in the theory.

R. N. Mohapatra; Salah Nasri

2006-10-06

307

Sputtered protective coatings for die casting dies  

NASA Technical Reports Server (NTRS)

This investigation determined whether selected ion beam sputtered coatings on H-13 die steel would have the potential of improving the thermal fatigue behavior of the steel used as a die in aluminum die casting. The coatings were selected to test candidate insulators and metals capable of providing protection of the die surface. The studies indicate that 1 micrometer thick W and Pt coatings reduced the thermal fatigue more than any other coating tested and are candidates to be used on a die surface to increase die life.

Mirtich, M. J.; Nieh, C. Y.; Wallace, J. F.

1981-01-01

308

Method and apparatus for strip casting  

DOEpatents

Casting nozzles will provide improved flow conditions with the parameters controlled according to the present invention. The gap relationships between the nozzle slot and exit orifice must be controlled in combination with converging exit passageway to provide a smooth flow without shearing and turbulence in the stream. The nozzle lips are also rounded to improve flow and increase refractory life of the lips of the nozzle. The tundish walls are tapered to provide improve flow for supplying the melt to the nozzle. The nozzle is located about 45[degree] below top dead center for optimum conditions. 2 figures.

Follstaedt, D.W.; Powell, J.C.; Sussman, R.C.; Williams, R.S.

1991-11-12

309

Method and apparatus for strip casting  

DOEpatents

Casting nozzles will provide improved flow conditions with the parameters controlled according to the present invention. The gap relationships between the nozzle slot and exit orifice must be controlled in combination with converging exit passageway to provide a smooth flow without shearing and turbulence in the stream. The nozzle lips are also rounded to improve flow and increase refractory life of the lips of the nozzle. The tundish walls are tapered to provide improve flow for supplying the melt to the nozzle. The nozzle is located about 45.degree. below top dead center for optimum conditions.

Follstaedt, Donald W. (Middletown, OH); Powell, John C. (Pittsburgh, PA); Sussman, Richard C. (West Chester, OH); Williams, Robert S. (Fairfield, OH)

1991-01-01

310

Forming of cast precious metal alloys.  

PubMed

It has proven possible to express the true stress-true strain behavior of dental casting alloys by means of a general equation with empirically determined constants. It was also found that the appropriate strain hardening equation for the precious alloys used in this investigation was an exponential function. Integration of the equations, using individually determined constants, made it possible to calculate the work necessary to plastically deform the alloys to a final true strain of 0.05 or any other realistic value. Comparisons of the ease of forming the alloys investigated here showed that this technique yields results similar to those encountered in clinical experience. PMID:7024359

Baran, G; Woodland, E C

1981-10-01

311

Electromagnetic continuous casting project: Final report  

SciTech Connect

This report describes the work on development of an electromagnetic casting process for steel, which was carried out at Argonne National Laboratory between January 1985 and December 1987. This effort was concerned principally with analysis and design work on magnet technology, liquid metal feed system, coolant system, and sensors and process controllers. Experimentation primarily involved (1) electromagnetic studies to determine the conditions and controlling parameters for stable levitation and (2) feed-system studies to establish important parameters that control and influence fluid flow from the liquid metal source to the caster. 73 refs., 91 figs., 11 tabs.

Battles, J.E.; Rote, D.M.; Misra, B.; Praeg, W.F.; Hull, J.R.; Turner, L.R.; Shah, V.L.; Lari, R.J.; Gopalsami, N.; Wiencek, T.

1988-10-01

312

Thin section casting program. Volume 3: Vertical TSC (Thin-Section Casting) approach  

NASA Astrophysics Data System (ADS)

A prototype vertical twin belt caster was designed, constructed and tested at Bethlehem Steel Corporation's Homer Research Laboratory for the development of a thin section casting process. In the prototype caster, the moving mold was aligned vertically and each of the two endless steel belts was tensioned around an upper and a lower large pulley by means of a third smaller pulley. The mold consisted of a long parallel lower section and a shorter V-shaped top section into which liquid steel was fed from a tundish via a submerged refractory nozzle. Mold length, defined as the distance from the meniscus in the V-mouth to the tangent point of the lower pulleys, was about eleven feet. The length of the V-mouth was 27 in. The belts were continuously supported between the upper and lower pulleys by a unique back-up system. Downstream support consisted of two pairs of foot rolls and a vertical water-cooled steel structure that would permit a cast length of about nineteen feet. A chain driven bar was used to start a cast and support the slab. The aim was to cast 1 in. by 17 in. sections at 250 in./min. The details of the prototype vertical caster, except the end walls, are given.

1989-01-01

313

Casting of Ti-6Al-4V alloy compared with pure Ti in an Ar-arc casting machine.  

PubMed

Dental prostheses of Ti are normally cast in pure Ti. Some appliances, however, require higher yield strength. Casting of Ti alloys is of interest in such cases. The objective of the present work was to study the quality of castings made of Ti-6Al-4V compared with those made of pure Ti. Casting was made into a mold kept at room temperature using a MgO-Al2O3 investment. A standardized five-unit bridge was cast, consisting of two cylindrical crowns with sharp margins and three pontics. The overall mold filling was satisfactory. The margins of the casting alloys were, however, more rugged and incomplete than those of pure Ti. The most likely reason for this difference is the increased formation of dendrites in the alloy and thus more resistance to fluid flow. Furthermore, the sprue of the alloy was also found to contain some spherical, internal pores. Such pores were rare in the pure Ti castings. The surface reactions were found to be minimal for both of the materials. Increased casting deficiencies observed in the cast bridges of the Ti-6Al-4V alloy, compared with pure Ti, were: 1) the margins of the crowns in the bridge were less complete and 2) there was a tendency to an increased internal porosity, particularly in the sprues. PMID:8521125

Syverud, M; Okabe, T; Herø, H

1995-10-01

314

Spall behavior of cast iron with varying microstructures  

NASA Astrophysics Data System (ADS)

The spall strength of cast iron with varying microstructures has been investigated using plate impact at moderate speed. Stress history measurements were made with manganin stress gauges embedded between the back face of the specimen and a low impedance polycarbonate backing. Five separate cast irons were tested. Four of these consisted of gray cast iron with graphite in flake form, with three classified as Type VII A2 and the fourth containing a bimodal distribution of Types VII A4 and VII D8. The fifth casting consisted of ductile cast iron with graphite in nodular form, classified as Type I, size class 5. The spall strength for the Type VII A2 gray cast irons varied between 40 and 370 MPa, and that of the additional gray cast iron, between 410 and 490 MPa. The spall strength of the ductile cast iron fell within the range of 0.94-1.2 GPa. It is shown that the spall strength is linked to the damage level at the spall plane, where an increased level of tensile stress is required to generate higher levels of damage. Post mortem analysis was performed on the recovered samples, revealing the graphite phase to be the primary factor governing the spall fracture of cast irons, where crack nucleation is directly correlated to the debonding of graphite from the metal matrix. The average length of graphite found within a casting is linked to the material's strength, where strength increases as a function of decreasing length. The morphology and mean free path of graphite precipitates further govern the subsequent coalescence of initiated cracks to form a complete fracture plane. In cases where graphite spacing is large, increased energy level is required to complete the fracture process. A secondary factor governing the spall fracture of cast irons has also been linked to the microstructure of the metal matrix, with pearlite yielding higher spall strengths than free ferrite.

Plume, Gifford; Rousseau, Carl-Ernst

2014-07-01

315

Shallow water model for horizontal centrifugal casting  

NASA Astrophysics Data System (ADS)

A numerical model was proposed to simulate the solidification process of an outer shell of work roll made by the horizontal centrifugal casting technique. Shallow water model was adopted to solve the 2D average flow dynamics of melt spreading and the average temperature distribution inside the centrifugal casting mould by considering the centrifugal force, Coriolis force, viscous force due to zero velocity on the mould wall, gravity, and energy transport by the flow. Additionally, a 1D sub-model was implemented to consider the heat transfer in the radial direction from the solidifying shell to the mould. The solidification front was tracked by fulfilling the Stefan condition. Radiative and convective heat losses were included from both, the free liquid surface and the outer wall of the mould. Several cases were simulated with the following assumed initial conditions: constant height of the liquid metal (10, 20, and 30 mm), uniform temperature of the free liquid surface (1755 K). The simulation results have shown that while the solidification front remained rather flat, the free surface was disturbed by waves. The amplitude of waves increased with the liquid height. Free surface waves diminished as the solidification proceeded.

Bohá?ek, J.; Kharicha, A.; Ludwig, A.; Wu, M.

2012-07-01

316

Advanced Lost Foam Casting Technology - Phase V  

SciTech Connect

Previous research, conducted under DOE Contracts DE-FC07-89ID12869, DE-FC07-93ID12230 and DE-FC07-95ID113358 made significant advances in understanding the Lost Foam Casting (LFC) Process and clearly identified areas where additional developments were needed to improve the process and make it more functional in industrial environments. The current project focused on eight tasks listed as follows: Task 1--Computational Model for the Process and Data Base to Support the Model; Task 2--Casting Dimensional Accuracy; Task 3--Pattern Production; Task 4--Improved Pattern Materials; Task 5--Coating Control; Task 6--In-Plant Case Studies; Task 7--Energy and the Environmental Data; and Task 8--Technology Transfer. This report summarizes the work done on all tasks in the period of October 1, 1999 through September 30, 2004. The results obtained in each task and subtask are summarized in this Executive Summary and details are provided in subsequent sections of the report.

Wanliang Sun; Harry E. Littleton; Charles E. Bates

2004-04-29

317

Horizontal electromagnetic casting of thin metal sheets  

DOEpatents

Thin metal sheets are cast by magnetically suspending molten metal deposited within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled to form a solid metal sheet. Magnetic flux increases as the molten metal sheet moves downward and decreases as the molten metal sheet moves upward to stabilize the sheet and maintain it in equilibrium as it is linearly displaced and solidified by cooling gases. A conducting shield is electrically coupled to the molten metal sheet by means of either metal sheet engaging rollers or brushes on the solidified metal, and by means of an electrode in the vessel containing the molten metal thereby providing a return path for the eddy currents induced in the metal sheet by the AC coil generated magnetic flux. Variation in the geometry of the conducting shield allows the magnetic flux between the metal sheet and the conducting shield to be varied and the thickness in surface quality of the metal sheet to be controlled. Side guards provide lateral containment for the molten metal sheet and stabilize and shape the magnetic field while a leader sheet having electromagnetic characteristics similar to those of the metal sheet is used to start the casting process and precedes the molten metal sheet through the magnet and forms a continuous sheet therewith. The magnet may be either U-shaped with a single racetrack coil or may be rectangular with a pair of facing bedstead coils.

Hull, John R. (Hinsdale, IL); Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL)

1988-01-01

318

Horizontal electromagnetic casting of thin metal sheets  

DOEpatents

Thin metal sheets are cast by magnetically suspending molten metal deposited within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled to form a solid metal sheet. Magnetic flux increases as the molten metal sheet moves downward and decreases as the molten metal sheet moves upward to stabilize the sheet and maintain it in equilibrium as it is linearly displaced and solidified by cooling gases. A conducting shield is electrically coupled to the molten metal sheet by means of either metal sheet engaging rollers or brushes on the solidified metal, and by means of an electrode in the vessel containing the molten metal thereby providing a return path for the eddy currents induced in the metal sheet by the AC coil generated magnetic flux. Variation in the geometry of the conducting shield allows the magnetic flux between the metal sheet and the conducting shield to be varied and the thickness in surface quality of the metal sheet to be controlled. Side guards provide lateral containment for the molten metal sheet and stabilize and shape the magnetic field while a leader sheet having electromagnetic characteristics similar to those of the metal sheet is used to start the casting process and precedes the molten metal sheet through the magnet and forms a continuous sheet therewith. The magnet may be either U-shaped with a single racetrack coil or may be rectangular with a pair of facing bedstead coils.

Hull, John R. (Hinsdale, IL); Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL)

1987-01-01

319

40 CFR 420.60 - Applicability; description of the continuous casting subcategory.  

Code of Federal Regulations, 2011 CFR

...POINT SOURCE CATEGORY Continuous Casting Subcategory § 420.60 Applicability; description of the continuous casting subcategory. The provisions...treatment works resulting from the continous casting of molten steel into...

2011-07-01

320

40 CFR 420.60 - Applicability; description of the continuous casting subcategory.  

Code of Federal Regulations, 2010 CFR

...POINT SOURCE CATEGORY Continuous Casting Subcategory § 420.60 Applicability; description of the continuous casting subcategory. The provisions...treatment works resulting from the continous casting of molten steel into...

2010-07-01

321

75 FR 67395 - Iron Construction Castings From Brazil, Canada, and China; Determinations  

Federal Register 2010, 2011, 2012, 2013

...731-TA-262, 263, and 265 (Third Review)] Iron Construction Castings From Brazil, Canada...the countervailing duty order on heavy iron construction castings from Brazil, the antidumping duty order on heavy iron construction castings from Canada,...

2010-11-02

322

40 CFR 466.20 - Applicability; description of the cast iron basis material subcategory.  

...Applicability; description of the cast iron basis material subcategory. 466.20...PORCELAIN ENAMELING POINT SOURCE CATEGORY Cast Iron Basis Material Subcategory § 466.20 Applicability; description of the cast iron basis material subcategory....

2014-07-01

323

40 CFR 721.10667 - Slimes and sludges, aluminum and iron casting, wastewater treatment, solid waste.  

Code of Federal Regulations, 2013 CFR

...false Slimes and sludges, aluminum and iron casting, wastewater treatment, solid...10667 Slimes and sludges, aluminum and iron casting, wastewater treatment, solid...generically as slimes and sludges, aluminum and iron casting, wastewater treatment,...

2013-07-01

324

40 CFR 466.20 - Applicability; description of the cast iron basis material subcategory.  

Code of Federal Regulations, 2013 CFR

...Applicability; description of the cast iron basis material subcategory. 466.20...PORCELAIN ENAMELING POINT SOURCE CATEGORY Cast Iron Basis Material Subcategory § 466.20 Applicability; description of the cast iron basis material subcategory....

2013-07-01

325

40 CFR 466.20 - Applicability; description of the cast iron basis material subcategory.  

Code of Federal Regulations, 2010 CFR

...Applicability; description of the cast iron basis material subcategory. 466.20...PORCELAIN ENAMELING POINT SOURCE CATEGORY Cast Iron Basis Material Subcategory § 466.20 Applicability; description of the cast iron basis material subcategory....

2010-07-01

326

40 CFR 466.20 - Applicability; description of the cast iron basis material subcategory.  

Code of Federal Regulations, 2011 CFR

...Applicability; description of the cast iron basis material subcategory. 466.20...PORCELAIN ENAMELING POINT SOURCE CATEGORY Cast Iron Basis Material Subcategory § 466.20 Applicability; description of the cast iron basis material subcategory....

2011-07-01

327

40 CFR 721.10667 - Slimes and sludges, aluminum and iron casting, wastewater treatment, solid waste.  

...false Slimes and sludges, aluminum and iron casting, wastewater treatment, solid...10667 Slimes and sludges, aluminum and iron casting, wastewater treatment, solid...generically as slimes and sludges, aluminum and iron casting, wastewater treatment,...

2014-07-01

328

75 FR 54596 - Final Results of Expedited Sunset Review: Heavy Iron Construction Castings from Brazil  

Federal Register 2010, 2011, 2012, 2013

...Results of Expedited Sunset Review: Heavy Iron Construction Castings from Brazil AGENCY...countervailing duty order (``CVD'') on heavy iron construction castings from Brazil pursuant...third sunset review of the CVD order on iron construction castings from Brazil...

2010-09-08

329

75 FR 23295 - Iron Construction Castings From Brazil, Canada, and China  

Federal Register 2010, 2011, 2012, 2013

...731-TA-262, 263, and 265 (Third Review)] Iron Construction Castings From Brazil, Canada...countervailing duty order on ``heavy'' iron construction castings from Brazil, the antidumping duty order on ``heavy'' iron construction castings from Canada,...

2010-05-03

330

40 CFR 466.20 - Applicability; description of the cast iron basis material subcategory.  

Code of Federal Regulations, 2012 CFR

...Applicability; description of the cast iron basis material subcategory. 466.20...PORCELAIN ENAMELING POINT SOURCE CATEGORY Cast Iron Basis Material Subcategory § 466.20 Applicability; description of the cast iron basis material subcategory....

2012-07-01

331

Genetic caste determination in Pogonomyrmex harvester ants imposes costs during colony founding  

E-print Network

Genetic caste determination in Pogonomyrmex harvester ants imposes costs during colony founding T with marked morphological differences between the queen and worker castes. These differences usually result). However, genetically determined caste differentiation has been recently discovered in two populations

Alvarez, Nadir

332

76 FR 27668 - Algonac Cast Products, Inc., Algonac, MI; Notice of Revised Determination on Reconsideration  

Federal Register 2010, 2011, 2012, 2013

...Administration [TA-W-74,549] Algonac Cast Products, Inc., Algonac, MI; Notice...the workers and former workers of Algonac Cast Products, Inc., Algonac, Michigan...sales/production declines at Algonac Cast Products, Inc., Algonac,...

2011-05-12

333

21 CFR 888.5980 - Manual cast application and removal instrument.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Manual cast application and removal instrument...Surgical Devices § 888.5980 Manual cast application and removal instrument. (a) Identification. A manual cast application and removal...

2013-04-01

334

21 CFR 888.5980 - Manual cast application and removal instrument.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Manual cast application and removal instrument...Surgical Devices § 888.5980 Manual cast application and removal instrument. (a) Identification. A manual cast application and removal...

2011-04-01

335

49 CFR 192.369 - Service lines: Connections to cast iron or ductile iron mains.  

...false Service lines: Connections to cast iron or ductile iron mains. 192.369...369 Service lines: Connections to cast iron or ductile iron mains. (a) Each service line connected to a cast iron or ductile iron main must be...

