... Title : Effect of the Rolling Texture on the Formation of the Bond in Diffusion Bonding Titanium Alloys,. Corporate Author : ...

The 7075 alloy is an Al-Zn-Mg-Cu wrought age-hardenable aluminum alloy widely used in the aeronautical industry. The alloy was accumulative roll bonded at 300 �C (573 K), 350 �C (623 K), and 400 �C (673 K), and the microstructure, texture, and hardness were investigated. Cell/(sub)grain size in the nanostructured range, typical ...

... Title : Fracture and Fatigue of Diffusion, Adhesive, and Roll Bonded Aluminum, Titanium, and Ultrahigh Carbon Steel Laminates. ...

... Title : CORROSION BEHAVIOUR OF ALUMINIUM ROLL-BOND ABSORBERS FOR SOLAR COLLECTORS,. Corporate Author : ...

In this study Ti-foils were roll bonded together with commercially pure aluminium AA1050. The laminates were produced by using two 1 mm thick AA1050 sheets at the outer side of the stack combined with 100 ?m thick Ti-foils as an intermediate layer for each accumulative roll bonding process. The ...

The aim of this study is to produce large quantities of bulk zirconium with an ultrafine grained microstructure and with enhanced properties. Accumulative roll bonding (ARB), a severe plastic deformation technique based on rolling, is chosen due to its availability in industrial environment. The texture, ...

Interstitial free (IF) steel with an ultrafine microstructure has been produced by three different routes: (i) cold rolling, (ii) accumulative roll-bonding (ARB) and (iii) martensitic transformation followed by cold rolling. The microstructure refines with increasing strain without saturation to a value of about ...

In this paper, clad sheet bonding by cold rolling was investigated using the upper bond theorem. Plastic deformation behavior of the strip at the roll gap was investigated, unlike previous methods; distinctive angular velocities are used for different zones in roll gap in present model and ...

... XPLOSI YE, AND ROLL BONDED I/AI AND Ti/Al LAMINATES R. D. Goclsby ... Fifl ýp@t. I- and Roll Bonded Al/Al and Ti/Al Laminates~"e, ...

Roll bonded heat pipes for solar collector applications are discussed. Thermodynamics of roll bonded plates with integrated heat exchanger were examined for different geometrical configurations. Prototypes were laboratory checked and modified. A strength ...

... BY PREHEATING IN EITHER AIR OR ARGON AND SUBSEQUENTLY ROLL ... TRANSVERSE STRENGTH WAS INCREASED TO 46-70 KSI BY ...

... Heating was performed in either air or argon with properties equivalent to ... and secondary roll bonding with 200 KSI longitudinal and 46-70 KSI ...

... The fabrication methods include deep drawing, roll bonding, and superplastic forming in combination with the joining techniques diffusion bonding ...

... Title : BONDED JOINTS AND NONDESTRUCTIVE TESTING - NDT OF RESISTANCE SPOTS, ROLL-SPOT, STITCH AND SEAM WELDS. ...

Pure copper was intensely deformed by accumulative roll bonding (ARB) for up to eight cycles at ambient temperature. X-ray diffraction (XRD) was used to evaluate the grain size and texture during the ARB process. The Williamson-Hall method was used to calculate the grain size from the XRD patterns, which was about 30 nm after eight ...

The strength of a biomedical ?-type alloy, Ti-25Nb-3Zr-3Mo-2Sn, was enhanced through severe plastic deformation using a modified accumulative roll bonding technique. Incremental strength increases were observed after each cycle, while ductility initially fell but showed some recovery with further cycles. After 4 cycles there was a 70% ...

The aluminium alloy AA5754 is used for many technical applications. In this work, the accumulative roll bonding process is applied to this alloy in order to investigate the potential of an ultrafine-grained structure on the mechanical properties of this Al-Mg alloy. Sheets from AA5754 (AlMg3) were successfully processed by ...

... Title : Effect of Strain Accumulation and Dynamic Recrystallisation on the Flow Stress of HSLA Steels During Flat Rolling. ...

As a simple theoretical model of a cell adhering to a biological interface, we consider a rigid sphere moving in a viscous shear flow near a wall. Adhesion forces arise through intermolecular bonds between receptors on the cell and their ligands on the wall, which form flexible tethers that can stretch and tilt as the base of the cell moves past the wall; binding kinetics is ...

... METALLURGY)), (*DIFFUSION BONDING, PANELS), LAMINATES, METALS, TITANIUM ALLOYS, BERYLLIUM ALLOYS, WELDING, NICKEL ...

