Wear 252 (2002) 322�331 A physically-based abrasive wear model for composite materials Gun Y. Leea 2001 Abstract A simple physically-based model for the abrasive wear of composite materials is presented-matrix composite material. � 2002 Elsevier ...
E-print Network
A simple physically-based model for the abrasive wear of composite materials is presented based on the mechanics and mechanisms associated with sliding wear in soft (ductile) matrix composites containing hard (brittle) reinforcement particles. The model i...
National Technical Information Service (NTIS)
The author proposes a wear model for the abrasive wear of solids. The model scheme is based on the following: microscopic contacts appearing in the course of friction of deforming surfaces exist in coupled states of adhesion and slip which do not prevent ...
Abrasive wear is the most common type of wear that causes failure of machine elements. Examinations of abraded surfaces revealed presence of embedded particles and grooves elongated along the sliding direction. This indicates that, there are two sequential stages of an abrasion process. In the first stage, ...
Energy Citations Database
... Title : The Abrasive Wear of Borosilicate Glass. Descriptive Note : Journal article,. ... Abstract : The abrasive wear of borosilicate glass was studied. ...
DTIC Science & Technology
This monograph gives a general classification of the various types of wear, including abrasive wear; it describes the principles and systems of laboratory tests for abrasive wear, the regularities of this form of wear under various conditions - during fri...
... federally funded research, testing and training ... for Research Development Test and Evaluation ... wear resistance data, abrasion tests, quenchings. ...
... from federally funded research, testing and training ... and realization of model wear test systems closely ... mechanism on the abrasion resistance of ...
This paper is an overview of brittle material responses to abrasion. It proposes a 3 region model for both 2-body and 3-body wear, two regions being where removal rate is nearly independent of abrasive size at otherwise identical conditions and a transiti...
Results are presented of an investigation of the effect on cutting of certain abrasive-jet parameters. Two cutting modes that may be obtained during abrasive-jet cutting are identified. The first, cutting wear, is a micromachining process that contributes...
... Title : ABRASIVE WEAR RESISTANCE OF POLYMERS USED IN ULTRASONIC FLAW INSPECTION. Corporate Author : ...
... Accession Number : AD0682112. Title : ABRASIVE WEAR RESISTANCE OF CONSTRUCTIONAL MATERIALS AND MACHINE PARTS,. ...
A simple physically-based model for the abrasive wear of composite materials is presented based on the mechanics and mechanisms associated with sliding wear in soft (ductile) matrix composites containing hard (brittle) reinforcement particles. The model is based on the assumption that any ...
DOE Information Bridge
... Title : The Problem of the Dependence of Wear Resistance of Metals during Abrasive Wear on Their Physicomechanical Properties,. ...
... ABRASIVE WEAR OF MATERIALS IN A BLAST FURNACE UNDER ACTUAL WORKING CONDITIONS by ... 09.TI1rLE ABRASIVE WEAR OF ...
An investigation of two-body abrasive wear utilizing a pin specimen on a rotating SiC particle abrasive paper test device is described. The test materials were 7075 aluminum and 4340 steel which were thermally treated to attain a range of hardness, fracture toughness and yield strength values. Wear resistance is ...
The occurrence of wear between two unlubricated surfaces in relative motion one against the other presents several open questions, both on the macroscale and nanoscale. This paper takes as a starting point some experiments of wear tests on ionic crystals that have recently been presented. Two different wear mechanisms are discussed for ...
NASA Astrophysics Data System (ADS)
... only abrasive but also corrosion wear has been established [1-5]. ... Since abrasive wear is taken as the main mechanism of wear, ...
The formulation of a procedure to model wear of surfaces exposed to a fluidized bed is discussed. A stochastic methodology adapting kinetic theory of gases to granular flows is used to derive an impact wear model. It uses a single-particle wear model to account for impact ...
... abrasive are presented; and the capability of the grain geometry parameters to ... Subject Categories : SOLVENTS, CLEANERS AND ABRASIVES. ...
... Accession Number : AD0720379. Title : The Mechanism of the Variation in the Abrasive Wear Resistance of G13L Steel After Hardening,. ...
... Accession Number : AD0749769. Title : The Abrasive Wear Resistance of Vacuum-Condensed Coatings,. Corporate Author ...
... Title : STUDIES ON ABRASIVE WEAR OF MONOLITHIC SILICON NITRIDE AND A SILICON CARBIDE WHISKER-REINFORCED SILICON ...
... Accession Number : AD0724985. Title : Resistance to Abrasive Wear of Chromium Alloys with Additions of Carbide-Forming Elements,. ...