2014-10-01

336

Hickey-W8305A_casts31-39 Hickey-W8305A_casts31-39,page1  

E-print Network

Hickey-W8305A_casts31-39 Hickey-W8305A_casts31-39,page1 #12;Hickey-W8305A_casts31-39 Hickey-W8305A_casts31-39,page2 #12;Hickey-W8305A_casts31-39 Hickey-W8305A_casts31-39,page3 #12;Hickey-W8305A_casts31-39 Hickey-W8305A_casts31-39,page4 #12;Hickey-W8305A_casts31-39 Hickey-W8305A_casts31-39,page5 #12;Hickey

Hickey, Barbara

337

Analysis of the Potential Productivity of Continuous Cast Molds  

Microsoft Academic Search

Heat transfer in the mold is the heart of the continuous casting process and its quantitative analysis was pioneered by Keith Brimacombe. With many different processes currently competing, it is appropriate to apply modeling to investigate the theoretical limits of continuous casting speed and productivity. The heat transfer rate during solidification processes drops with time so the shell thickness at

C. Li; B. G. Thomas

338

Biological interactions of dental cast alloys with oral tissues  

Microsoft Academic Search

Objective: All dental cast alloys release metal ions into the oral environment which have the potential to interact with the oral tissues. Amount and type of metal elements released are varying and not directly related to the composition of the alloy. The aim of the present literature survey was to describe the interactions of dental cast alloys with living tissues

Gottfried Schmalz; Pauline Garhammer

2002-01-01

339

Independent origins of Indian caste and tribal paternal lineages.  

PubMed

The origins of the nearly one billion people inhabiting the Indian subcontinent and following the customs of the Hindu caste system are controversial: are they largely derived from Indian local populations (i.e. tribal groups) or from recent immigrants to India? Archaeological and linguistic evidence support the latter hypothesis, whereas recent genetic data seem to favor the former hypothesis. Here, we analyze the most extensive dataset of Indian caste and tribal Y chromosomes to date. We find that caste and tribal groups differ significantly in their haplogroup frequency distributions; caste groups are homogeneous for Y chromosome variation and more closely related to each other and to central Asian groups than to Indian tribal or any other Eurasian groups. We conclude that paternal lineages of Indian caste groups are primarily descended from Indo-European speakers who migrated from central Asia approximately 3,500 years ago. Conversely, paternal lineages of tribal groups are predominantly derived from the original Indian gene pool. We also provide evidence for bidirectional male gene flow between caste and tribal groups. In comparison, caste and tribal groups are homogeneous with respect to mitochondrial DNA variation, which may reflect the sociocultural characteristics of the Indian caste society. PMID:14761656

Cordaux, Richard; Aunger, Robert; Bentley, Gillian; Nasidze, Ivane; Sirajuddin, S M; Stoneking, Mark

2004-02-01

340

LUNG MODEL CASTING TECHNIQUES FOR INTERSPECIES MORPHOMETRIC COMPARISONS  

EPA Science Inventory

Techniques have been developed for casting both solid and hollow lung models from lung specimens. These techniques have been used to make casts of rat, rabbit, baboon, and human lungs and may be used for other species. An air line at a positive pressure of 25 cm of water is conne...

341

Dynamic Water Modeling and Application of Billet Continuous Casting  

Microsoft Academic Search

The continuous casting process is used for solidifying molten steel into semi-finished steel. The technology of secondary cooling is extremely important for output of the casting machine and billet quality. A dynamic water model was introduced, including solidification model in the secondary cooling, feedforward control strategy based on continuous temperature measurement in tundish, and feedback control strategy based on surface

Wen-hong LIU; Zhi XIE; Zhen-ping JI; Biao WANG; Zhao-yi LAI; Guang-lin JIA

2008-01-01

342

Level Estimation in a Water Model of Continuous Casting  

Microsoft Academic Search

Fluctuations in the level of a physical model of a continuous casting mold were studied to determine the structure of the oscillations in the molten steel level. A water model of one third of scale of an actual continuous casting machine with a perfect control configuration was used in experiments. The liquid level in the mold is measured by recording

Francisco Sánchez; Raúl Miranda-Tello; Cesar Real-Ramírez; Luis Hoyos; Miguel Ramírez; Jesús González-Trejo

2010-01-01

343

Suppression of periodic disturbances in the continuous casting process  

Microsoft Academic Search

In the continuous casting process, the steel level in the mold is controlled using a stopper rod as the flow control actuator and a level sensor. Various control strategies are used in order to reduce the mold level fluctuations which strongly affect the surface quality of the final product. Indeed, under certain casting conditions, the plant is often disturbed by

K. Jabri; B. Bele; A. Mouchette; D. Dumur; E. Godoy

2008-01-01

344

Volume MLS Ray Casting Christian Ledergerber, Gael Guennebaud, Miriah Meyer,  

E-print Network

a high level of control over the function reconstruction, and allows for a tunable amount of data for ray casting continuous functions with transfer func- tions that include isosurfaces; and a systemVolume MLS Ray Casting Christian Ledergerber, Ga¨el Guennebaud, Miriah Meyer, Moritz B

Meyer, Miriah

345

Control design and implementation in continuous steel casting  

Microsoft Academic Search

Accurate control of the mold level in continuous casting is believed to be a key factor in improving the quality of the cast product. This paper describes an application of advanced control to this problem leading to a complete recommissioning of the mold level control system. Careful physical modeling identified smooth as well as nonsmooth nonlinearities in the process. Three

S. F. Graebe; G. C. Goodwin; G. Elsley

1995-01-01

346

MODELING OF POROSITY FORMATION AND FEEDING FLOW IN STEEL CASTING  

E-print Network

MODELING OF POROSITY FORMATION AND FEEDING FLOW IN STEEL CASTING Kent D. Carlson, Zhiping Lin pressure, feeding flow, and porosity formation and growth in steel castings during solidification nucleation, the amount of porosity that forms is determined from the continuity equation. This multi

Beckermann, Christoph

347

INTEGRATED DESIGN OF STEEL CASTINGS FOR SERVICE PERFORMANCE  

E-print Network

. Similarly, there are no guidelines relating non-destructive testing or non- destructive examination (NDT that castings pass specified NDT standards without knowing exactly how this translates to part performance that integrates knowledge about the effects of porosity into casting design, production and NDT is the goal

Beckermann, Christoph

348

126. EXTERIOR VIEW, LOOKING NORTH, SHOWING CAST SHED NO. 2, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

126. EXTERIOR VIEW, LOOKING NORTH, SHOWING CAST SHED NO. 2, FURNACE NO. 2, STOVES, POWER HOUSE, STACKS, FURNACE NO. 1 CAST SHED. FURNACE NO. 2 IS IN PROCESS OF RESTORATION. - Sloss-Sheffield Steel & Iron, First Avenue North Viaduct at Thirty-second Street, Birmingham, Jefferson County, AL

349

A method for signature casting on digital images  

Microsoft Academic Search

Signature (watermark) casting on digital images is an important problem, since it affects many aspects of the information market. We propose a method for casting digital watermarks on images and we analyze its effectiveness. The satisfaction of some basic demands in this area is examined and a method for producing digital watermarks is proposed. Moreover, immunity to subsampling is examined

I. Pitas

1996-01-01

350

21. GENERAL INTERIOR VIEW OF CARRIE No. 3 CAST HOUSE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

21. GENERAL INTERIOR VIEW OF CARRIE No. 3 CAST HOUSE SHOWING BUSTLE PIPE AND TUYERES OF FURNACE No. 3. THE DOUBLE TRUSSING OF THE CAST HOUSE ROOF IS ALSO VISIBLE. - U.S. Steel Homestead Works, Blast Furnace Plant, Along Monongahela River, Homestead, Allegheny County, PA

351

The Childhood Autism Spectrum Test (CAST): Sex Differences  

ERIC Educational Resources Information Center

The Childhood Autism Spectrum Test (CAST) (formally known as the Childhood Asperger Screening Test) identifies autism spectrum conditions by measuring social and communication skills. The present study explored the sex distribution of scores. The CAST was distributed to 11,635 children aged 4-9 years in Cambridgeshire primary schools (UK). 3,370…

Williams, Joanna G.; Allison, Carrie; Scott, Fiona J.; Bolton, Patrick F.; Baron-Cohen, Simon; Matthews, Fiona E.; Brayne, Carol

2008-01-01

352

The Childhood Asperger Syndrome Test (Cast): Test--Retest Reliability  

ERIC Educational Resources Information Center

The Childhood Asperger Syndrome Test (CAST) is a 37-item parental self-completion questionnaire to screen for autism spectrum conditions in research. Good test accuracy was demonstrated in studies with primary school aged children in mainstream schools. The aim of this study was to investigate the test-retest reliability of the CAST. Parents of…

Williams, Jo; Allison, Carrie; Scott, Fiona; Stott, Carol; Bolton, Patrick; Baron-Cohen, Simon; Brayne, Carol

2006-01-01

353

AERIAL VIEW OF MC WANE CAST IRON PIPE, LOOKING WEST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

AERIAL VIEW OF MC WANE CAST IRON PIPE, LOOKING WEST TO BIRMINGHAM CITY CENTER. I-20-59 RUNNING DIAGONALLY FROM RIGHT MIDDLE GROUND. L&N RAILROAD TRACKS IN FOREGROUND. - McWane Cast Iron Pipe, 1201 Vanderbilt Road, Birmingham, Jefferson County, AL

354

Reaction synthesis of carbide-reinforced cast iron  

Microsoft Academic Search

Cast irons have found widespread uses as a result of their comparative low cost and their diversity of engineering properties. The low coefficient of friction of grey cast iron has led to its use in applications involving sliding surfaces such as piston rings, cylinder bores and brake discs in the automotive industry. Good sliding wear resistance is therefore one of

A. Chrysanthou; N. W. Davies; J. Li; P. Tsakiropoulos; O. S. Chinyamakobvu

1996-01-01

355

QUENCHING TUMBLING MILL TUMBLES CASTINGS OVER EACH OTHER TO REMOVE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

QUENCHING TUMBLING MILL TUMBLES CASTINGS OVER EACH OTHER TO REMOVE RUNNERS AND SPRUES WHILE QUICKLY COOLING THEM WITH WATER IN THE MALLEABLE ANNEALING BUILDING. THIS PROCESS ENSURES CASTINGS FORM WHITE IRON PRIOR TO BEING ASSEMBLED. - Stockham Pipe & Fittings Company, Malleable Annealing Building, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL

356

AUTOMATED MALLEABLE ANNEALING OVENS SLOWLY HEAT AND COOL CASTINGS AS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

AUTOMATED MALLEABLE ANNEALING OVENS SLOWLY HEAT AND COOL CASTINGS AS THEY MOVE IN BINS ALONG TRACKS IN THE OVEN BOTTOM IN THE MALLEABLE ANNEALING BUILDING. THIS PROCESS TRANSFORMS BRITTLE WHITE IRON CASTINGS INTO SOFTER, STRONGER MALLEABLE IRON. - Stockham Pipe & Fittings Company, Malleable Annealing Building, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL

357

8. VIEW OF A MOLD FOR PRECISION CASTING. THE MOLD ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. VIEW OF A MOLD FOR PRECISION CASTING. THE MOLD WAS USED IN FOUNDRY OPERATIONS THAT CAST PLUTONIUM EITHER AS INGOTS SUITABLE FOR ROLLING AND FURTHER WROUGHT PROCESSING OR INTO SHAPES AMENABLE TO DIRECT MACHINING OPERATIONS. (5/6/59) - Rocky Flats Plant, Plutonium Fabrication, Central section of Plant, Golden, Jefferson County, CO

358

Thermal stresses in aluminium alloy die casting dies  

Microsoft Academic Search

The aim of this research is to analyze the influence of Aluminium Alloy die casting parameters, die material, and die geometry on in-service tool life. An innovative immersion testing apparatus is developed, at which Aluminium Alloy die casting is simulated. It enables controlled thermal fatigue cycling. Special specimens with different edge geometry and specimens with maraging steel welds deposited by

Damjan Klob?ar; Janez Tušek

2008-01-01

359

Production scheduling in a steelmaking-continuous casting plant  

Microsoft Academic Search

In this paper we describe an optimization procedure for planning the production of steel ingots in a steelmaking-continuous casting plant. The strict requirements of the production process defeated most of the earlier approaches to steelmaking-continuous casting production scheduling, mainly due to the lack of information in the optimization models. Our formulation of the problem is based on the alternative graph,

Dario Pacciarelli; Marco Pranzo

2004-01-01

360

91. VIEW NORTHWEST OF SCRAP HOUSE AND CAST HOUSE, BUILDINGS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

91. VIEW NORTHWEST OF SCRAP HOUSE AND CAST HOUSE, BUILDINGS 101 AND 72; BUILDING 101 IN THE CENTER OF THE PHOTOGRAPH HOUSED SCRAP METAL CLEANING AND PROCESSING FACILITIES; BUILDING 72 AT RIGHT CENTER HOUSED MELTING FURNACES AND CONTINUOUS CASTING MACHINERY - Scovill Brass Works, 59 Mill Street, Waterbury, New Haven County, CT

361

De\\/geneticizing Caste: Population Genetic Research in South Asia  

Microsoft Academic Search

Recent years have witnessed a number of population genetics studies aiming to explore the ‘genetic profile’ of the South Asian population and of the caste system. This paper examines four genetic studies and their mass media representations, and discusses interviews with leading historians and social scientists whose work has focused on issues of the caste system. Similar to earlier commentators—from

Yulia Egorova

2009-01-01

362

MicroCast: Cooperative Video Streaming on Smartphones Lorenzo Keller  

E-print Network

MicroCast: Cooperative Video Streaming on Smartphones Lorenzo Keller School of I&C EPFL, Lausanne lends itself to cooperation. We propose a novel cooperative scheme, called Micro- Cast, for video, MicroDownload, that decides which parts of the video each phone should down- load from the server, based

Markopoulou, Athina

363

My shadow, myself: Cast-body shadows are embodied  

PubMed Central

Objects that serve as extensions of the body can produce a sensation of embodiment, feeling as if they are a part of us. We investigated the characteristics that drive an object’s embodiment, examining whether cast-body shadows, a purely visual stimulus, can become embodied. Tools are represented as an extension of the body when they enable observers to interact with distant targets, perceptually distorting space. We examined if perceptual distortion would also result from exposure to cast-body shadows in two separate distance estimation perceptual matching tasks. If observers represent cast-body shadows as extensions of their bodies, then when these shadows extend toward a target, it should appear closer than when no shadow is present (Experiment 1) or when a non cast-body shadow is cast toward a target (Experiment 2). We found perceptual distortions in both cast-body shadow and tool-use conditions, but not in our non cast-body shadow condition. These results suggest that, although cast-body shadows do not enable interaction with objects or provide direct tactile feedback, observers nonetheless represent their shadows as if they were a part of them. PMID:24243137

Kuylen, Christopher; Balas, Benjamin; Thomas, Laura E.

2014-01-01

364

RAW COPPER SLABS USED IN CASTING OPERATIONS AT BUFFALO PLANT ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

RAW COPPER SLABS USED IN CASTING OPERATIONS AT BUFFALO PLANT OF AMERICAN BRASS COMPANY. MATERIALS STORAGE FOR THE CAST SHOP NOW OCCUPIES A PORTION OF THE ORIGINAL BRASS MILL BUILT BY THE BUFFALO COPPER AND BRASS ROLLING MILL IN 1906-07 AND EXPANDED IN 1911. - American Brass Foundry, 70 Sayre Street, Buffalo, Erie County, NY

365

Energy Saving Melting andRevert Reduction Technology (E0SMARRT): Predicting Pattern Tooling and Casting Dimension for Investment Casting  

SciTech Connect

The investment casting process is an expendable mold process where wax patterns of the part and rigging are molded, assembled, shelled and melted to produce a ceramic mold matching the shape of the component to be cast. Investment casting is an important manufacturing method for critical parts because of the ability to maintain dimensional shape and tolerances. However, these tolerances can be easily exceeded if the molding components do not maintain their individual shapes well. In the investment casting process there are several opportunities for the final casting shape to not maintain the intended size and shape, such as shrinkage of the wax in the injection tool, the modification of the shape during shell heating, and with the thermal shrink and distortion in the casting process. Studies have been completed to look at the casting and shell distortions through the process in earlier phases of this project. Dr. Adrian Sabau at Oak Ridge National Labs performed characterizations and validations of 17-4 PH stainless steel in primarily fused silica shell systems with good agreement between analysis results and experimental data. Further tasks provided material property measurements of wax and methodology for employing a viscoelastic definition of wax materials into software. The final set of tasks involved the implementation of the findings into the commercial casting analysis software ProCAST, owned and maintained by ESI Group. This included: o the transfer of the wax material property data from its raw form into separate temperature-dependent thermophysical and mechanical property datasets o adding this wax material property data into an easily viewable and modifiable user interface within the pre-processing application of the ProCAST suite, namely PreCAST o and validating the data and viscoelastic wax model with respect to experimental results

Nick Cannell; Dr. Mark Samonds; Adi Sholapurwalla; Sam Scott

2008-11-21

366

Grain Refinement of Permanent Mold Cast Copper Base Alloys  

SciTech Connect

Grain refinement is a well established process for many cast and wrought alloys. The mechanical properties of various alloys could be enhanced by reducing the grain size. Refinement is also known to improve casting characteristics such as fluidity and hot tearing. Grain refinement of copper-base alloys is not widely used, especially in sand casting process. However, in permanent mold casting of copper alloys it is now common to use grain refinement to counteract the problem of severe hot tearing which also improves the pressure tightness of plumbing components. The mechanism of grain refinement in copper-base alloys is not well understood. The issues to be studied include the effect of minor alloy additions on the microstructure, their interaction with the grain refiner, effect of cooling rate, and loss of grain refinement (fading). In this investigation, efforts were made to explore and understand grain refinement of copper alloys, especially in permanent mold casting conditions.