], spark welding [3], explosive bonding [4], and diffusion bonding [5,6]. However, the processing such as diffusion bonding [5,6], friction welding [7e11], vacuum roll bonding [12] and hot roll bonding [13, respectively, in a background pressure of 6.0 ...

A low-cost process for the primary roll diffusion bonding of boron-aluminum monotapes and multi-ply panels in air was developed. Heating was performed in either air or argon with properties equivalent to higher cost vacuum and press bonded material. The a...

A fully annealed AA8011 aluminum alloy sheet containing a number of large particles (�5 �m) was severely deformed up to an equivalent strain of 12 by an accumulative roll-bonding (ARB) process. The texture evolution during the ARB process was clarified, along with the microstructure. The ARB-processed aluminum alloy sheets had a different texture ...

A deoxidized low-phosphorous copper (DLPC) was processed by accumulative roll-bonding (ARB). The evolution of nano-grains in DLPC with the ARB was investigated by TEM and EBSD analysis. TEM observation revealed that the ultrafine grains equiaxed to ND and elongated to RD developed in the sample after 8-cycle ARB. In addition, it was found that the mean ...

Copper can be diffusion-bonded to depleted uranium (D38). The use of an interlayer, such as nickel, reduces the temperature required for the diffusion bond. The diffusion bonding can be accomplished with either a vacuum hot press or hot isostatic press, producing bonded products with the strength to withstand the ...

... Abstract : Initial studies performed on small laboratory-size panels indicated that Rene 41 is amenable to roll-diffusion bonding. ...

... Report Date : 16 AUG 1972. Pagination or Media Count : 12. Abstract : A series of experiments with bonding niobium to copper or a copper alloy by ...

The use of large surfaced aluminum roll bond panels with an integral flow system as heat pipes is studied. With a suitable flow system e.g., parallel passages with a cross-connection, one single filling procedure is required for the operating medium. Adeq...

Equipment and procedure for the continuous roll bonding of metal strips are described. The reels, mill rolls, and furnace were located within a vacuum chamber capable of operation at a residual gas pressure of 0.0001 to 0.00001 torr. Several metals were s...

Metal matrix composites consisting of continuous boron fibers in an aluminum matrix have been made by roll bonding thin tapes consisting of aligned fibers surrounded by plasma-sprayed aluminum. The bonding was carried out by conventional hot rolling and in a newly designed rolling mill with ...

A process is described for producing a metal composite adapted for use in heat exchanger panels comprising: providing at least two sheets of metal; cold rolling said sheets of metal together to a desired reduction in thickness to form a green bond therebetween; and immediately after said cold rolling, quickly cooling said green ...

The relaxation of two-dimensional quasicrystalline elastic networks when their constituent bonds are

Metallurgical bonding of Zircaloy-2 and Type 410 stainless steel tubular assemblies and the end capping of SAP alloy fuel sheaths by cold-bonding methods were investigated as a part of the USAEC/AECL Cooperative Program. Approaches considered included friction bonding and forming, cold roll ...

Wall shear stress in postcapillary venules varies widely within and between tissues and in response to inflammation and exercise. However, the speed at which leukocytes roll in vivo has been shown to be almost constant within a wide range of wall shear stress, i.e., force on the cell. Similarly, rolling velocities on purified selectins and their ...

Accumulative roll bonding (ARB) has been considered as one of the promising techniques for fabrication of ultra-fine grained (UFG) metallic materials. The ARB process consists of several cycles of cutting, stacking, and rolling of metal sheets, so very high strains can be induced in the material resulting in ...

Two kinds of light metal having different flow resistance were bonded by hot rolling, hot extrusion, and cold rolling. In the case of cladding by cold rolling, the combination of titanium and aluminum alloys (24S) was bonded for the investigation of some defects such as nipple and crack. ...

The ultrafine grained aluminium alloy AA6016 produced by accumulative roll bonding (ARB) up to eight cycles was deformed in tension at 25K, 77K, 180K and 296K at a constant strain rate. The stress-strain curves were analyzed with regard to the evolution of yield stress ?p, ultimate stress ?m and fracture strain ef as a function of ...

Deformation behavior of a commercial purity aluminium (99% purity) highly deformed by the accumulative roll-bonding (ARB) process was investigated by analyzing the change in the specimen shape during tensile test precisely. True stress obtained by the specimen shape analysis of the conventionally coarse grained material was found to increase continuously ...