M.Sadayappan; J.P.Thomson; M.Elboujdaini; G.Ping Gu; M. Sahoo

2005-04-01

367

Prediction of ALLOY SHRINKAGE FACTORS FOR THE INVESTMENT CASTING PROCESS  

SciTech Connect

This study deals with the experimental measurements and numerical predictions of alloy shrinkage factors (SFs) related to the investment casting process. The dimensions of the A356 aluminum alloy casting were determined from the numerical simulation results of solidification, heat transfer, fluid dynamics, and deformation phenomena. The investment casting process was carried out using wax patterns of unfilled wax and shell molds that were made of fused silica with a zircon prime coat. The dimensions of the die tooling, wax pattern, and casting were measured, in order to determine the actual tooling allowances. Several numerical simulations were carried out, to assess the level of accuracy for the casting shrinkage. The solid fraction threshold, at which the transition from the fluid dynamics to the solid dynamics occurs, was found to be important in predicting shrinkage factors (SFs). It was found that accurate predictions were obtained for all measued dimensions when the shell mold was considered a deformable material.

Sabau, Adrian S [ORNL

2006-01-01

368

Gating of Permanent Molds for Aluminum Casting  

SciTech Connect

This report summarizes a two-year project, DE-FC07-011D13983 that concerns the gating of aluminum castings in permanent molds. The main goal of the project is to improve the quality of aluminum castings produced in permanent molds. The approach taken was to determine how the vertical type gating systems used for permanent mold castings can be designed to fill the mold cavity with a minimum of damage to the quality of the resulting casting. It is evident that somewhat different systems are preferred for different shapes and sizes of aluminum castings. The main problems caused by improper gating are entrained aluminum oxide films and entrapped gas. The project highlights the characteristic features of gating systems used in permanent mold aluminum foundries and recommends gating procedures designed to avoid common defects. The study also provides direct evidence on the filling pattern and heat flow behavior in permanent mold castings. Equipment and procedure for real time X-Ray radiography of molten aluminum flow into permanent molds have been developed. Other studies have been conducted using water flow and behavior of liquid aluminum in sand mold using real time photography. This investigation utilizes graphite molds transparent to X-Rays making it possible to observe the flow pattern through a number of vertically oriented grating systems. These have included systems that are choked at the base of a rounded vertical sprue and vertical gating systems with a variety of different ingates into the bottom of a mold cavity. These systems have also been changed to include gating systems with vertical and horizontal gate configurations. Several conclusions can be derived from this study. A sprue-well, as designed in these experiments, does not eliminate the vena contracta. Because of the swirling at the sprue-base, the circulating metal begins to push the entering metal stream toward the open runner mitigating the intended effect of the sprue-well. Improved designs of sprue-wells should be evaluated. In order for a runner extension to operate efficiently, it must have a small squared cross-section. If it is tapered, the first metal to enter the first metal to enter the system is not effectively trapped. If the cross section is large, there is less turbulence when the aluminum enters the mold cavity in comparison to the smaller cross sectioned, squared runner. However, a large runner reduces yield. In bottom-feeding gating systems, a filter can significantly improve the filling of the casting. The filter helps to slow the metal flow rate enough to reduce jetting into the mold cavity. In top feeding gating systems, a filter can initially slow the metal flow rate, but because the metal drops after passing the filter, high velocities are achieved during free fall when a filter is in place. Side feeding gating systems provide less turbulent flow into the mold cavity. The flow is comparable to a bottom-feeding gating system with a filter. Using properly designed side-gating system instead of a bottom-feeding system with a filter can potentially save the cost of the filter. Rough coatings promote better fill than smooth coatings. This conclusion seems at first counter intuitive. One tends to assume a rough coating creates more friction resistance to the flow of molten metal. In actuality the molten aluminum stream flows inside an oxide film envelope. When this film rests on top of the ridges of a rough coating the microscopic air pockets between the coating and the oxide film provide more thermal insulation than in a smooth coating. This insulation promotes longer feeding distances in the mold as demonstrated in the experiments. Much of this work is applicable to vertically parted sand molds as well, although the heat transfer conditions do vary from a metal mold generally used in permanent molding of aluminum. The flow measurements were conducted using graphite molds and real time X-Ray radiography recorded at a rate of 30 images per second through those molds. The facilities at Arrow Aluminum Foundry were used in the study. The resu

David Schwam; John F. Wallace; Tom Engle; Qingming Chang

2004-01-01

369

Relationship Between Casting Distortion, Mold Filling, and Interfacial Heat Transfer in Sand Molds  

SciTech Connect

This project sought to determine the relationship between casting dimensions and interfacial heat transfer in aluminum alloy sand castings. The program had four parts; measurement of interfacial heat transfer coefficients in resin bonded and green sand molds, the measurement of gap formation in these molds, the analysis of castings made in varying gatings, orientations and thicknesses, and the measurement of residual stresses in castings in the as-cast and gate removed condition. New values for interfacial heat transfer coefficients were measured, a novel method for gap formation was developed, and the variation of casting dimensions with casting method, gating, and casting orientation in the mold was documented.

J. K. Parker; K. A. Woodbury; T. S. Piwonka; Y. Owusu

1999-09-30

370

Elevated temperature mechanical properties and microstructures of high pressure die cast magnesium AZ91 alloy cast with different section thicknesses  

Microsoft Academic Search

This paper investigates the influence of variations in the microstructure of high pressure die cast AZ91 on the elevated temperature mechanical properties of the alloy. Thinner-walled high pressure die castings show an improvement in elevated temperature strength, ductility and creep resistance. Further improvements to the creep resistance were achieved by ageing the alloy prior to creep testing. It appears that

M. S. Dargusch; M. A. Easton; S. M. Zhu; G. Wang

2009-01-01

371

Development of low-temperature high-strength integral steel castings for offshore construction by casting process engineering  

NASA Astrophysics Data System (ADS)

In casting steels for offshore construction, manufacturing integral casted structures to prevent fatigue cracks in the stress raisers is superior to using welded structures. Here, mold design and casting analysis were conducted for integral casting steel. The laminar flow of molten metal was analyzed and distributions of hot spots and porosities were studied. A prototype was subsequently produced, and air vents were designed to improve the surface defects caused by the release of gas. A radiographic test revealed no internal defects inside the casted steel. Evaluating the chemical and mechanical properties of specimens sampled from the product revealed that target values were quantitatively satisfied. To assess weldability in consideration of repair welding, the product was machined with grooves and welded, after which the mechanical properties of hardness as well as tensile, impact, and bending strengths were evaluated. No substantive differences were found in the mechanical properties before and after welding.

Lim, Sang-Sub; Mun, Jae-Chul; Kim, Tae-Won; Kang, Chung-Gil

2014-12-01

372

Microstructural Characterization of Cast Metallic Transmutation Fuels  

SciTech Connect

As part of the Global Nuclear Energy Partnership (GNEP) and the Advanced Fuel Cycle Initiative (AFCI), the US Department of Energy (DOE) is participating in an international collaboration to irradiate prototypic actinide-bearing transmutation fuels in the French Phenix fast reactor (FUTURIX-FTA experiment). The INL has contributed to this experiment by fabricating and characterizing two compositions of metallic fuel; a non-fertile 48Pu-12Am-40Zr fuel and a low-fertile 35U-29Pu-4Am-2Np-30Zr fuel for insertion into the reactor. This paper highlights results of the microstructural analysis of these cast fuels, which were reasonably homogeneous in nature, but had several distinct phase constituents. Spatial variations in composition appeared to be more pronounced in the low-fertile fuel when compared to the non-fertile fuel.

J. I. Cole; D. D. Keiser; J. R. Kennedy

2007-09-01

373

Casting inorganic structures with DNA molds.  

PubMed

We report a general strategy for designing and synthesizing inorganic nanostructures with arbitrarily prescribed three-dimensional shapes. Computationally designed DNA strands self-assemble into a stiff "nanomold" that contains a user-specified three-dimensional cavity and encloses a nucleating gold "seed." Under mild conditions, this seed grows into a larger cast structure that fills and thus replicates the cavity. We synthesized a variety of nanoparticles with 3-nanometer resolution: three distinct silver cuboids with three independently tunable dimensions, silver and gold nanoparticles with diverse cross sections, and composite structures with homo- and heterogeneous components. The designer equilateral silver triangular and spherical nanoparticles exhibited plasmonic properties consistent with electromagnetism-based simulations. Our framework is generalizable to more complex geometries and diverse inorganic materials, offering a range of applications in biosensing, photonics, and nanoelectronics. PMID:25301973

Sun, Wei; Boulais, Etienne; Hakobyan, Yera; Wang, Wei Li; Guan, Amy; Bathe, Mark; Yin, Peng

2014-11-01

374

Modeling wear of cast Ti alloys  

PubMed Central

The wear behavior of Ti-based alloys was analyzed by considering the elastic–plastic fracture of individual alloys in response to the relevant contact stress field. Using the contact stresses as the process driving force, wear was computed as the wear rate or volume loss as a function of hardness and tensile ductility for Ti-based cast alloys containing an ?, ?+? or ? microstructure with or without the intermetallic precipitates. Model predictions indicated that wear of Ti alloys increases with increasing hardness but with decreasing fracture toughness or tensile ductility. The theoretical results are compared with experimental data to elucidate the roles of microstructure in wear and contrasted against those in grindability. PMID:17224314

Chan, Kwai S.; Koike, Marie; Okabe, Toru

2007-01-01

375

TiC reinforced cast Cr steels  

SciTech Connect

A new class of materials, namely TiC-reinforced cast chromium (Cr) steels, was developed for applications requiring high abrasion resistance and good fracture toughness. The research approach was to modify the carbide structure of commercial AISI 440C steel for better fracture resistance while maintaining the already high abrasion resistance. The new alloys contained 12Cr, 2.5–4.5Ti, and 1–1.5C (wt.%) and were melted in a vacuum induction furnace. Their microstructure was composed primarily of a martensitic matrix with a dispersion of TiC precipitates. Modification of TiC morphology was accomplished through changing the cooling rate during solidification. Wear rates of the TiC-reinforced Cr steels were comparable to that of AISI 440C steel, but the impact resistance was much improved.

Dogan, O.N.; Hawk, J.A.; Schrems, K.K.

2006-06-01

376

General requirement for effective overburden casting  

SciTech Connect

Effective overburden casting requires the efficient use of todays explosives and initiations systems if a mine is to survive. This paper uses a major coal stripping operation as an example of the proper application of explosives and initiation system to their conditions. High speed photography, rock analysis and computer modeling were used to assist in determining the effective use of the explosives and the initiation systems. The high speed photography confirmed the computer modeling done by SABREX, the Scientific Approach to Blasting Rock with Explosives developed by ICI Explosives world group of companies. The major coal company used in this paper mines the 36 inch Sewanee coal seam in Tennessee for TVA steam generation. The overburden is usually in excess of 100 ft. of sandstone.

Cook, J.D. [Tennessee Nitrate Technology, Inc., Dunlap, TN (United States); McCutchen, D. [ICI Explosives USA Inc., Roswell, GA (United States)

1994-12-31

377

FInal Report - Investment Casting Shell Cracking  

SciTech Connect

This project made a significant contribution to the understanding of the investment casting shell cracking problem. The effects of wax properties on the occurrence of shell cracking were demonstrated and can be measured. The properties measured include coefficient of thermal expansion, heating rate and crystallinity of the structure. The important features of production molds and materials properties have been indicated by case study analysis and fractography of low strength test bars. It was found that stress risers in shell cavity design were important and that typical critical flaws were either oversize particles or large pores just behind the prime coat. It was also found that the true effect of fugitive polymer fibers was not permeability increase, but rather a toughening mechanism due to crack deflection.

Von Richards

2003-12-01

378

Method of casting silicon into thin sheets  

DOEpatents

Silicon (Si) is cast into thin shapes within a flat-bottomed graphite crucible by providing a melt of molten Si along with a relatively small amount of a molten salt, preferably NaF. The Si in the resulting melt forms a spherical pool which sinks into and is wetted by the molten salt. Under these conditions the Si will not react with any graphite to form SiC. The melt in the crucible is pressed to the desired thinness with a graphite tool at which point the tool is held until the mass in the crucible has been cooled to temperatures below the Si melting point, at which point the Si shape can be removed.

Sanjurjo, Angel (San Jose, CA); Rowcliffe, David J. (Los Altos, CA); Bartlett, Robert W. (Tucson, AZ)

1982-10-26

379

Thin section casting program: Volume 3, Vertical TSC (thin-section casting) approach: Final report  

SciTech Connect

A prototype vertical twin belt caster was designed, constructed and tested at Bethlehem Steel Corporation's Homer Research Laboratory for the development of a thin section casting process. In the prototype caster the moving mold was aligned vertically and each of the two endless steel belts was tensioned around an upper and a lower large pulley by means of a third smaller pulley. The mold consisted of a long parallel lower section and a shorter V-shaped top section into which liquid steel was fed from a tundish via a submerged refractory nozzle. Mold length, defined as the distance from the meniscus in the V-mouth to the tangent point of the lower pulleys, was about eleven feet. The length of the V-mouth was 27 in. The belts were continuously supported between the upper and lower pulleys by a unique back-up system. Downstream support consisted of two pairs of foot rolls and a vertical water-cooled steel structure that would permit a cast length of about nineteen feet. A chain driven bar was used to start a cast and support the slab. The aim was to cast 1 in. /times/ 17 in. sections at 250 in./min. The details of the prototype vertical caster, except the end walls, are given. The water modeling studies conducted at USSteel to establish tundish nozzle port sizes, inclinations and depth of submergence below the meniscus for optimum flow pattern in the V-mouth are included. The design analyses of the copper end walls and the 10-ton liquid steel trials conducted with the refractory end walls are presented. The fourteen liquid steel trials conducted with the vertical caster and the concluding remarks on vertical feeding system development are discussed.

Not Available

1989-01-01

380

Dental Casting Technic: Theory and PracticeA Report To the Research Commission of the American Dental Association  

Microsoft Academic Search

This paper gives the results of a number of dental casting experiments, showing effects of physical properties of the materials used in the casting process upon the finished casting. The dimensions of the castings are shown to be changed by the type of investment, casting temperature, water-powder ratio of the investment, and the treatment of the wax pattern. Castings are

Geo C. Paffenbarger; W. T. Sweeney

1931-01-01

381

The Caries Assessment Spectrum and Treatment (CAST) instrument: construct validation.  

PubMed

The Caries Assessment Spectrum and Treatment (CAST) is a newly developed epidemiological instrument. The aim of this study was to investigate its construct validity. Four calibrated examiners, using CAST codes 0-6, visually examined 109 surfaces of extracted and exfoliated teeth. These teeth were then hemisectioned, photographed, and assessed histologically by two calibrated examiners using the Downer criteria. Twenty-eight of the 109 teeth were scanned using micro-computed tomography (micro-CT) and assessed by the same examiners using the same criteria. Validation was determined through calculation of the sensitivity, specificity, and Youden index for two categories of carious lesions examined visually, with histology and micro-CT as gold standards. Interexaminer consistency was ? = 0.76: SE ± 0.05 between visual and histological assessments of teeth and was ? = 0.89: SE ± 0.08 between visual and micro-CT assessments. For the category 'healthy' vs. 'diseased' (CAST codes 0-2 vs. CAST codes 3-6), sensitivity, specificity, and Youden index values of 100%, 92.9%, and 93%, respectively, for micro-CT, and 96.6%, 86%, and 83%, respectively, for histology, were obtained. For the category 'dentine' vs. 'non-dentine lesions' (CAST codes 0-3 vs. CAST codes 4-6) sensitivity, specificity, and Youden index values of 90%, 100%, and 90%, respectively, for micro-CT, and 81.4%, 100%, and 81%, respectively, for histology, were obtained. Construct validity of the CAST instrument was obtained. PMID:24533906

de Souza, Ana L; Leal, Soraya C; Chaves, Sacha B; Bronkhorst, Ewald M; Frencken, Jo E; Creugers, Nico H J

2014-04-01

382

Fluid flow and heat transfer modeling for castings  

SciTech Connect

Casting is fundamental to manufacturing of many types of equipment and products. Although casting is a very old technology that has been in existence for hundreds of years, it remains a highly empirical technology, and production of new castings requires an expensive and time-consuming trial-and-error approach. In recent years, mathematical modeling of casting has received increasing attention; however, a majority of the modeling work has been in the area of heat transfer and solidification. Very little work has been done in modeling fluid flow of the liquid melt. This paper presents a model of fluid flow coupled with heat transfer of a liquid melt for casting processes. The model to be described in this paper is an extension of the COMMIX code and is capable of handling castings with any shape, size, and material. A feature of this model is the ability to track the liquid/gas interface and liquid/solid interface. The flow of liquid melt through the sprue and runners and into the mold cavity is calculated as well as three-dimensional temperature and velocity distributions of the liquid melt throughout the casting process. 14 refs., 13 figs.

Domanus, H.M.; Liu, Y.Y.; Sha, W.T.

1986-01-01

383

Development of a thin steel strip casting process. Final report  

SciTech Connect

This is a comprehensive effort to develop direct strip casting to the point where a pilot scale program for casting carbon steel strip could be initiated. All important aspects of the technology were being investigated, however the program was terminated early due to a change in the business strategy of the primary contractor, Armco Inc. (focus to be directed at specialty steels, not low carbon steel). At termination, the project was on target on all milestones and under budget. Major part was casting of strip at the experiment casting facility. A new caster, capable of producing direct cast strip of up to 12 in. wide in heats of 1000 and 3000 lb, was used. A total of 81 1000-1200 lb heats were cast as well as one test heat of 3000 lb. Most produced strip of from 0.016 to 0.085 in. thick. Process reliability was excellent for short casting times; quality was generally poor from modern hot strip mill standards, but the practices necessary for good surface quality were identified.

Williams, R.S.

1994-04-01

384

Development of a CFD code for casting simulation  

NASA Technical Reports Server (NTRS)

Because of high rejection rates for large structural castings (e.g., the Space Shuttle Main Engine Alternate Turbopump Design Program), a reliable casting simulation computer code is very desirable. This code would reduce both the development time and life cycle costs by allowing accurate modeling of the entire casting process. While this code could be used for other types of castings, the most significant reductions of time and cost would probably be realized in complex investment castings, where any reduction in the number of development castings would be of significant benefit. The casting process is conveniently divided into three distinct phases: (1) mold filling, where the melt is poured or forced into the mold cavity; (2) solidification, where the melt undergoes a phase change to the solid state; and (3) cool down, where the solidified part continues to cool to ambient conditions. While these phases may appear to be separate and distinct, temporal overlaps do exist between phases (e.g., local solidification occurring during mold filling), and some phenomenological events are affected by others (e.g., residual stresses depend on solidification and cooling rates). Therefore, a reliable code must accurately model all three phases and the interactions between each. While many codes have been developed (to various stages of complexity) to model the solidification and cool down phases, only a few codes have been developed to model mold filling.

Murph, Jesse E.

1993-01-01

385

Predicting Pattern Tooling and Casting Dimensions for Investment Casting, Phase III  

SciTech Connect

Efforts during Phase III focused mainly on the shell-alloy systems. A high melting point alloy, 17-4PH stainless steel, was considered. The experimental part of the program was conducted at ORNL and commercial foundries, where wax patterns were injected, molds were invested, and alloys were poured. Shell molds made of fused-silica and alumino-silicates were considered. A literature review was conducted on thermophysical and thermomechanical properties alumino-silicates. Material property data, which were not available from material suppliers, was obtained. For all the properties of 17-4PH stainless steel, the experimental data available in the literature did not cover the entire temperature range necessary for process simulation. Thus, some material properties were evaluated using ProCAST, based on CompuTherm database. A comparison between the predicted material property data and measured property data was made. It was found that most material properties were accurately predicted only over several temperature ranges. No experimental data for plastic modulus were found. Thus, several assumptions were made and ProCAST recommendations were followed in order to obtain a complete set of mechanical property data at high temperatures. Thermal expansion measurements for the 17-4PH alloy were conducted during heating and cooling. As a function of temperature, the thermal expansion for both the alloy and shell mold materials showed different evolution on heating and cooling. Numerical simulations were performed using ProCAST for the investment casting of 17-4PH stainless steel parts in fused silica molds using the thermal expansion obtained on heating and another one with thermal expansion obtained on cooling. Since the fused silica shells had the lowest thermal expansion properties in the industry, the dewaxing phase, including the coupling between wax-shell systems, was neglected. The shell mold was considered to be a pure elastic material. The alloy dimensions were obtained from numerical simulations. For 17-4PH stainless steel parts, the alloy shrinkage factors were over-predicted, as compared with experimental data. Additional R&D focus was placed on obtaining material property data for filled waxes, waxes that are common in the industry. For the first time in the investment casting industry, the thermo-mechanical properties of unfilled and filled waxes were measured. Test specimens of three waxes were injected at commercial foundries. Rheometry measurement of filled waxes was conducted at ORNL. The analysis of the rheometry data to obtain viscoelastic properties was not completed due to the reduction in the budget of the project (approximately 50% funds were received).

Sabau, Adrian S [ORNL

2008-04-01

386

Stress Corrosion Cracking Behavior of Cast Stainless Steels  

SciTech Connect

Casting of austenitic stainless steels offers the possibility of directly producing large and/or relatively complex structures, such as the first wall shield modules or the diverter cassette for the ITER fusion reactor. Casting offers major cost savings when compared to fabrication via welding of quarter modules machined from large forgings. However, the strength properties of such cast components are typically considered inferior to those of conventionally forged and annealed components. To improve and validate cast stainless steel as a substitute for wrought stainless steel, a development and testing program was initiated, utilizing nitrogen and manganese additions to promote improved performance. This paper focuses on the response of the first set of developmental alloys to neutron-irradiation and susceptibility to stress corrosion cracking. These cast materials may also have applications for different components in light water reactors. Results showed that all steels exhibited irradiation-induced hardening and a corresponding drop in ductility, as expected, although there is still considerable ductility in the irradiated samples. The cast steels all exhibited reduced hardening in comparison to a wrought reference steels, which may be related to a larger grain size. Higher nitrogen contents did not negatively influence irradiation performance. Regarding stress corrosion cracking susceptibility, the large difference in grain size limits the comparison between wrought and cast materials, and inclusions in a reference and archive cast alloy tests complicate analysis of these samples. Results suggest that the irradiated archive heat was more susceptible to cracking than the modified alloys, which may be related to the more complex microstructure. Further, the results suggest that the modified cast steel is at least as SCC resistant as wrought 316LN. The beneficial effect of nitrogen on the mechanical properties of the alloys remains after irradiation and is not detrimental to SCC resistance.

Teysseyre, Sebastien [University of Michigan; Busby, Jeremy T [ORNL; Was, Gary [University of Michigan

2009-01-01

387

Advanced rotary engine components utilizing fiber reinforced Mg castings  

NASA Technical Reports Server (NTRS)

Under a two-phase program sponsored by NASA, the technology for producing advanced rotary engine components utilizing graphite fiber-reinforced magnesium alloy casting is being developed. In Phase I, the successful casting of a simulated intermediate housing was demonstrated. In Phase II, the goal is to produce an operating rotor housing. The effort involves generation of a material property data base, optimization of parameters, and development of wear- and corrosion-resistant cast surfaces and surface coatings. Results to date are described.

Goddard, D.; Whitman, W.; Pumphrey, R.; Lee, C.-M.

1986-01-01

388

Rheology of composite solid propellants during motor casting  

NASA Technical Reports Server (NTRS)

In a study conducted to evaluate flow parameters of uncured solid composite propellants during motor casting, two motors (1.8M-lb grain wt) were cast with a PBAN propellant exhibiting good flow characteristics in a 260-in. dia solid rocket motor. Attention is given to the effects of propellant compositional and processing variables on apparent viscosity as they pertain to rheological behavior and grain defect formation during casting. It is noted that optimized flow behavior is impaired with solid propellant loading. Non-Newtonian pseudoplastic flow is observed, which is dependent upon applied shear stress and the age of the uncured propellant.

Rogers, C. J.; Smith, P. L.; Klager, K.

1978-01-01

389

Hanford's Simulated Low Activity Waste Cast Stone Processing  

SciTech Connect

Cast Stone is undergoing evaluation as the supplemental treatment technology for Hanford’s (Washington) high activity waste (HAW) and low activity waste (LAW). This report will only cover the LAW Cast Stone. The programs used for this simulated Cast Stone were gradient density change, compressive strength, and salt waste form phase identification. Gradient density changes show a favorable outcome by showing uniformity even though it was hypothesized differently. Compressive strength exceeded the minimum strength required by Hanford and greater compressive strength increase seen between the uses of different salt solution The salt waste form phase is still an ongoing process as this time and could not be concluded.

Kim, Young

2013-08-20

390

Method to prevent/mitigate steam explosions in casting pits  

DOEpatents

Steam explosions can be prevented or mitigated during a metal casting process by the placement of a perforated flooring system in the casting pit. An upward flow of compressed gas through this perforated flooring system is introduced during the casting process to produce a buffer layer between any spilled molten metal and the cooling water in the reservoir. This buffer layer provides a hydrodynamic layer which acts to prevent or mitigate steam explosions resulting from hot, molten metal being spilled into or onto the cooling water. 3 figs.

Taleyarkhan, R.P.

1996-12-24

391

Method to prevent/mitigate steam explosions in casting pits  

DOEpatents

Steam explosions can be prevented or mitigated during a metal casting process by the placement of a perforated flooring system in the casting pit. An upward flow of compressed gas through this perforated flooring system is introduced during the casting process to produce a buffer layer between any spilled molten metal and the cooling water in the reservoir. This buffer layer provides a hydrodynamic layer which acts to prevent or mitigate steam explosions resulting from hot, molten metal being spilled into or onto the cooling water.

Taleyarkhan, Rusi P. (Knoxville, TN)

1996-01-01

392

Corrosive wear of cast iron under reciprocating lubrication  

SciTech Connect

In order to study the wear of cylinder bore fundamentally, a reciprocating friction tester was produced and utilized. The friction between a cast iron and a piston-ring and the wear of the cast iron were examined under the corrosive oil with sulphuric acid. The findings indicate that the friction and wear around TDC and BDC was confirmed to be greater than between these reversal points and the friction and wear around the reversal points increased with the sulphuric acid which has caused the deficiency of oil film and the corrosion of the cast iron.

Yahagi, Y.; Nagasawa, Y.; Hotta, S.; Mizutani, Y.

1986-01-01

393

Shrinkage Prediction for the Investment Casting of Stainless Steels  

SciTech Connect

In this study, the alloy shrinkage factors were obtained for the investment casting of 17-4PH stainless steel parts. For the investment casting process, unfilled wax and fused silica with a zircon prime coat were used for patterns and shell molds, respectively. Dimensions of the die tooling, wax pattern, and casting were measured using a Coordinate Measurement Machine in order to obtain the actual tooling allowances. The alloy dimensions were obtained from numerical simulation results of solidification, heat transfer, and deformation phenomena. The numerical simulation results for the shrinkage factors were compared with experimental results.

Sabau, Adrian S [ORNL

2007-01-01

394

Optimization of Squeeze Casting for Aluminum Alloy Parts  

SciTech Connect

This study was initiated with the installation of a new production size UBE 350 Ton VSC Squeeze Casting system in the Metal Casting Laboratory at Case Western University. A Lindberg 75k W electrical melting furnace was installed alongside. The challenge of installation and operation of such industrial-size equipment in an academic environment was met successfully. Subsequently, a Sterling oil die heater and a Visi-Track shot monitoring system were added. A significant number of inserts were designed and fabricated over the span of the project, primarily for squeeze casting different configurations of test bars and plates. A spiral ''ribbon insert'' for evaluation of molten metal fluidity was also fabricated. These inserts were used to generate a broad range of processing conditions and determine their effect on the quality of the squeeze cast parts. This investigation has studied the influence of the various casting variables on the quality of indirect squeeze castings primarily of aluminum alloys. The variables studied include gating design, fill time and fill patter, metal pressure and die temperature variations. The quality of the die casting was assessed by an analysis of both their surface condition and internal soundness. The primary metal tested was an aluminum 356 alloy. In addition to determining the effect of these casting variables on casting quality as measured by a flat plate die of various thickness, a number of test bar inserts with different gating designs have been inserted in the squeeze casting machine. The mechanical properties of these test bars produced under different squeeze casting conditions were measured and reported. The investigation of the resulting properties also included an analysis of the microstructure of the squeeze castings and the effect of the various structural constituents on the resulting properties. The main conclusions from this investigation are as follows: The ingate size and shape are very important since it must remain open until the casting is solidified and pressure is maintained on the solidifying casting. Fanned gates, particularly on the smaller section castings avoid jetting effects at the ingate end. The fan type ingate helps accomplish a rapid fill without high velocities. The molten metal has to fill the cavity before localized solidification occurs. This is best accomplished with a larger ingate to attain rapid filling without excessive velocity or jetting that occurs at high metal velocities. Straight gates are prone to case jetting of the metal stream even a low velocities. Fanned gates allow use of higher fill velocity without excessive jetting. A higher metal pressure provides a more complete fill of the die including improved compensation for solidification shrinkage. With the proper filling pattern, ingates, overflows and die temperature for a given die, very good tensile properties can be attained in squeeze casting. In general, the smaller squeeze castings require higher die temperatures. Computer models using the UES Procast and MagmaSoft finite element software can, after suitable adjustments, predict the flow pattern in the die cavity.

David Schwam; John F. Wallace; Qingming Chang; Yulong Zhu

2002-07-30

395

Hickey, W8010A casts 52-55,101-102, 201-202 Hickey, W8010A casts 52-55,101-202, page 1  

E-print Network

CTD052 Hickey, W8010A casts 52-55,101-102, 201-202 Hickey, W8010A casts 52-55,101-202, page 1 #12;CTD052 Hickey, W8010A casts 52-55,101-102, 201-202 Hickey, W8010A casts 52-55,101-202, page 2 #12;CTD052 Hickey, W8010A casts 52-55,101-102, 201-202 Hickey, W8010A casts 52-55,101-202, page 3 #12;CTD053

Hickey, Barbara

396

Fit of Porcelain Fused-to-metal Crown and Bridge Castings  

Microsoft Academic Search

The dimensional accuracy of porcelain fused to metal crown and bridge castings was determined on truncated cone-shaped steel dies. Ni-Cr castings produced in manufacturers' laboratories were consistently undersize, while precious metal castings were consistently oversize. Ni-Cr castings, produced in NBS laboratories using a modified investing technique, were routinely oversize.

G. T. Eden; O. M. Franklin; J. M. Powell; Y. Ohta; George Dickson

1979-01-01

397

Influence of alloy elements and pouring temperature on the fluidity of cast magnesium alloy  

Microsoft Academic Search

The fluidity is one of the most important properties for cast alloy. The quality of castings is influenced by the fluidity of liquid metal, especially under gravity casting conditions. In this paper, the factors affecting the fluidity of cast magnesium alloy have been studied by vacuum suction method. The experimental data show that the relationship between the fluidity of magnesium

Qin Hua; Deming Gao; Hongjun Zhang; Yuhui Zhang; Qijie Zhai

2007-01-01

398

Clean ferrous casting technology research. Final technical report, September 29, 1993--December 31, 1995  

SciTech Connect

This report details results of a 30-month program to develop methods of making clean ferrous castings, i.e., castings free of inclusions and surface defects. The program was divided into 3 tasks: techniques for producing clean steel castings, electromagnetic removal of inclusions from ferrous melts, and study of causes of metal penetration in sand molds in cast iron.

Piwonka, T.S. [ed.

1996-01-01

399

Caste, Class and the Love-Marriage: Social Change in India  

ERIC Educational Resources Information Center

The present study of a small town in rural West Bengal, India, reveals a number of "love-marriages" involving individuals from castes of distinctly different ranks in the local caste hierarchy. Despite the prevailing rule of caste endogamy, inter-caste couples appear to face little difficulty. (Author)

Corwin, Lauren A.

1977-01-01

400

The hormone-like effect of earthworm casts on plant growth  

Microsoft Academic Search

The fertilizing effect of earthworm casts depends on microbial metabolites, mainly growth regulators. The hormone-like effect of earthworm casts is discussed with reference to the literature and ad hoc experiments. When used in plant propagation, earthworm casts promote root initiation and root biomass and increase root percentage. When applied as a casing layer, earthworm casts stimulate carpophore formation in Agaricus

U. Tomati; A. Grappelli; E. Galli

1988-01-01

401

FATIGUE OF 8630 CAST STEEL IN THE PRESENCE OF SHRINKAGE POROSITY  

E-print Network

FATIGUE OF 8630 CAST STEEL IN THE PRESENCE OF SHRINKAGE POROSITY K.M. Sigl1 , R.A. Hardin2 , R cast having varying amounts of porosity. The specimen castings were designed using a computer model that predicts the location and volume percentages of porosity in castings with a sensitivity not yet offered

Beckermann, Christoph

402

Feasibility of investment casting preforms for phalanx penetrators. Report for June--November 1977  

Microsoft Academic Search

The objective of this program was to demonstrate, in a preliminary fashion, that depleted uranium 2 w\\/o molybdenum alloy Phalanx penetrators can be produced by the investment casting process and to provide cast penetrators for ballistic evaluation. Results of the work have shown that sound penetrators, free of internal voids, can be produced by investment casting. As-cast penetrators and penetrators

Tenerini

1977-01-01

403

Casting a Polyhedron with Directional Uncertainty Hee-kap Ahn Otfried Cheong Rene van Oostrum  

E-print Network

Casting a Polyhedron with Directional Uncertainty£ Hee-kap Ahn££ Otfried Cheong££ Ren´e van Oostrum££ Abstract Casting is a manufacturing process in which molten material is poured into a cast (mould), which with imperfect control of the casting machinery. In this paper, we consider directional uncertainty: given a 3

Utrecht, Universiteit

404

Journal of Membrane Science 205 (2002) 1121 Macrovoid pore formation in dry-cast cellulose acetate  

E-print Network

Journal of Membrane Science 205 (2002) 11­21 Macrovoid pore formation in dry-cast cellulose acetate of macrovoid (MV) pores formed during the dry-casting of cellulose acetate (CA)/acetone/water casting solutions were cast in low-gravity (low-g) (KC-135) and normal-gravity (1-g) (ground-based control) from CA

Shvartsman, Stanislav "Stas"

405

A Fourier Theory for Cast Shadows Ravi Ramamoorthi, Melissa Koudelka, and  

E-print Network

A Fourier Theory for Cast Shadows Ravi Ramamoorthi, Melissa Koudelka, and Peter Belhumeur Abstract--Cast canonical configurations like V-grooves. This paper takes a first step toward a formal analysis of cast and Fourier basis functions. Our analysis exposes the mathematical convolution structure of cast shadows

O'Brien, James F.