The use of sleeved rolls in the blooming stand ahead of a continuous semifinishing mill is treated. Two sleeved rolls were produced. One comprises a tough steel arbor and the wear resistant roll sleeve of Cr-Ni-Mo-alloyed spheroidal cast iron with carbide. Both parts were joined together in an unstressed manner by adhesive ...

The fracture characteristics of twelve different diffusion bonded Al/Al, Ti/Ti and Ultrahigh Carbon Steel/Iron and adhesively bonded Al/Epoxy laminates were evaluated. The effects of periodic overloads on the fatigue crack retardation behavior in a roll b...

The results of the fabrication by roll bonding of metal-metal laminates and the fatigue and fracture toughness testing of these laminates are reported and discussed. Laminate panels have been prepared from layers of steel alloy 300M interleaved with thin ...

The use of diffusion bonding processes at Rolls-Royce for the manufacture of titanium-alloy aircraft engine components and structures is described. A liquid-phase diffusion bonding process called activated diffusion bonding has been developed for the manufacture of the hollow titanium wide chord fan blade. In ...

Bulk aluminium has been produced by warm-rolling followed by cold-rolling of commercial purity (99% purity) aluminium foil. The bonding appeared perfect from observation with the naked eye, light and transmission electron microscopy. By comparison with bulk aluminium of similar purity (AA1200) rolled to a similar ...

A method of cladding thorium with zirconium is described. The quality of the bond achieved between thorium and zirconium by hot-rolling is improved by inserting and melting a thorium-zirconium alloy foil between the two materials prior to rolling. (AEC)

A feasibility study was conducted to determine whether explosively welded steel patches could be used for battlefield repair of tank armor. Mild steel patches were bonded to rolled homogeneous armor plates in the laboratory and to the glacis and turret of...

Initial studies performed on small laboratory-size panels indicated that Rene 41 is amenable to roll-diffusion bonding. However, completely satisfactory practice has not yet been defined. In addition, the experimentation has shown that Ti-Namel steel is a...

It is the objective of this article to investigate the influence of surface preparation on the cold roll bonding (CRB) process. In this context, the effects of surface preparation parameters consisting of surface preparation method, surface roughness, scratch-brushing parameters, and the delay time between surface preparation and ...

During inflammation, flowing leukocytes tether to and roll on vascular surfaces through the association and dissociation of selectin/ligand bonds. The interactions of P- and L- selectins with their respective ligands exhibit catch-slip bonds, such that increasing force initially prolongs and then shortens bond ...

During inflammation, flowing leukocytes tether to and roll on vascular surfaces through the association and dissociation of selectin/ligand bonds. The interactions of P- and L- selectins with their respective ligands exhibit catch-slip bonds, such that increasing force initially prolongs and then shortens bond ...

of gross pay roll invested in War Bonds. In a communi- cation received here from John ... Food and Drug Administration ,. 10. 9; Treasury Department , ...

cold rolling. It was found that the bond strength in TD-Nichrome ..... Hitachi HU-11B electron microscope. Scanning electron microscopy ...

... Report Date : 05 NOV 1971. Pagination or Media Count : 6. Abstract : ;Contents: Hybrid composites, Beryllium-wire reinforced alloys by roll bonding ...

... shieldinci, specifications, and twin conductor (triax and twin lead) cables. ... foil: (2) the joint between two blocks of coll-rolled ... method is Ftuaqested. ...

... Title : Fabrication of Intermetallic Compounds by Solid State Reaction of Roll- Bonded Materials. Descriptive Note : Quarterly progress rept. no. ...

... Corporate Author : SANDIA NATIONAL LABS ALBUQUERQUE NM. Personal Author(s) : MOSS, M. ; CYRUS, WL ; HAIZLIP, CB. Report Date : 1972. ...

... Accession Number : ADA477245. Title : Development of Large Scale Advanced NI-CD Batteries Employing Roll-Bonded Electrodes. ...

Accumulative roll bonding (ARB) is a very attractive process for processing large sheets to achieve ultrafine-grained microstructure and high strength. Commercial purity Al and many Al alloys from the 5xxx and the precipitation strengthened 6xxx alloy series have been successfully processed by the ARB process into an ultrafine-grained ...

SUMMARYIn the intestine, enterotoxigenic Escherichia coli works against peristaltic forces, adhering to the epithelium via the CFA/I fimbrial adhesin CfaE. The CfaE adhesin is similar in localization and tertiary (but not primary) structure to FimH, the type 1 fimbrial adhesin of uropathogenic Escherichia coli, which shows shear-dependent binding to epithelial receptors by an allosteric ...