406

Quantification and Characterization of Regional Seismic Signals from Cast Blasting in Mines  

E-print Network

Quantification and Characterization of Regional Seismic Signals from Cast Blasting in Mines, 1996 LAUR-96-3747 Submitted to Geophys . J. Int. #12;2 Abstract Cast blasts in coal mines, designed developed a linear elastic model to simulate regional- distance seismograms from mining cast blasts. Cast

407

Factors contributing to the temperature beneath plaster or fiberglass cast material  

Microsoft Academic Search

BACKGROUND: Most cast materials mature and harden via an exothermic reaction. Although rare, thermal injuries secondary to casting can occur. The purpose of this study was to evaluate factors that contribute to the elevated temperature beneath a cast and, more specifically, evaluate the differences of modern casting materials including fiberglass and prefabricated splints. METHODS: The temperature beneath various types (plaster,

Michael J Hutchinson

2008-01-01

408

Understanding the Role Water-cooling Plays during Continuous Casting of Steel and Aluminum Alloys  

E-print Network

Understanding the Role Water-cooling Plays during Continuous Casting of Steel and Aluminum Alloys J Keywords: Steel, continuous casting, aluminum, Direct Chill casting, primary cooling, water the mold and solidifying metal during the continuous casting of steel and aluminum alloys

Thomas, Brian G.

409

Initial Development of Thermal and Stress Fields in Continuously Cast Steel Billets  

E-print Network

Initial Development of Thermal and Stress Fields in Continuously Cast Steel Billets J.E. KELLY, K to compute the thermomechanical state of the shell of continuously cast steels in a round billet casting mold in that alloy, as well as its susceptibility to cracking. I. INTRODUCTION CONTINUOUS casting now accounts

Thomas, Brian G.

410

Study of FES/CAST/HGS  

NASA Technical Reports Server (NTRS)

The microgravity materials processing program has been instrumental in providing the crystal growth community with an experimental environment to better understand the phenomena associated with the growing of crystals. In many applications one may pursue the growth of large single crystals which cannot be grown on earth due to convective driven flows. A microgravity environment is characterized by neither convection of buoyancy. Consequently superior crystals are able to be grown in space. On the other hand, since neither convection nor buoyancy dominates the fluid flow in a microgravity environment, then lesser dominating phenomena can affect crystal growth, such as surface driven flows or diffusion limited solidification. In the case of experiments that are to be flown in space using the Fluid Experiments System (FES), diffusion limited growth should be the dominating phenomenon. The use of holographic and Schlieren optical techniques for studying the concentration gradients in solidification processes has been used by several investigators over the years. The Holographic Ground System (HGS) facility at MSFC has been a primary resource in researching this capability. Consequently scientific personnel have been able to utilize these techniques in both ground based research and in space experiments. An important event in the scientific utilization of the HGS facilities was the TGS (triglycine sulfate) Crystal Growth and the Casting and Solidification Technology (CAST) experiments that were flown on the International Microgravity Lab (IML) mission in March of this year. The preparation and processing of these space observations are the primary experiments reported in this work. This project provides some ground-based studies to optimize on the holographic techniques used to acquire information about the crystal growth processes flown on IML. Since the ground-based studies will be compared with the space-based experimental results, it is necessary to conduct sufficient ground based studies to best determine how the experiment in space worked. The current capabilities in computer based systems for image processing and numerical computation have certainly assisted in those efforts. As anticipated, this study has certainly shown that these advanced computing capabilities are helpful in the data analysis of such experiments.

Workman, Gary L.; Cummings, Rick; Jones, Brian

1992-01-01

411

Simulation of continuous-casting process (reconsideration of heat balance and improvement of efficiency in continuous-casting process)  

SciTech Connect

A horizontal continuous-casting process was simulated. In the model, heat transfer of the whole system including the casting machine was considered. Temperature distribution and heat flux under normal operating conditions are presented and the heat-transfer characteristics were clarified. Conditions in the calculation, such as thermal resistance of mold section, and of carbon liner, inlet temperature of cooling water, its flow rate, and withdrawal speed were varied and the thermal effect on the forming process of steel was studied. Furthermore, a guide to optimize the size of the casting machine to improve the efficiency of manufacturing is proposed.

Saito, Akio; Okawa, Seiji (Tokyo Inst. of Tech. (Japan). Dept. of Mechanical Science and Engineering); Kaneko, Kentaro; Kaneko, Hideo

1994-10-01

412

Mold, flow, and economic considerations in high temperature precision casting  

E-print Network

Casting high temperature alloys that solidify through a noticeable two phase region, specifically platinum-ruthenium alloys, is a particularly challenging task due to their high melting temperature and this necessitates ...

Humbert, Matthew S

2013-01-01

413

Marry for What? Caste and Mate Selection in Modern India  

E-print Network

This paper analyzes how preferences for a noneconomic characteristic (e.g., caste) can affect equilibrium patterns of matching, and empirically evaluates this in the context of middle-class Indian arranged marriages. We ...

Banerjee, Abhijit

414

Development Program for Natural Aging Aluminum Casting Alloys  

SciTech Connect

A number of 7xx aluminum casting alloys are based on the ternary Al-Zn-Mg system. These alloys age naturally to high strength at room temperature. A high temperature solution and aging treatment is not required. Consequently, these alloys have the potential to deliver properties nearly equivalent to conventional A356-T6 (Al-Si-Mg) castings, with a significant cost saving. An energy savings is also possible. In spite of these advantages, the 7xx casting alloys are seldom used, primarily because of their reputation for poor castibility. This paper describes the results obtained in a DOE-funded research study of these alloys, which is part of the DOE-OIT ''Cast Metals Industries of the Future'' Program. Suggestions for possible commercial use are also given.

Dr. Geoffrey K. Sigworth

2004-05-14

415

Web Cast on Arsenic Demonstration Program: Lessons Learned  

EPA Science Inventory

Web cast presentation covered 10 Lessons Learned items selected from the Arsenic Demonstration Program with supporting information. The major items discussed include system design and performance items and the cost of the technologies....

416

42. Casting floor, "B" furnace, pour in progress; mudgun is ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

42. Casting floor, "B" furnace, pour in progress; mudgun is to right of furnace; operator takes temperature of iron in trough during pout. Looking south - Rouge Steel Company, 3001 Miller Road, Dearborn, Wayne County, MI

417

29 CFR 452.131 - Casting of ballots; delegate elections.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR LABOR-MANAGEMENT STANDARDS GENERAL STATEMENT CONCERNING THE ELECTION PROVISIONS OF THE LABOR-MANAGEMENT REPORTING AND DISCLOSURE ACT OF 1959 Election Procedures; Rights of Members § 452.131 Casting of ballots;...

2010-07-01

418

Kin selection, genomics and caste-antagonistic pleiotropy.  

PubMed

Kin selection is a fundamentally important process that affects the evolution of social behaviours. The genomics revolution now provides the opportunity to test kin selection theory using genomic data. In this commentary, we discuss previous studies that explored the link between kin selection and patterns of variation within the genome. We then present a new theory aimed at understanding the evolution of genes involved in the development of social insects. Specifically, we investigate caste-antagonistic pleiotropy, which occurs when the phenotypes of distinct castes are optimized by different genotypes at a single locus. We find that caste-antagonistic pleiotropy leads to narrow regions where polymorphism can be maintained. Furthermore, multiple mating by queens reduces the region in which worker-favoured alleles fix, which suggests that multiple mating impedes worker caste evolution. We conclude by discussing ways to test these and other facets of kin selection using newly emerging genomic data. PMID:24132087

Hall, David W; Yi, Soojin V; Goodisman, Michael A D

2013-01-01

419

Search for low Energy solar Axions with CAST  

E-print Network

We have started the development of a detector system, sensitive to single photons in the eV energy range, to be suitably coupled to one of the CAST magnet ports. This system should open to CAST a window on possible detection of low energy Axion Like Particles emitted by the sun. Preliminary tests have involved a cooled photomultiplier tube coupled to the CAST magnet via a Galileian telescope and a switched 40 m long optical fiber. This system has reached the limit background level of the detector alone in ideal conditions, and two solar tracking runs have been performed with it at CAST. Such a measurement has never been done before with an axion helioscope. We will present results from these runs and briefly discuss future detector developments.

Giovanni Cantatore; for the CAST Collaboration; :; E. Arik; S. Aune; D. Autiero; K. Barth; A. Belov; B. Beltrán; S. Borghi; F. S. Boydag; H. Bräuninger; G. Cantatore; J. M. Carmona; S. Cebrián; S. A. Cetin; J. I. Collar; T. Dafni; M. Davenport; L. Di Lella; O. B. Dogan; C. Eleftheriadis; N. Elias; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; J. Franz; J. Galán; E. Gazis; T. Geralis; I. Giomataris; S. Gninenko; H. Gómez; M. Hasinoff; F. H. Heinsius; I. Hikmet; D. H. H. Hoffmann; I. G. Irastorza; J. Jacoby; K. Jakov?i?; D. Kang; T. Karageorgopoulou; M. Karuza; K. Königsmann; R. Kotthaus; M. Kr?mar; K. Kousouris; M. Kuster; B. Laki?; C. Lasseur; A. Liolios; A. Ljubi?i?; V. Lozza; G. Lutz; G. Luzón; D. Miller; A. Morales; {deceased}; J. Morales; T. Niinikoski; A. Nordt; A. Ortiz; T. Papaevangelou; M. Pivovaroff; A. Placci; G. Raiteri; G. Raffelt; H. Riege; A. Rodríguez; J. Ruz; I. Savvidis; Y. Semertzidis; P. Serpico; S. K. Solanki; R. Soufli; L. Stewart; M. Tsagri; K. van Bibber; J. Villar; J. Vogel; L. Walckiers; K. Zioutas

2008-09-29

420

Fast Docking on Graphics Processing Units via Ray-Casting  

E-print Network

Docking Approach using Ray Casting (DARC) is structure-based computational method for carrying out virtual screening by docking small-molecules into protein surface pockets. In a complementary study we find that DARC can be used to identify known...

Khar, Karen R.; Goldschmidt, Lukasz; Karanicolas, John

2013-08-16

421

An Energy Savings Model for the Heat Treatment of Castings  

SciTech Connect

An integrated system of software, databases, and design rules have been developed, verified, and to be marketed to enable quantitative prediction and optimization of the heat treatment of aluminum castings to increase quality, increase productivity, reduce heat treatment cycle times and reduce energy consumption. The software predicts the thermal cycle in critical locations of individual components in a furnace, the evolution of microstructure, and the attainment of properties in heat treatable aluminum alloy castings. The model takes into account the prior casting process and the specific composition of the component. The heat treatment simulation modules can be used in conjunction with software packages for simulation of the casting process. The system is built upon a quantitative understanding of the kinetics of microstructure evolution in complex multicomponent alloys, on a quantitative understanding of the interdependence of microstructure and properties, on validated kinetic and thermodynamic databases, and validated quantitative models.

Y. Rong; R. Sisson; J. Morral; H. Brody

2006-12-31

422

Advanced lost foam casting technology. 1995 summary report  

SciTech Connect

Previous research made significant advances in understanding the Lost Foam Casting (LFC) Process and clearly identified areas where additional research was needed to improve the process and make it more functional in an industrial environment. The current project focused on five areas listed as follows: Task 1: Precision Pattern Production; Task 2: Pattern Coating Consistency; Task 3: Sand Fill and Compaction Effects; Task 4: Pattern Gating; and Task 5: Mechanical Properties of Castings. This report summarizes the work done under the current contract in all five areas. Twenty-eight (28) companies jointly participate in the project. These companies represent a variety of disciplines, including pattern designers, pattern producers, coating manufacturers, plant design companies, compaction equipment manufacturers, casting producers, and casting buyers. This report summarizes the work done in the past two years and the conclusions drawn from the work.

Bates, C.E.; Littleton, H.E.; Askeland, D.; Griffin, J.; Miller, B.A.; Sheldon, D.S.

1996-05-01

423

VIEW OF DOUBLE ROOF CAST HOUSE OF BLAST FURNACE NO. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF DOUBLE ROOF CAST HOUSE OF BLAST FURNACE NO. 3. COKE PLANT & MONESSEN BUSINESS DISTRICT IN BACKGROUND. VIEW FACING EAST. - Pittsburgh Steel Company, Monessen Works, Donner Avenue, Monessen, Westmoreland County, PA

424

INTERIOR VIEW LOOKING WEST, CAST HOUSE OF BLAST FURNACE NO. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

INTERIOR VIEW LOOKING WEST, CAST HOUSE OF BLAST FURNACE NO. 1 AND BLAST FURNACE NO. 2. - Pittsburgh Steel Company, Monessen Works, Blast Furnace No. 1 & No. 2, Donner Avenue, Monessen, Westmoreland County, PA

425

Nuclear-waste encapsulation by metal-matrix casting  

SciTech Connect

Several encapsulation casting processes are described that were developed or used at the Pacific Northwest Laboratory to embed simulated high-level wastes of two different forms (glass marbles and ceramic pellets) in metal matrices. Preliminary evaluations of these casting processes and the products are presented. Demonstrations have shown that 5- to 10-mm-dia glass marbles can be encapsulated on an engineering scale with lead or lead alloys by gravity or vacuum processes. Marbles approx. 12 mm in dia were successfully encapsulated in a lead alloy on a production scale. Also, 4- to 9-mm-dia ceramic pellets in containers of various sizes were completely penetrated and the individual pellets encased with aluminum-12 wt % silicon alloy by vacuum processes. Indications are that of the casting processes tested, aluminum 12 wt % silicon alloy vacuum-cast around ceramic pellets had the highest degree of infiltration or coverage of pellet surfaces.

Nelson, R.G.; Nesbitt, J.F.; Slate, S.C.

1981-05-01

426

Casting Stainless-Steel Models Around Pressure Tubes  

NASA Technical Reports Server (NTRS)

Survivability of thin-wall stainless-steel tubing increased to nearly 100 percent. Improves state of art in pressure-model castings and reduces cost associated with machining complete model from stainless-steel blank.

Vasquez, Peter; Micol, John R.

1992-01-01

427

Measurement and simulation of deformation and stresses in steel casting  

NASA Astrophysics Data System (ADS)

Experiments are conducted to measure displacements and forces during casting of a steel bar in a sand mold. In some experiments the bar is allowed to contract freely, while in others the bar is manually strained using embedded rods connected to a frame. Solidification and cooling of the experimental castings are simulated using a commercial code, and good agreement between measured and predicted temperatures is obtained. The deformations and stresses in the experiments are simulated using an elasto-viscoplastic finite-element model. The high temperature mechanical properties are estimated from data available in the literature. The mush is modeled using porous metal plasticity theory, where the coherency and coalescence solid fraction are taken into account. Good agreement is obtained between measured and predicted displacements and forces. The results shed considerable light on the modeling of stresses in steel casting and help in developing more accurate models for predicting hot tears and casting distortions.

Galles, D.; Monroe, C. A.; Beckermann, C.

2012-07-01

428

Constructivist Learning of Anatomy: Gaining Knowledge by Creating Anatomical Casts  

NSDL National Science Digital Library

This article describes a method to promote inquiry based learning in the anatomy curriculum. The article describes a method requiring students to build casts of the bronchial tree and coronary arteries while faculty asked leading questions related to the material.

Heidi L. Lujan (Wayne State Univ Sch Med Dept of Physiology); Stephen E DiCarlo (Northeastern Ohio University College of Medicine Department of Physiology)

2011-03-01

429

Predicting Pattern Tooling and Casting Dimensions for Investment Casting, Phase II  

SciTech Connect

The investment casting process allows the production of complex-shape parts and close dimensional tolerances. One of the most important phases in the investment casting process is the design of the pattern die. Pattern dies are used to create wax patterns by injecting wax into dies. The first part of the project involved preparation of reports on the state of the art at that time for all the areas under consideration (die-wax, wax-shell, and shell-alloy). The primary R&D focus during Phase I was on the wax material since the least was known about it. The main R&D accomplishments during this phase were determination of procedures for obtaining the thermal conductivity and viscoelastic properties of an unfilled wax and validating those procedures. Phase II focused on die-wax and shell-alloy systems. A wax material model was developed based on results obtained during the previous R&D phase, and a die-wax model was successfully incorporated into and used in commercial computer programs. Current computer simulation programs have complementary features. A viscoelastic module was available in ABAQUS but unavailable in ProCAST, while the mold-filling module was available in ProCAST but unavailable in ABAQUS. Thus, the numerical simulation results were only in good qualitative agreement with experimental results, the predicted shrinkage factors being approximately 2.5 times larger than those measured. Significant progress was made, and results showed that the testing and modeling of wax material had great potential for industrial applications. Additional R&D focus was placed on one shell-alloy system. The fused-silica shell mold and A356 aluminum alloy were considered. The experimental part of the program was conducted at ORNL and commercial foundries, where wax patterns were injected, molds were invested, and alloys were poured. It was very important to obtain accurate temperature data from actual castings, and significant effort was made to obtain temperature profiles in the shell mold. A model for thermal radiation within the shell mold was developed, and the thermal model was successfully validated using ProCAST. Since the fused silica shells had the lowest thermal expansion properties in the industry, the dewaxing phase, including the coupling between wax-shell systems, was neglected. The prefiring of the empty shell mold was considered in the model, and the shell mold was limited to a pure elastic material. The alloy dimensions were obtained from numerical simulations only with coupled shell-alloy systems. The alloy dimensions were in excellent quantitative agreement with experimental data, validating the deformation module. For actual parts, however, the creep properties of the shell molds must also be obtained, modeled, and validated.

Nick Cannell (EMTEC); Adrian S. Sabau (ORNL)

2005-09-30

430

Method of casting articles of a bulk-solidifying amorphous alloy  

DOEpatents

A casting charge of a bulk-solidifying amorphous alloy is cast into a mold from a temperature greater than its crystallized melting temperature, and permitted to solidify to form an article. The oxygen content of the casting charge is limited to an operable level, as excessively high oxygen contents produce premature crystallization during the casting operation. During melting, the casting charge is preferably heated to a temperature above a threshold temperature to eliminate heterogeneous crystallization nucleation sites within the casting charge. The casting charge may be cast from above the threshold temperature, or it may be cooled to the casting temperature of more than the crystallized melting point but not more than the threshold temperature, optionally held at this temperature for a period of time, and thereafter cast. 8 figs.

Lin, X.; Johnson, W.L.; Peker, A.