A nanostructured deoxidized low-phosphorous copper (DLPC) was fabricated by three-layer stack accumulative roll-bonding (ARB) process. The microstructural evolution and the variation of mechanical properties with three-layer stack ARB were investigated in detail. It was found that the microstructure has been evolved from a dislocation cell structure to ...

Our work deals with accumulative roll bonding (ARB) of pure Mg sheet (0.9mm thickness) and of Al5052 sheet (0.5mm). A stacking of Al-Mg-Al was firstly rolled to 50% reduction at 400�C and secondly ARB has been processed up to 3 cycles. In such multilayers as well as highly mixed composites of two-phased system ...

We present a high-volume fabrication technique for making polymer lab-on-a-chip devices. Microfluidic separation devices, relying on pinched flow fraction, are roll-to-roll fabricated in a cellulose acetate (CA) film at a volume of 360 devices h?1 for a cost of approximately 0.5 euro/device. The manufacturing process consists of two steps: (i) roll-to-roll ...

The Impact of Glass Transition. Temperature of Molding Compounds ..... water needed for corrosion from accumulating at the bond pad surface. ...

BS>Development progress on the following fabrication techniques is discussed: melting, hot and cold working, cladding by rolling and swaging, pressure bonding, diffusion bonding, extrusion cladding, canning, electroplating, nonelectrolyte chemical plating techniques, welding, and brazing. (62 references). (M.C.G.)

Process for bonding copper foil to a foil superconductor of the type having a surface layer of Nb/sub 2/Sn. The foils are brought together with a low melting solder in between and passed through spaced rolls.

... 2Fe-3Al interleaved with Ti-15V-3Cr-3Al-3Sn by roll bonding and from Ti-6Al-4V interleaved with commercially pure titanium by diffusion bonding. ...

Flaw growth behavior in roll diffusion bonded and adhesive bonded 2219-T87 aluminum alloy was compared to that in monolothic 2219-T87. Based on tests at 40 KSI cyclic stress, for equivalent cyclic life, a .004 interlayer laminate can tolerate a surface fl...

Subject Terms: DIFFUSION WELDING; FUEL TANKS; LAUNCH VEHICLES; MANUFACTURING; METAL BONDING; ROLL FORMING; SATURN S-1C STAGE; SKIN (STRUCTURAL MEMBER); ...

... rolled Ti-6Al-2Cb-1Ta-0.8Mo alloy titanium was undertaken as a first step in determining the feasibility of using out-of-chamber diffusion bonding for ...

thiolated by binding a bilinker molecule (2-aminoethanethiol: AET) through an amide bond. The SWNT�COOH bond physical properties. Envisioned as a rolled- up graphene sheet capped with fullerene-like structures

BOND%20HILL&featuretype=LITERAL&missionoption=X&sort=pdate%20DESC,mission,roll ...

Selectin-mediated rolling of polymorphonuclear leukocytes (PMNs) on activated endothelium is critical to their recruitment to sites of inflammation. The cell rolling velocity is influenced by bond interactions on the molecular scale that oppose hydrodynamic forces at the mesoscale. Recent studies have shown that PMN ...

... 1986). For instance, drought-tolerant plants exhibit high proline accumulation under low-water stress conditions (Sivaramakrishnan et ... that are involved in osmotic adjustment such as proline and sugars...

A solid-state bonding technique involving the use of gas pressure at elevated temperatures was utilized for the self-bonding of molybdenum and niobium. Bonding conditions and surface preparation as a function of the integrity of the bond achieved were evaluated for each material. Optimum ...

Rolling adhesion on vascular surfaces is the first step in recruiting circulating leukocytes, hematopoietic progenitors, or platelets to specific organs or to sites of infection or injury. Rolling requires the rapid yet balanced formation and dissociation of adhesive bonds in the challenging environment of blood flow. This review ...

Thermal point bonding (TPB) uses heat and pressure to bond a web of fibers at discrete points imparting strength to the manufactured fabric. This process significantly reduces the strength and elongation of the bridging fibers between bond points while strengthening the web. Single fiber experiments were performed with four ...

The five-ball fatigue tester was used to study the behavior of nickel- bonded titanium carbide cermet and self-bonded silicon carbide balls under repeated stresses applied in rolling contact. Test conditions were 800 and 700 F, a contact angle of 200, and...

Selectin-mediated leukocyte rolling under flow is an important process in leukocyte recruitment during inflammation. The rolling motion of individual cells has been observed to fluctuate randomly both in vivo and in vitro. This paper presents a stochastic model of the micromechanics of cell rolling and provides an analytical method of ...