1998-08-25

431

Method of casting articles of a bulk-solidifying amorphous alloy  

DOEpatents

A casting charge of a bulk-solidifying amorphous alloy is cast into a mold from a temperature greater than its crystallized melting temperature, and permitted to solidify to form an article. The oxygen content of the casting charge is limited to an operable level, as excessively high oxygen contents produce premature crystallization during the casting operation. During melting, the casting charge is preferably heated to a temperature above a threshold temperature to eliminate heterogeneous crystallization nucleation sites within the casting charge. The casting charge may be cast from above the threshold temperature, or it may be cooled to the casting temperature of more than the crystallized melting point but not more than the threshold temperature, optionally held at this temperature for a period of time, and thereafter cast.

Lin, Xianghong (Laguna Niguel, CA); Johnson, William L. (Pasadena, CA); Peker, Atakan (Aliso Viejo, CA)

1998-01-01

432

Fabrication and characterization of cast magnesium matrix composites by vacuum stir casting process  

NASA Astrophysics Data System (ADS)

A vacuum stir casting process is developed to produce SiCp reinforced cast magnesium matrix composites. This process can eliminate the entrapment of external gas onto melt and oxidation of magnesium during stirring synthesis. Two composites with Mg-Al9Zn and Mg-Zn5Zr alloys as matrices and 15 vol.% SiC particles as reinforcement are obtained. The microstructure and mechanical properties of the composites and the unreinforced alloys in as-cast and heat treatment conditions are analyzed and evaluated. In 15 vol.% SiCp reinforced Mg-Al9Zn alloy-based composite (Mg-Al9Zn/15SiCp), SiC particles distribute homogenously in the matrix and are well bonded with magnesium. In 15 vol.% SiCp reinforced Mg-Zn5Zr alloy-based composite (Mg-Zn5Zr/15SiCp), some agglomerations of SiC particles can be seen in the microstructure. In the same stirring process conditions, SiC reinforcement is more easily wetted by magnesium in the Mg-Al9Zn melt than in the Mg-Zn5Zr melt. The significant improvement in yield strength and elastic modulus for two composites has been achieved, especially for the Mg-Al9Zn/15SiCp composite in which yield strength and elastic modulus increase 112 and 33%, respectively, over the unreinforced alloy, and increase 24 and 21%, respectively, for the Mg-Zn5Zr/15SiCp composite. The strain-hardening behaviors of the two composites and their matrix alloys were analyzed based on the microstructure characteristics of the materials.

Gui, Manchang; Li, Peiyong; Han, Jianmin

2003-04-01

433

Corrosion resistant gray cast iron graphite flake alloys  

SciTech Connect

Corrosion resistant gray cast iron alloys useful in downhole oil well environments and the like. The alloys are substantially lower in cost and substantially higher in tensile strength than high nickel-copper cast irons commonly used downhole in submergible pumps. The alloys contain substantial amounts of aluminum in combination with nickel, chromium, manganese, molybdenum, carbon, silicon, and iron. Copper, tin, vanadium, and boron may also be included. Both hardenable and non-hardenable alloys are provided.

Betts, B. A.

1985-10-22

434

Formability of continuous cast 5052 alloy thin sheets  

Microsoft Academic Search

The formability of continuous cast 5052 alloy thin sheets from two different process schedules was examined. One was prepared\\u000a in the laboratory by cold-rolling from a continuous cast thick plate followed by annealing (lab-processed sheet), and the\\u000a other was produced by a new process involving hot-rolling followed immediately by in-line annealing (in-line annealed sheet).\\u000a Tensile test results indicate that all

Hanliang Zhu; A. K. Ghosh; K. Maruyama

2007-01-01

435

Computational modeling and control system of continuous casting process  

Microsoft Academic Search

A finite difference model was developed and applied to calculate the temperature distribution and solid shell thickness profile\\u000a of continuous cast in a steel plant and to control the process of continuous casting. In the developed model, the optimization\\u000a module of the water distribution of secondary cooling zone was established according to the metallurgical criterion for billet\\u000a and target temperature

Ying-chun Wang; Da-yong Li; Ying-hong Peng; Li-guang Zhu

2007-01-01

436

Formation of longitudinal, midface cracks in continuously-cast slabs  

Microsoft Academic Search

Based on a series of related investigations, a mechanism for the formation of longitudinal, midface cracks in strand-cast\\u000a slabs has been elucidated. Metallographic studies, X-ray analyses, and high-temperature tensile testing of as-cast slab samples,\\u000a together with computer predictions of heat flow, have been combined to show that the cracks open first close to the solidification\\u000a front where the ductility is

J. K. Brimacombe; F. Weinberg; E. B. Hawbolt

1979-01-01

437

An application of advanced control to steel casting  

Microsoft Academic Search

Accurate control of the ferro-static head in continuous casting is believed to be a key factor in improving the quality of the cast product. This paper describes an application of advanced control, that resulted in a complete re-commissioning of the investigated mould level control system. Careful physical modelling identified smooth as well as non-smooth nonlinearities in the process. The paper

S. F. Graebe; G. C. Goodwin; M. R. West; P. Stepien

1994-01-01

438

Formation of longitudinal, midface cracks in continuously-cast slabs  

Microsoft Academic Search

Based on a series of related investigations, a mechanism for the formation of longitudinal, midface cracks in strand-cast slabs has been elucidated. Metallographic studies, X-ray analyses, and high-temperature tensile testing of as-cast slab samples, together with computer predictions of heat flow, have been combined to show that the cracks open first close to the solidification front where the ductility is

J. K. Brimacombe; F. Weinberg; E. B. Hawbolt

1979-01-01

439

Cast Metal Coalition Research and Development Closeout Report  

SciTech Connect

The Cast Metal Coalition, composed of more than 22 research providers and universities and 149 industrial partners, has completed a four-year research and development partnership with the Department of Energy. This report provides brief summaries of the 29 projects performed by the Coalition. These projects generated valuable information in such aspects of the metals industry as process prediction technologies, quality control, improved alloys, product machinability, and casting process improvements.

Allen, D.

2000-08-01

440

Methods for manufacturing monocrystalline or near-monocrystalline cast materials  

DOEpatents

Methods are provided for casting one or more of a semiconductor, an oxide, and an intermetallic material. With such methods, a cast body of a monocrystalline form of the one or more of a semiconductor, an oxide, and an intermetallic material may be formed that is free of, or substantially free of, radially-distributed impurities and defects and having at least two dimensions that are each at least about 35 cm.

Stoddard, Nathan G

2014-04-29

441

Gel-casting of ceramic components for wireless communications  

Microsoft Academic Search

Gel-casting is a novel ceramic forming process for fabricating products of complex-shaped ceramics. In this contribution, the gel-casting process is applied to manufacture green body of ceramic components for microwave resonators, oscillators and antennas. Calcined powders, dispersant and organic monomers are mixed together by ball-milling to acquire high solid loading slurry with low viscosity. After addition of initiator and catalyst,

Z. X. Xiong; C. Fang; Y. X. Wang; Z. G. Su

2005-01-01

442

Procedure for flaw detection in cast stainless steel  

DOEpatents

A method of ultrasonic flaw detection in cast stainless steel components incorporating the steps of determining the nature of the microstructure of the cast stainless steel at the site of the flaw detection measurements by ultrasonic elements independent of the component thickness at the site; choosing from a plurality of flaw detection techniques, one such technique appropriate to the nature of the microstructure as determined and detecting flaws by use of the chosen technique.

Kupperman, David S. (Oak Park, IL)

1988-01-01

443

Aging of maraging steel welds during aluminium alloy die casting  

Microsoft Academic Search

The aim of this study is to evaluate precipitation annealing of 18% Ni maraging steel repair welds during aluminium die casting and to predict the prolonged in-service tool life. The emphasis of this study is the influence of post-weld precipitation annealing heat treatment and aluminium die casting thermal cycling on metallurgical and mechanical properties. A series of specimens of 1.2344

D. Klob?ar; J. Tušek; B. Taljat; L. Kosec; M. Pleterski

2008-01-01

444

Mechanical properties and microstructure of centrifugally cast alloy 718  

Microsoft Academic Search

The relationship between the microstructure and mechanical properties of alloy 718 was investigated for two discs centrifugally\\u000a cast at 50 and 200 rpm and given a duplex age heat treatment. The results of mechanical property tests at temperatures from\\u000a 426 to 649 °C showed that the tensile yield and ultimate strength levels of both castings were similar. However, the creep-rupture

D. J. Michel; H. H. Smith

1985-01-01

445

Real-time simulation of heat transfer in continuous casting  

Microsoft Academic Search

A real-time heat-transfer model for continuous slab casting is presented. The model calculates the strand temperatures and\\u000a the solid shell thickness profile along the machine as a function of the actual casting variables, strand geometry, and steel\\u000a grade. The special requirements con-cerning the real-time use of the model and, in general, the accuracy of the model are\\u000a also studied and

Seppo Louhenkilpi; Erkki Laitinen; Risto Nieminen

1993-01-01

446

A moving cast shadow diminishes the Pulfrich phenomenon.  

PubMed

It is demonstrated that the presence of a moving cast shadow diminishes the Pulfrich phenomenon. This complements previous work by Kersten, Knill, Mamassian, and Bülthoff [1996 Nature (London) 379 31] indicating that visible cast shadows can override monocularly based cues to the perceived trajectory of a moving object. The present finding with the Pulfrich phenomenon indicates the effectiveness of shadows for overriding binocularly based cues to the perceived trajectory of a moving object. PMID:10070557

Price, T J; O'Toole, A J; Dambach, K C

1998-01-01

447

Heat Treatment Procedure Qualification for Steel Castings  

SciTech Connect

Heat treatment practices used by steel foundries have been carefully studied as part of comprehensive heat treatment procedure qualification development trials. These studies highlight the relationships between critical heat treatment process control parameters and heat treatment success. Foundry heat treatment trials to develop heat treatment procedure qualifications have shed light on the relationship between heat treatment theory and current practices. Furnace load time-temperature profiles in steel foundries exhibit significant differences depending on heat treatment equipment, furnace loading practice, and furnace maintenance. Time-temperature profiles of furnace control thermocouples can be very different from the time-temperature profiles observed at the center of casting loads in the furnace. Typical austenitization temperatures and holding times used by steel foundries far exceed what is required for transformation to austenite. Quenching and hardenability concepts were also investigated. Heat treatment procedure qualification (HTPQ) schema to demonstrate heat treatment success and to pre-qualify other alloys and section sizes requiring lesser hardenability have been developed. Tempering success is dependent on both tempering time and temperature. As such, furnace temperature uniformity and control of furnace loading during tempering is critical to obtain the desired mechanical properties. The ramp-up time in the furnace prior to the establishment of steady state heat treatment conditions contributes to the extent of heat treatment performed. This influence of ramp-up to temperature during tempering has been quantified.

Mariol Charles; Nicholas Deskevich; Vipin Varkey; Robert Voigt; Angela Wollenburg

2004-04-29

448

Microstructural changes in As— Cast M2  

NASA Astrophysics Data System (ADS)

High speed steels have a complex carbide pattern in the as-cast state which has to be modified to achieve the desired properties of adequate toughness, hot hardness, and wear resistance. The effects of hot forging and postdeformation annealing on carbide distribution and morphology in M2 grade high speed steel were studied, and it was shown that hot forging accelerates the spheroidization rate of M6C carbide with little effect on coarsening. The mechanism responsible for such acceleration is dominated by mechanical disintegration of M6C carbide plates, while diffusion-controlled spheroidization was not significant. For MC carbide particles, coarsening was the dominant mechanism, but it was not possible to ascertain whether diffusion had been unaffected by deformation or even increased by a factor that could be as high as 10,000 times. Annealing after deformation accelerated spheroidization which was attributed to the damaging of carbide plates during forging rather than an increase in diffusion rate, since the matrix was almost substructure-free in the annealed condition, i.e., lack of short-circuiting paths for diffusion.

Ghomashchi, M. R.; Sellars, Cm.

1993-10-01

449

Cast-to-shape electrokinetic trapping medium  

DOEpatents

A three-dimensional microporous polymer network material, or monolith, cast-to-shape in a microchannel. The polymer monolith, produced by a phase separation process, is capable of trapping and retaining charged protein species from a mixture of charged and uncharged species under the influence of an applied electric field. The retained charged protein species are released from the porous polymer monolith by a pressure driven flow in the substantial absence of the electric field. The pressure driven flow is independent of direction and thus neither means to reverse fluid flow nor a multi-directional flow field is required, a single flow through the porous polymer monolith can be employed, in contrast to prior art systems. The monolithic polymer material produced by the invention can function as a chromatographic medium. Moreover, by virtue of its ability to retain charged protein species and quantitatively release the retained species the porous polymer monolith can serve as a means for concentrating charged protein species from, for example, a dilute solution.

Shepodd, Timothy J. (Livermore, CA); Franklin, Elizabeth (Rolla, MO); Prickett, Zane T. (Golden, CO); Artau, Alexander (Pleasanton, CA)

2006-05-30

450

Restoring Functional Areas of Continuously Casted Cylinders  

NASA Astrophysics Data System (ADS)

the paper proposes the fourth restoration of a roller in continuous casting production lines which can enhance production efficiency and lowers costs. The roller was forged from the material 24CrMoV55 - DIN 17240. The roller has been restored three times and is chosen for further restoration. The roller was restored by submerged arc welding (SAW) where the first layer was made from UP-5-200-CZ wire and the covering layers made from UP-5-45-CZ wire. Quality of the weld deposits were evaluated by measuring the hardness, mixing the weld with basic material and by setting the basic mechanical properties in the critical under-weld deposit area. Structures of the weld deposits were evaluated by light microscopy and their chemical composition was determined by EDX analysis. Based on experiments it can be concluded that rollers can be restored for the fourth time, but the limiting factor is the extent of damage.

Brezinová, Janette; Balog, Peter; Vi?áš, Ján

2012-12-01

451

Pathobiology of cast nephropathy from human Bence Jones proteins.  

PubMed Central

Renal failure is a common accompaniment of multiple myeloma and is usually due to cast nephropathy, or "myeloma kidney." To understand this lesion, four human Bence Jones proteins (BJP) were purified from the urine of volunteers who had either no evidence of renal dysfunction (BJP1) or renal failure from cast nephropathy (BJP2, BJP3, BJP4). When infused directly into the rat nephron in vivo, BJP2, BJP3, and BJP4 produced intraluminal obstruction by precipitating in the distal nephron; protein casts were never identified before the tip of the loop of Henle. Obstruction was related to the concentration of BJP in the perfusate. Addition of furosemide to the perfusate augmented obstruction in a concentration-dependent fashion. Pretreatment of rats with colchicine completely prevented obstruction and cast formation of perfused nephrons; beta-lumicolchicine did not prevent obstruction. Tamm-Horsfall glycoprotein purified from beta-lumicolchicine-treated and untreated rats coaggregated with BJP3 in vitro. Tamm-Horsfall glycoprotein from colchicine-treated rats did not contain sialic acid and did not aggregate with BJP3 in vitro. Thus, cast-forming human BJP coaggregated with Tamm-Horsfall glycoprotein and obstructed the rat distal nephron. Intranephronal obstruction was aggravated by decreasing extracellular fluid volume or adding furosemide. Finally, by decreasing secretion and altering the carbohydrate moiety of Tamm-Horsfall glycoprotein, colchicine prevented intraluminal cast formation and obstruction of the rat nephron. Images PMID:1737851

Sanders, P W; Booker, B B

1992-01-01

452

Surface hardening of two cast irons by friction stir processing  

NASA Astrophysics Data System (ADS)

The Friction Stir Processing (FSP) was applied to the surface hardening of cast irons. Flake graphite cast iron (FC300) and nodular graphite cast iron (FCD700) were used to investigate the validity of this method. The matrices of the FC300 and FC700 cast irons are pearlite. The rotary tool is a 25mm diameter cylindrical tool, and the travelling speed was varied between 50 and 150mm/min in order to control the heat input at the constant rotation speed of 900rpm. As a result, it has been clarified that a Vickers hardness of about 700HV is obtained for both cast irons. It is considered that a very fine martensite structure is formed because the FSP generates the heat very locally, and a very high cooling rate is constantly obtained. When a tool without an umbo (probe) is used, the domain in which graphite is crushed and striated is minimized. This leads to obtaining a much harder sample. The hardness change depends on the size of the martensite, which can be controlled by the process conditions, such as the tool traveling speed and the load. Based on these results, it was clarified that the FSP has many advantages for cast irons, such as a higher hardness and lower distortion. As a result, no post surface heat treatment and no post machining are required to obtain the required hardness, while these processes are generally required when using the traditional methods.

Fujii, Hidetoshi; Yamaguchi, Yasufumi; Kikuchi, Toshifumi; Kiguchi, Shoji; Nogi, Kiyoshi

2009-05-01

453

Mechanical properties and microstructure of centrifugally cast alloy 718  

NASA Astrophysics Data System (ADS)

The relationship between the microstructure and mechanical properties of alloy 718 was investigated for two discs centrifugally cast at 50 and 200 rpm and given a duplex age heat treatment. The results of mechanical property tests at temperatures from 426 to 649 °C showed that the tensile yield and ultimate strength levels of both castings were similar. However, the creep-rupture properties were considerably enhanced for the casting produced at 200 rpm. Comparison of the radial and transverse creep properties of each disc indicated that creep life was generally independent of orientation, but ductility was greatest for specimens oriented transverse to the radial direction of the casting. Fatigue crack propagation performance was not greatly influenced by orientation or mold speed parameters and was comparable to wrought alloy 718 when compared on the basis of stress intensity factor range. The centrifugal casting process was found to produce a homogeneous microstructure free of porosity but with the expected segregation of solute alloying elements to Laves and carbide phases. The effect of the as-cast microstructure on the mechanical behavior and the potential influence of hot isostatic pressing to improve the microstructure are discussed.

Michel, D. J.; Smith, H. H.

1985-07-01

454

Mechanical properties and microstructure of centrifugally cast alloy 718  

SciTech Connect

The relationship between the microstructure and mechanical properties of alloy 718 was investigate for two discs centrifugally cast at 50 and 200 rpm and given a duplex age heat treatment. The results of mechanical property tests at temperatures from 426 to 649/sup 0/C showed that the tensile, yield and ultimate strength levels of both castings were similar. However, the creep-rupture properties were considerably enhanced for the casting produced at 200 rpm. Comparison of the radial and transverse creep properties of each disc indicated that creep life was generally independent of orientation, but ductility was greatest for specimens oriented transverse to the radial direction of the casting. Fatigue crack propagation performance was not greatly influenced by orientation or mold speed parameters and is comparable to wrought alloy 718 when compared on the basis of stress intensity factor range. The centrifugal casting process was found to produce a homogeneous microstructure free of porosity but with the expected segregation of solute alloying elements to Laves and carbide phases. The effect of the as-cast microstructure on the mechanical behavior and the potential influence of hot isostatic pressing to improve the microstructure are discussed.

Michel, D.J.; Smith, H.H.

1985-07-01

455

Materials processing threshold report: 2. Use of low gravity for cast iron process development  

NASA Technical Reports Server (NTRS)

Potential applications of a low gravity environment of interest to the commercial producers of cast iron were assessed to determine whether low gravity conditions offer potential opportunities to producers for improving cast iron properties and expanding the use of cast irons. The assessment is limited to the gray and nodular types of iron, however, the findings are applicable to all cast irons. The potential advantages accrued through low gravity experiments with cast irons are described.

Frankhouser, W. L.

1980-01-01

456

ToxCast: Developing Predictive Signatures of Chemically Induced Toxicity (Developing Predictive Bioactivity Signatures from ToxCasts HTS Data)  

EPA Science Inventory

ToxCast, the United States Environmental Protection Agency?s chemical prioritization research program, is developing methods for utilizing computational chemistry, bioactivity profiling and toxicogenomic data to predict potential for toxicity and prioritize limited testing resour...

457

Casting evaluation of U-Zr alloy system fuel slug for SFR prepared by injection casting method  

SciTech Connect

Metal fuel slugs of U-Pu-Zr alloys for Sodium-cooled Fast Reactor (SFR) have conventionally been fabricated by a vacuum injection casting method. Recently, management of minor actinides (MA) became an important issue because direct disposal of the long-lived MA can be a long-term burden for a tentative repository up to several hundreds of thousand years. In order to recycle transuranic elements (TRU) retained in spent nuclear fuel, remote fabrication capability in a shielded hot cell should be prepared. Moreover, generation of long-lived radioactive wastes and loss of volatile species should be minimized during the recycled fuel fabrication step. In order to prevent the evaporation of volatile elements such as Am, alternative fabrication methods of metal fuel slugs have been studied applying gravity casting, and improved injection casting in KAERI, including melting under inert atmosphere. And then, metal fuel slugs were examined with casting soundness, density, chemical analysis, particle size distribution and microstructural characteristics. Based on these results there is a high level of confidence that Am losses will also be effectively controlled by application of a modest amount of overpressure. A surrogate fuel slug was generally soundly cast by improved injection casting method, melted fuel material under inert atmosphere.

Song, Hoon; Kim, Jong-Hwan; Kim, Ki-Hwan; Lee, Chan-Bock [Korea Atomic Energy Research Institute, Daedeok-daro 989-111, Yuseong-gu, Daejeon (Korea, Republic of)

2013-07-01

458

Soldier caste influences on candidate primer pheromone levels and juvenile hormone-dependent caste differentiation in workers of the termite Reticulitermes flavipes  

Microsoft Academic Search

Caste systems and the division of labor they make possible are common underlying features of all social insects. Multiple extrinsic factors have been shown to impact caste composition in social insect colonies. Primer pheromones are one type of extrinsic caste-regulatory factor; they are chemical signaling molecules produced by certain colony members to impact developmental physiology of recipient nestmates. However, only

Matthew R. Tarver; Eric A. Schmelz; Michael E. Scharf

2011-01-01

459

Yield improvement and defect reduction in steel casting  

SciTech Connect

This research project investigated yield improvement and defect reduction techniques in steel casting. Research and technology development was performed in the following three specific areas: (1) Feeding rules for high alloy steel castings; (2) Unconventional yield improvement and defect reduction techniques--(a) Riser pressurization; and (b) Filling with a tilting mold; and (3) Modeling of reoxidation inclusions during filling of steel castings. During the preparation of the proposal for this project, these areas were identified by the High Alloy Committee and Carbon and Low Alloy Committee of the Steel Founders' Society of America (SFSA) as having the highest research priority to the steel foundry industry. The research in each of the areas involved a combination of foundry experiments, modeling and simulation. Numerous SFSA member steel foundries participated in the project through casting trials and meetings. The technology resulting from this project will result in decreased scrap and rework, casting yield improvement, and higher quality steel castings produced with less iteration. This will result in considerable business benefits to steel foundries, primarily due to reduced energy and labor costs, increased capacity and productivity, reduced lead-time, and wider use and application of steel castings. As estimated using energy data provided by the DOE, the technology produced as a result of this project will result in an energy savings of 2.6 x 10{sup 12} BTU/year. This excludes the savings that were anticipated from the mold tilting research. In addition to the energy savings, and corresponding financial savings this implies, there are substantial environmental benefits as well. The results from each of the research areas listed above are summarized.

Kent Carlson

2004-03-16

460

Method of reducing the green density of a slip cast article  

DOEpatents

The method disclosed in this specification is one of reducing the green density of an article cast in a slip casting operation. The article is cast from a casting slip containing silicon metal particles, yttrium containing particles, and a small amount of a fluoride salt which is effective to suppress flocculation of the silicon metal particles by y.sup.+3 ions derived from the yttrium containing particles. The method is characterized by the following step. A small amount of compound which produces a cation which will partly flocculate the particles of silicon metal is added to the casting slip. The small amount of this compound is added so that when the casting slip is slip cast into a casting mold, the partly flocculated particles of silicon will interrupt an otherwise orderly packing of the particles of silicon and particles of yttrium. In this manner, the green density of the slip cast article is reduced and the article may be more easily nitrided.

Mangels, John A. (Flat Rock, MI); Dickie, Ray A. (Birmingham, MI)

1985-01-01

461

Simulation and Experiment on Direct Continuous Casting Process of Lead Frame Copper Alloy  

SciTech Connect

Direct Continuous Casting (D.C.C) is an important method in casting lead frame copper alloy. In this paper, numerical simulation is adopted to investigate the casting process in order to optimize the D.C.C technical parameters, such as the casting temperature, casting speed and cooling intensity. According to the numerical results, the reasonable parameters are that the casting temperature is between 1413 Kapprox1413 K, the casting speed is between 8 m/happrox10 m/h and the speed of cooling water is between 4.2 m/sapprox4.6 m/s. And the depth of liquid-solid boundary is measured in different casting temperature and casting speed by experiments. The results show the actual measurements have a little deviation with the numerical simulation. The results of numerical simulation provide the significant reference to the actual experiments.

Huang Guojie; Xie Shuisheng; Cheng Lei [State Key Laboratory for Fabrication and Process of Nonferrous Metals, Beijing General Research Institute for Non-ferrous Metals, 100088 (China)

2010-06-15

462

Feasibility of a Braided Composite for Orthopedic Bone Cast  

PubMed Central

A tubular braided composite bone cast for improving the efficiency and quality of bone fracture treatment is investigated. Finite element analysis was used to evaluate stress concentrations in fracture sites supported with plate and tubular casts. The stress in a plated bone is 768 % of that in a whole bone at the same location, while it is only 47 % in a bone with a tubular cast. Three unbroken synthetic humeri were mechanically tested using an in-vitro long bone testing procedure developed in-house to find their stiffness at 20° and 60° abduction; these were found to be 116.8 ± 1.5 N/mm and 20.63 ± 0.02 N/mm, respectively. A 2 cm gap osteotomy was cut through the diaphysis in each bone. The bones were casted with a Kevlar/Cold cure composite, with calculated braid angles and thicknesses that Closely matched bone propoerties. The stiffness tests were repeated, and the results were within 10 % of the unbroken bone. This novel method of bone casting is promising if other clinical challenges can be minimized. PMID:23459455

Evans, Katherine R; Carey, Jason P

2013-01-01

463

High strength cast aluminum alloy development  

NASA Astrophysics Data System (ADS)

The goal of this research was to understand how chemistry and processing affect the resulting microstructure and mechanical properties of high strength cast aluminum alloys. Two alloy systems were investigated including the Al-Cu-Ag and the Al-Zn-Mg-Cu systems. Processing variables included solidification under pressure (SUP) and heat treatment. This research determined the range in properties that can be achieved in BAC 100(TM) (Al-Cu micro-alloyed with Ag, Mn, Zr, and V) and generated sufficient property data for design purposes. Tensile, stress corrosion cracking, and fatigue testing were performed. CuAl2 and Al-Cu-Fe-Mn intermetallics were identified as the ductility limiting flaws. A solution treatment of 75 hours or longer was needed to dissolve most of the intermetallic CuAl 2. The Al-Cu-Fe-Mn intermetallic was unaffected by heat treatment. These results indicate that faster cooling rates, a reduction in copper concentration and a reduction in iron concentration might increase the ductility of the alloy by decreasing the size and amount of the intermetallics that form during solidification. Six experimental Al-Zn-Mg-Cu series alloys were produced. Zinc concentrations of 8 and 12wt% and Zn/Mg ratios of 1.5 to 5.5 were tested. Copper was held constant at 0.9%. Heat treating of the alloys was optimized for maximum hardness. Al-Zn-Mg-Cu samples were solution treated at 441°C (826°F) for 4 hours before ramping to 460°C (860°F) for 75 hours and then aged at 120°C (248°F) for 75 hours. X-ray diffraction showed that the age hardening precipitates in most of these alloys was the T phase (Mg32Zn 31.9Al17.1). Tensile testing of the alloys showed that the best mechanical properties were obtained in the lowest alloy condition. Chilled Al-8.2Zn-1.4Mg-0.9Cu solidified under pressure resulted in an alloy with a yield strength of 468MPa (68ksi), tensile strength of 525MPa (76ksi) and an elongation of 9%.

Druschitz, Edward A.

464

Estimation of Volume Deficit Characteristic of Cast Al-Si-Mg Alloy  

NASA Astrophysics Data System (ADS)

Volume deficit characteristic of US A356 cast aluminium alloy has been discussed in the present study. The reduction in specific volume leads to volume deficit in castings and it can be visualized as a casting defect. The information regarding the volume deficit and its distribution is essential in minimizing casting defects. The volume deficit can be classified as macro cavities, internal porosity, surface sinks and volumetric contraction. These defects are measured using mathematical formulae and the actual volume deficit of the given casting has been arrived by adding all the defects. Influence of bottom chill and casting shape on the volume deficit characteristics have been studied.

Santhi, S.; Sakri, S. B.; Rao, D. Hanumantha; Sundarrajan, S.

2013-04-01

465

Twin-belt continuous caster with containment and cooling of the exiting cast product for enabling high-speed casting of molten-center product  

DOEpatents

In continuously casting molten metal into cast product by a twin-belt machine, it is desirable to achieve dramatic increases in speed (linear feet per minute) at which cast product exits the machine, particularly in installations where steel cast product is intended to feed a downstream regular rolling mill (as distinct from a planetary mill) operating in tandem with the twin-belt caster. Such high-speed casting produces product with a relatively thin shell and molten interior, and the shell tends to bulge outwardly due to metallostatic head pressure of the molten center. A number of cooperative features enable high-speed, twin-belt casting: (1) Each casting belt is slidably supported adjacent to the caster exit pulley for bulge control and enhanced cooling of cast product. (2) Lateral skew steering of each belt provides an effective increase in moving mold length plus a continuity of heat transfer not obtained with prior art belt steering apparatus. (3) The exiting slab is contained and supported downstream from the casting machine to prevent bulging of the shell of the cast product, and (4) spray cooling is incorporated in the exit containment apparatus for secondary cooling of cast product.

Dykes, Charles D. (303 Shore Rd., Milton, VT); Daniel, Sabah S. (303 Shore Rd., Pittsburgh, PA); Wood, J. F. Barry (303 Shore Rd., Burlington, VT 05401)

1990-02-20

466

Double Oxide Film Defects in Cast Magnesium Alloy  

NASA Astrophysics Data System (ADS)

Castings were made in an unfluxed commercial purity Mg alloy in plate molds with both well-designed and poorly designed running system features. The poor running system design was associated with more entrainment of the surface oxide film during mold filling and produced a greater spread in ultimate tensile strength (UTS) and pct elongation values than the castings produced with the good running system design. This is also an effect found in Al alloys where it has also been associated with entrainment of the surface oxide film during mold filling. Scanning electron microscopy of the fracture surfaces of tensile test bars cut from the cast plates revealed oxide film defects comprised of folded over and symmetrical MgO films, similar in form and structure to the double oxide film defects found in Al alloys.

Griffiths, W. D.; Lai, N.-W.

2007-01-01

467

Castes, migration, immunogenetics and infectious diseases in south India.  

PubMed

It has been said that the grandest genetic experiment of nature has been conducted in south India in the name of the caste system. One can expect the frequency of an infectious disease to be equal to the product of the frequencies of various indicated loci/alleles, whether physiological, hormonal or immunological, in an endemic area. The sympatrically isolated caste and sub-caste populations of southern India, with differing origins, migration patterns and breeding habits, differ significantly in their HLA and other immune repertoire and are ideal models to study and test this hypothesis. The prevalence of a number of major infectious diseases, including TB and leprosy, are reviewed in different communities in the light of their genetic history. PMID:14960884

Pitchappan, R M

2002-01-01

468

Nuclear-waste encapsulation by metal-matrix casting  

NASA Astrophysics Data System (ADS)

Several encapsulation casting processes, developed to embed simulated high-level wastes of two different forms (glass marbles and ceramic pellets) in metal matrices, are described. Preliminary evaluations of these casting processes and the products are presented. Demonstrations hsow that 5- to 10-mm-dia glass marbles can be encapsulated on an engineering scale with lead or lead alloys by gravity or vacuum processes. Marbles approx. 12 mm in dia were successfully encapsulated in a lead alloy on a production scale. Also, 4- to 9-mm-dia ceramic pellets in containers of various sizes were completely penetrated and the individual pellets encased with aluminum-12 wt percent silicon alloy by vacuum 12 wt percent silicon alloy vacuum-cast around ceramic pellets had the highest degree of infiltration or coverage of pellet surfaces.

Nelson, R. G.; Nesbitt, J. F.; Slate, S. C.

1981-05-01

469

Fabrication of cast particle-reinforced metals via pressure infiltration  

NASA Technical Reports Server (NTRS)

A new casting process for fabrication of particle-reinforced metals is presented whereby a composite of particulate reinforcing phase in metal is first produced by pressure infiltration. This composite is then diluted in additional molten metal to obtain the desired reinforcement volume fraction and metal composition. This process produces a pore-free as-cast particulate metal-matrix composite. This process is demonstrated for fabrication of magnesium-matrix composites containing SiC reinforcements of average diameter 30, 10 and 3 microns. It is compared with the compocasting process, which was investigated as well for similar SiC particles in Mg-10 wt pct Al, and resulted in unacceptable levels of porosity in the as-cast composite.

Klier, E. M.; Mortensen, A.; Cornie, J. A.; Flemings, M. C.

1991-01-01

470

Heat treatment in high Cr white cast iron Nb alloy  

NASA Astrophysics Data System (ADS)

Wear resistance of high Cr white cast irons can be improved by means of heat treatment. This type of cast iron alloy may present a microstructure with retained austenite. The amount of retained austenite changes with the applied heat treatment, which will have an influence on wear properties. The purpose of this work was to study the influence of several parameters such as quenching and tempering temperatures and subzero treatment in the wear performance of the high Cr white cast iron Nb alloy. In this way, the performance was evaluated using pin-on-disc abrasion test. The worn surface was examined by scanning electron microscopy, and the main wear mechanisms were identified. The microstructural characterization was also performed with carbide identification. This Fe alloy has proven to be good for applications in mining and alcohol-sugar industries.

Farah, A. F.; Crnkovic, O. R.; Canale, L. C. F.

2001-02-01

471

Advanced Lost Foam Casting technology: 1997 summary report  

SciTech Connect

Previous research made significant advances in understanding the Lost Foam Casting (LFC) Process and clearly identified areas where additional research was needed to improve the process and make it more functional in an industrial environment. The current project focused on eight tasks listed as follows: Task 1--pyrolysis defects and sand distortion; Task 2--bronze casting technology; Task 3--steel casting technology; Task 4--sand filling and compaction; Task 5--coating technology; Task 6--precision pattern production; Task 7--computational modeling; and Task 8--project management and technology transfer. This report summarizes the work done under the current contract in all eight tasks in the period of October 1, 1995 through December 31, 1997.

NONE

1997-12-31

472

Wear of Cast Chromium Steels With TiC Reinforcement  

SciTech Connect

Wear resistance of a series of new titanium carbide reinforced cast chromium steels was investigated under various wear conditions. The steels which were melted in a vacuum induction furnace contained 12 Cr, 3-5 Ti, 1-2 C in weight percent. Microstructure of these materials was characterized using scanning electron microscopy, light optical microscopy, and X-ray diffraction. Microstructure of steels consisted of TiC phase dispersed in a martensitic matrix. High-stress and low-stress abrasion tests, and an erosion test, were utilized to understand the wear behavior of these materials under different environments. The steels were tested in as-cast and heat treated conditions. Wear rates of the cast Cr/TiC steels were compared to those of an AISI type 440C steel and P/M composites reinforced with TiC.

Dogan,O.N.; Hawk, J.A.; Tylczak, J.H.