Motivated by rolling adhesion of white blood cells in the vasculature, we study how cells move in linear shear flow above a wall to which they can adhere via specific receptor-ligand bonds. Our computer simulations are based on a Langevin equation accounting for hydrodynamic interactions, thermal fluctuations, and adhesive interactions. In contrast to ...

At least five large landslides occurred in Tsaoling area are induced by big earthquake and heavy rainfalls since 1862 to 1999. The recent catastrophic Tsaloing landslide was triggered by 1999 Chi-Chi earthquake triggered, which mobilized about 0.125 cubic kilometer of rock and soil that slid across the Chingshui River and created a 5 km long natural dam. One fifth of the landslide mass dropped ...

Metal flow and strain distribution in the flat rolling of Sn-Pb alloy powder are experimentally analyzed by the modified visioplasticity method. The alloy powder is packed in a container of 10mm square made of aluminum foil and rolled up to 80% reduction in height. After the interruption of rolling, distorted shapes of the powder ...

Selectin-mediated rolling of polymorphonuclear leukocytes (PMNs) on activated endothelium is critical to their recruitment to sites of inflammation. Recent studies have shown that PMN rolling velocity on selectin-coated surfaces in shear flow is significantly slower compared to that of microspheres bearing a similar density of selectin ligands. To ...

A silver-cadmium oxide material having throughout a substantially uniform cadmium oxide distribution and suitable for use as electrical contact material is made from silver-cadmium oxide having an internal cadmium oxide depleted zone. The layers are bonded together by hot rolling which reduces the bonded material to a thickness less ...

In the present work, tribocorrosion behavior of Al/Al2O3 composite strips manufactured by anodizing and accumulative roll bonding (ARB) processes was investigated. The alumina quantity was 0.48, 1.13, and 3.55 vol.% in the aluminum matrix. Tribocorrosion experiments were conducted using a ball-on-plate tribometer, where the sliding ...

Development of cube texture ({100}<001>) was studied in high-purity Ni (99.97 pct) with widely different starting grain sizes ( 28 and 650 ?m) following ultrahigh straining (? eq = 6.4) by accumulative roll bonding (ARB) and annealing. The fine-grained starting material (FGSM) develops a much stronger cube texture after ...

Development of cube texture ({100}<001>) was studied in high-purity Ni (99.97 pct) with widely different starting grain sizes ( 28 and 650 ?m) following ultrahigh straining ( ? eq = 6.4) by accumulative roll bonding (ARB) and annealing. The fine-grained starting material (FGSM) develops a much stronger cube texture after ...

The deformation behaviour of the aluminium alloy AA6016 at low temperatures was investigated in the initial state and after 4 and 8 cycles of accumulative roll bonding (ARB). Tensile tests at 25 K, 77 K, 180 K and 296 K were performed at constant strain rate 10?4 s?1. Stress relaxation experiments performed during the tensile tests ...

Ultrafine grained (UFG) metals have remarkably high strength in comparison with that of coarse grained metals. However, the UFG metals often exhibit low tensile ductility. It has been reported that the UFG metals having bimodal grain-size distributions consisting of coarse grains and fine grains perform large elongation keeping high strength. However, the exact deformation mechanism of the bimodal ...

Cold bonding methods were investigated for joining pressure tubes of Zircaloy-2 and type 410 stainless steel for the CANDU reactor. Friction bonding, modified roll forming techniques, and explosive joining were studied. Fuel sheath end capping studies employing Zircaloy-2 materials are also described. (D.L.C.)

Bonds between adhesion molecules are often mechanically stressed. A striking example is the tensile force applied to selectin-ligand bonds, which mediate the tethering and rolling of flowing leukocytes on vascular surfaces. It has been suggested that force could either shorten bond lifetimes, because work done by ...

The main focus of this thesis is the characterization of defects and microstructure in high-energy ball milled magnesium hydride powder and magnesium-based multilayered composites. Enhancement in kinetics of hydrogen cycling in magnesium can be achieved by applying severe plastic deformation. A literature survey reveals that, due to extreme instability of alpha-MgH 2 in transmission electron ...

A 3D computational model is presented to simulate transient rolling adhesion and deformation of leukocytes over a selectin coated surface in shear flow. The model is based on immersed boundary method for cell deformation, and Monte Carlo simulation for receptor/ligand interaction. The model is shown to predict the characteristic `stop-and-go' motion of ...

... but damage had accumulated (ie, broken wire bonds, junction failure, and damage that was incurred when the thin window broke) and only two ...