2001-10-01

473

A Study on the Wear Behavior of Cast Boron Steel  

NASA Astrophysics Data System (ADS)

In this study, a wear-resistant Cast Boron Steel (CBS) of nominal composition 0.25% C, 1.18% B, 1.27% Cr, 0.85% Mn, and 0.69% Si was oil-quenched at different temperatures. The effect of quenching temperature on the microstructure and wear resistance of CBS was investigated. Moreover, the wear resistance between CBS and high chromium cast iron was compared. The results show that a martensite matrix can be obtained by quenching from 900 to 1050 °C, and the wear resistance of quenched CBS is excellent, which reaches the level of high chromium cast iron. The reason behind the fact that CBS has excellent wear resistance is discussed.

Fu, Han-Guang; Xing, Jian-Dong; Lei, Yong-Ping; Huang, Li-Ming

2011-12-01

474

Swing Casting Boost for Confined Domain Wall Breathing  

NASA Astrophysics Data System (ADS)

A steady breathing mode excitation of the confined domain wall under dc is a candidate signal source in future telecommunication devices. The breathing mode exhibits a non-linear response to dc with a threshold. Before driving the breathing mode, if we resonantly swing the domain wall by ac, the domain wall is expected to be cast to a breathing mode even below the threshold dc. To examine the effect of “swing casting”, we investigate the resonant mode under ac. We show that overdamped, underdamped, chaotic, and periodic running modes emerge depending on the applied ac amplitude. Furthermore, we demonstrate that swing casting achieves the steady breathing mode excitation down to one quarter of the threshold dc.

Matsushita, Katsuyoshi; Sasaki, Munetaka; Chawanya, Tsuyoshi

2014-01-01

475

Development of a CFD code for casting simulation  

NASA Technical Reports Server (NTRS)

The task of developing a computational fluid dynamics (CFD) code to accurately model the mold filling phase of a casting operation was accomplished in a systematic manner. First the state-of-the-art was determined through a literature search, a code search, and participation with casting industry personnel involved in consortium startups. From this material and inputs from industry personnel, an evaluation of the currently available codes was made. It was determined that a few of the codes already contained sophisticated CFD algorithms and further validation of one of these codes could preclude the development of a new CFD code for this purpose. With industry concurrence, ProCAST was chosen for further evaluation. Two benchmark cases were used to evaluate the code's performance using a Silicon Graphics Personal Iris system. The results of these limited evaluations (because of machine and time constraints) are presented along with discussions of possible improvements and recommendations for further evaluation.

Murph, Jesse E.

1992-01-01

476

[Effects of mold preheating temperatures and the time of melt casting on the structure of cast denture frameworks].  

PubMed

At casting temperatures of 1330 degrees to 1530 degrees C and preheating temperatures of 900 degrees to 1100 degrees C, 28 cast denture frameworks were manufactured using the cobalt chromium alloy Biosil f (Degussa). The inner defects were detected by X-ray defectoscopy and the grain numbers of clasp, connector and basis elements determined by metallography. The best results for compact castings were observed at a temperature range of 1410 degrees to 1480 degrees C. Casting previous to the melting of the last alloy cube results in a structure of clasps and connectors with 100-200 grains/mm2 and a high amount of defects; exceeding the liquidus temperature of 1380 degrees C produces grain numbers of 20-30/mm2, while a casting temperature of 1530 degrees C results in 3-5/mm2. Overheating of the melt, also in connection with low preheating temperatures, is probably a cause for the premature loss of clasp retention and fracture of many denture frameworks. PMID:2700705

Biffar, R; Balz, U

1989-11-01

477

Computation of Thermal Behavior During Solidification of Aluminium Base Alloys Castings Cast in CO2-Sand Mold  

NASA Astrophysics Data System (ADS)

Solidification of molten metals during various casting methods poses many practical problems associated with phase transformation and heat transfer processes. Evaluation of solidification time is one of the very important parameters used for assessing the properties of the material. In the present study, experimental investigation is carried out to measure the solidification time in a cylindrical hollow casting cast in CO2-Sand molds and the same has been compared with the results obtained through computed by using an implicit alternating direction (IAD) method, including the treatment of interfacial nodes between metal and mold, and boundary nodes at the mold surface. Aluminum-4.5% copper alloy has been used. Computed cooling curves at various locations and temperature distributions in casting-metal-mold are presented. The results shows that the solidification time obtained by experimental study compares well with the one predicted by the analysis made through IAD modeling. A successful comparison with reported experimental results shows that the technique is appropriate for simulation of solidification process of aluminium castings.

Kulkarni, S. N.; Radhakrishna, K.

478

Modeling the thin-slab continuous-casting mold  

SciTech Connect

A three-dimensional mathematical model has been developed to compute the thermomechanical state in the mold of thin-slab continuous casters. The thin-slab mold differs from those used in conventional slab casters in that the upper portion of the broad side walls defines a funnel-shaped chamber which allows the nozzle to be submerged into the liquid metal. The chamber converges with distance down the mold, reducing to the rectangular cross section of the finished casting near the mold exit. The new mold, along with casting speeds up to 6 m/min, allows slabs to be cast 50--60 mm thick, compared with 150 to 350 mm in conventional continuous slab casting. However, the mold shape and high casting speed lead to higher mold temperatures and shorter mold life than are found in conventional slab casters. In this article, the author develop mathematical models of the process to determine the role of various process parameters in determining the mold life. Finite-element analysis is used to determine the temperatures in the mold and cast slab, and these data are then used in an elastic-viscoplastic analysis to investigate the deformation of the mold wall in service. Cyclic inelastic strains up to 1.75 pct are found in a region below the meniscus along the funnel edge. These large strains result from the combination of locally high temperatures coupled with geometric restraint of the mold. The deformation leads to short mold life because of thermal fatigue cracking of the mold. The computed locations and time to failure of the mold in fatigue agree very well with observations of the appearance of mold surface cracks in an operating caster. The models are also used to develop an improved mold design.

O'Connor, T.G. (Lawrence Livermore National Lab., CA (United States). Applied Superconductivity Group); Dantzig, J.A. (Univ. of Illinois, Urbana, IL (United States). Dept. of Mechanical and Industrial Engineering)

1994-06-01

479

Hickey -TT175, casts 220, line 222-229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date/Time (MMDDYYHHMM) Total Scans  

E-print Network

Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date,220 #12;Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date #12;Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date

Hickey, Barbara

480

75 FR 54595 - Certain Iron Construction Castings From Brazil, Canada, and the People's Republic of China: Final...  

Federal Register 2010, 2011, 2012, 2013

...A-122-503, A-570-502] Certain Iron Construction Castings From Brazil, Canada...the antidumping duty orders on certain iron construction castings from Brazil, Canada...antidumping duty orders\\1\\ on certain iron construction castings from Brazil,...

2010-09-08

481

40 CFR 63.5820 - What are my options for meeting the standards for continuous lamination/casting operations?  

Code of Federal Regulations, 2011 CFR

...meeting the standards for continuous lamination/casting operations? 63.5820...lamination line and each continuous casting line complies with the applicable...continuous lamination and continuous casting lines combined, comply...

2011-07-01

482

40 CFR Table 11 to Subpart Wwww of... - Data Requirements for New and Existing Continuous Lamination and Continuous Casting Lines...  

Code of Federal Regulations, 2011 CFR

...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...continuous lamination lines and continuous casting lines you must determine...

2011-07-01

483

40 CFR Table 11 to Subpart Wwww of... - Data Requirements for New and Existing Continuous Lamination and Continuous Casting Lines...  

Code of Federal Regulations, 2013 CFR

...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...continuous lamination lines and continuous casting lines you must determine...

2013-07-01

484

40 CFR Table 11 to Subpart Wwww of... - Data Requirements for New and Existing Continuous Lamination and Continuous Casting Lines...  

Code of Federal Regulations, 2012 CFR

...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...continuous lamination lines and continuous casting lines you must determine...

2012-07-01

485

40 CFR 63.5820 - What are my options for meeting the standards for continuous lamination/casting operations?  

...meeting the standards for continuous lamination/casting operations? 63.5820...lamination line and each continuous casting line complies with the applicable...continuous lamination and continuous casting lines combined, comply...

2014-07-01

486

40 CFR 63.5820 - What are my options for meeting the standards for continuous lamination/casting operations?  

Code of Federal Regulations, 2012 CFR

...meeting the standards for continuous lamination/casting operations? 63.5820...lamination line and each continuous casting line complies with the applicable...continuous lamination and continuous casting lines combined, comply...

2012-07-01

487

40 CFR 63.5820 - What are my options for meeting the standards for continuous lamination/casting operations?  

Code of Federal Regulations, 2010 CFR

...meeting the standards for continuous lamination/casting operations? 63.5820...lamination line and each continuous casting line complies with the applicable...continuous lamination and continuous casting lines combined, comply...

2010-07-01

488

40 CFR Table 11 to Subpart Wwww of... - Data Requirements for New and Existing Continuous Lamination and Continuous Casting Lines...  

...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent...continuous lamination lines and continuous casting lines you must determine...

2014-07-01

489

40 CFR 63.5820 - What are my options for meeting the standards for continuous lamination/casting operations?  

Code of Federal Regulations, 2013 CFR

...meeting the standards for continuous lamination/casting operations? 63.5820...lamination line and each continuous casting line complies with the applicable...continuous lamination and continuous casting lines combined, comply...

2013-07-01

490

Use of duplex stainless steel castings in control valves  

SciTech Connect

Duplex stainless steels have enjoyed rapidly increasing popularity in recent years. For numerous reasons the availability of these alloys in the cast form has lagged behind the availability of the wrought form. Commercial demand for control valves in these alloys has driven development of needed information to move into production. A systematic approach was used to develop specifications, suppliers and weld procedures. Corrosion, stress corrosion cracking (SCC), sulfide stress cracking (SSC) and hardness results are also presented for several alloys including; CD3MN (UNS J92205), CD4MCu (UNS J93370) and CD7MCuN (cast UNS S32550).

Gossett, J.L. [Fisher Controls International, Inc., Marshalltown, IA (United States)

1996-07-01

491

On thermal shock resistance of austenitic cast irons  

NASA Astrophysics Data System (ADS)

This research applied rapid induction heating and water quenching cycles to study the thermal shock resistance of high-nickel austenitic cast irons. Both flake graphite (FG) and compacted graphite (CG) cast irons were evaluated. In addition, alloying of cobalt and (Cr + Al) to the high-nickel base materials was performed to produce ultralow thermal expansion and hightemperature specialty irons. Microstructural analysis, as well as mechanical and thermal properties testings, was performed to find out the relationship among microstructures, properties, and thermal shock resistance of the materials under investigation.

Lee, Shen-Chih; Weng, Lin-Chao

1991-08-01

492

Make a Cast of a Tyrannosaurus rex Fossil  

NSDL National Science Digital Library

In this activity, learners explore dinosaur fossils by making cast models of a T. rex. First, learners read about and research how dinosaur fossils form. Next, learners make impressions in clay using a T. rex tooth. Finally, learners use plaster of paris to make casts of a T. rex tooth or claw. Although this activity is written as a two-day lesson, it could be easily modified into a one-day lesson. However, the wet plaster must dry overnight. This activity is featured on pp. 31-32 of the "Dinosphere" unit of study for K-2 learners.

Rick Crosslin

2004-01-01

493

In vivo microleakage of luting cements for cast crowns.  

PubMed

Standardized tooth preparations were completed on previously intact human molars in vivo, and castings were made with a precious metal ceramic alloy by conventional techniques. The castings were randomly assigned to the following luting agents: zinc phosphate, composite resin-glass ionomer hybrid, and a composite resin-glass ionomer hybrid with a dentinal bonding agent and were cemented in a standardized manner to periodontally compromised molars. After 6 months the teeth were carefully extracted, stained, embedded, and sectioned, and the in vivo microleakage was measured. ANOVA disclosed significant differences between groups, and a multiple comparisons test revealed that the zinc phosphate group leaked significantly more than other cement groups. PMID:8195995

White, S N; Yu, Z; Tom, J F; Sangsurasak, S

1994-04-01

494

Intratubular hemoglobin casts in hemolysis-associated acute kidney injury.  

PubMed

Kidney injury is a complication of intravascular hemolysis associated with many forms of hemolytic disease. Reports of kidney biopsy findings in patients with hemolysis-related kidney injury have focused primarily on the accumulation of hemosiderin pigment within proximal tubular epithelial cells (hemosiderosis), a feature of chronic hemolysis. The nephrotoxic effects of hemoglobin include direct cytotoxicity to tubular cells, but hemoglobin also can precipitate in distal nephron segments, forming obstructive casts. We present a case of hemolysis-associated tubular injury, characterized by acute onset of intravascular hemolysis followed by acute kidney injury with acute tubular injury and abundant intratubular casts containing hemoglobin. PMID:25441434

Khalighi, Mazdak A; Henriksen, Kammi J; Chang, Anthony; Meehan, Shane M

2015-02-01

495

Vascular casting for the study of vascular morphogenesis.  

PubMed

Microvascularity and angiogenesis play a pivotal role during normal growth and in a variety of pathological conditions such as inflammation, tumor growth, macular degeneration, and tissue regeneration. Vascular corrosion casting has been established as a method to analyze and evaluate two- and three-dimensionally the morphology and architecture of blood vessels of organs and tissues, such as tumors, brains, embryos, or the chorioallantoic membrane. Microvascular casts may be further dissected for visualizing and quantifying vascular morphology using scanning electron microscopy (SEM), micro computed tomographic (?CT) imaging, or synchrotron radiation-based micro computed tomographic (SR?CT) imaging. PMID:25468599

Ackermann, Maximilian; Konerding, Moritz A

2015-01-01

496

Tape-cast sensors and method of making  

DOEpatents

A method of making electrochemical sensors in which an electrolyte material is cast into a tape. Prefabricated electrodes are then partially embedded between two wet layers of the electrolyte tape to form a green sensor, and the green sensor is then heated to sinter the electrolyte tape around the electrodes. The resulting sensors can be used in applications such as, but not limited to, combustion control, environmental monitoring, and explosive detection. A electrochemical sensor formed by the tape-casting method is also disclosed.

Mukundan, Rangachary (Santa Fe, NM); Brosha, Eric L. (Los Alamos, NM); Garzon, Fernando H. (Santa Fe, NM)

2009-08-18

497

VIEW OF INTERIOR OF SOUTHERN DUCTILE CASTING COMPANY, CENTERVILLE FOUNDRY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF INTERIOR OF SOUTHERN DUCTILE CASTING COMPANY, CENTERVILLE FOUNDRY SHOWING MOLD MAKING WITH PNEWMATIC JOLT SQUEEZE COPE AND DRAG MOLDING MACHINES THAT INDIVIDUALLY MADE EITHER A COPE OR DRAG AND A SMALL WHEELED MATCHPLATE JOLT-SQUEEZE MACHINE THAT COMPRESSED AN ENTIRE MOLD AT A SINGLE TIME USING A DOUBLE-SIDED PATTERN (MATCHPLATE). ALSO SHOWN ARE RAILED PALLET CAR CONVEYORS THAT CARRIED COMPLETED MOLDS FROM MOLDING MACHINES TO POURING AREAS WHERE WORKERS USED SMALL OVERHEAD CRANE TO LIFT JACKETS AND WEIGHTS ONTO THE MOLDS TO HOLD THEM TOGETHER WHILE POURING. - Southern Ductile Casting Company, Centerville Foundry, 101 Airport Road, Centreville, Bibb County, AL

498

Effective safety training programs for aluminum cast shops  

NASA Astrophysics Data System (ADS)

To compete effectively in a global economy, aluminum casting operations must develop and maintain a qualified and competent workforce. A significant part of this effort must center on employee training, especially safety training. In addition to providing employees with accurate information, effective safety training programs will recognize certain principles governing human behavior. This paper reviews topical content appropriate for safety training programs to be used in aluminum casting operations and suggests ways to enhance the effectiveness of such training by incorporating principles of human behavior.

Ekenes, J. Martin

2001-11-01

499

Genetic Evidence on the Origins of Indian Caste Populations  

E-print Network

. Thus, to increase the power of our analysis, we assayed 40 independent, biparentally inherited autosomal loci (1 LINE-1 and 39 Alu elements) in all of the caste and continental populations (?600 individuals). Analysis of these data demonstrated... subcontinent (Mountain et al. 1995; Kivisild et al. 1999) and to ?350 Africans, Asians, and Europeans (Jorde et al. 1995, 2000; Seielstad et al. 1999). RESULTS Analysis of mtDNA Suggests a Proto-Asian Origin of Indians MtDNA HVR1 genetic distances between caste...

Bamshad, Michael; Kivisild, Toomas; Watkins, W. Scott; Dixon, Mary E.; Ricker, Chris E.; Rao, Baskara B.; Naidu, J. Mastan; Prasad, B. V. Ravi; Reddy, P. Govinda; Rasanayagam, Arani; Papiha, Surinder S.; Villems, Richard; Redd, Alan J.; Hammer, Michael F.; Nguyen, Son V.; Carroll, Marion L.; Batzer, Mark A.; Jorde, Lynn B.

2001-11-01

500

Note: Vignetting calibration and temperature correction for casting billets.  

PubMed

A method for calibration of vignetting coefficient is proposed in this paper to solve the distortion of temperature measurement using a CCD-based pyrometer. On this basis, a hybrid temperature measurement system, which comprises of an array CCD camera with high resolution and a single spot colorimetric thermometer, is introduced to eliminate the influences of surface striped iron oxide scale, dust, and emissivity on temperature measurement for casting billets. Currently, the system has been successfully applied and verified in some continuous casting production lines. The vignetting estimation error of 0.052 and the maximum temperature measurement fluctuation of 5 °C were achieved in these measurements. PMID:24089881

Xie, Zhi; Zhang, Yuzhong; Hu, Zhenwei; Bai, Haicheng

2013-09-01