... Title : RESEARCH ON THE ABRASIVE WEAR RESISTANCE OF MANGANESE CAST IRON INOCULATED WITH CERIUM, USING THE Kh4-B ...
... Title : QUICK AND SIMPLE TEST FOR ABRASIVE WEAR RESISTANCE AND ITS PRACTICAL USE,. Corporate Author : ...
... Accession Number : ADD139343. Title : On the Abrasive Wear of AISI 4340 Steel,. Descriptive Note : Conference Paper,. ...
... IN A RUBBER-WHEEL ABRASION TEST (RWAT) AND ... IN A GRINDING WHEEL TEST (GWAT ... WEAR TESTING ON THE WHITE IRONS HAS BEEN ...
... The deformation studies included abrasive wear, elastic strain, and plas- ... Major results are as follows: 1. Abrasive Wear ...
... Title : Comparison of the Microstructures and Abrasive Wear Properties of Stellite Hardfacing Alloys Deposited by Arc Welding and Laser Cladding,. ...
... Title : ABRASIVE WEAR RESISTANCE OF STRUCTURAL STEELS DEPENDING ON THE HEAT-MECHANICAL TREATMENT (HIGH ...
... Accession Number : AD0193871. Title : ABRASION AND WEAR STUDIES BY MEANS OF RADIOACTIVE ISOTOPES. Corporate Author : ...
General theories of abrasive wear are reviewed, and wear is related to abrasive size, shape, hardness and degradation tendency. Treatment of matrix effects includes the roles of matrix microhardness, subsurface deformation and retained austenite on abrasion resistance. Discussion of second ...
The article examines the dependence of wear resistance of metals during abrasive wear on the basic physicomechanical parameters. The dependence of wear resistance and critical velocity on the same parameters during friction of metals on an abrasive surfac...
... Effect of Aging on the Abrasion Behavior of ... characteristics and data fields:, abrasions, aging data ... sizes, wear rates, wear resistances testing and test ...
... cu, whiskers, material characteristics and data fields:, abrasive wear data, fiber data testing and test conditions:, abrasion tests, sem manufacturing ...
A procedure to model the wear of surfaces exposed to a fluidized bed is formulated. A stochastic methodology adapting the kinetic theory of gases to granular flows is used to develop an impact wear model. This uses a single-particle wear model to account for impact ...
Contacting components frequently fail by abrasion caused by solid contaminants in the lubricant. This process can be classified as a closed three-body abrasive wear process. The mechanisms by which trapped particles cause material removal are not fully understood. This paper describes tests using model ...
... Title : The Influence of Particle Properties on the Erosive Wear of Sintered ... that their wear resistance depends on the nature of the abrasive particles. ...
The abrasive wear of brittle materials, while not a true property of materials, is generally modeled as an inverse function of both the bulk hardness and fracture toughness. According to these models, an increase in the hardness and/or fracture toughness of a material will therefore enhance its ...
The wear characteristics of an yttria-stabilized zirconia (Y-TZP) are represented by a set of three-dimensional wear maps under dry and lubricated conditions. Water, paraffin oil, and a formulated oil were used as lubricants. Different wear regions were identified as a function of load, speed, and lubrication environment. Sudden ...
Owing to the brittle reinforced phase are introduced into ductile matrix phase, metal intermetallic interpenetrating composites exhibit various types of wear mechanism such as adhesive, abrasive, and fatigue wear. In present work, the wear model has been proposed according to the mixing rule. ...
Tool wear prediction is regarded as very important task in order to maximize tool performance, minimize cutting costs and improve the quality of workpiece in cutting. In this research work, an experimental campaign was carried out at the varying of cutting conditions with the aim to measure both crater and flank tool wear, during machining of an AISI 1045 ...
The volume theory of ball wear ascribes ball consumption in grinding mills only to impactive wear, whereas the surface theory ascribes it only to abrasive wear, and ball-wear data are often in good agreement with either or both of these theories. In this ...
Research is presented which focuses on the micro-mechanical processes that dominate the friction and wear of rubber. New test concepts and equipment were developed to study the dynamic and kinematic effects involved in these processes. Several new analytical tools were presented to explain the observed results in quantifiable terms. Experiments conducted on filled NR confirmed ...
A numerical model is proposed for analysing the flank and crater wear resulting from the loss of material on cutting tool surface in turning processes due to wear mechanisms of adhesion, abrasion and fracture. By means of this model, the material loss along cutting tool surface can be analysed, ...
The dry reciprocating wear characteristics of two abrasion-resistant steels, C1095 and 15B37H, against an abrasive material were studied. Results showed that abrasive wear and surface fatigue were the primary wear mechanisms. The wear failure of the ...
A plain carbon steel was overlayed with a wear-resistant hardfacing alloy by manual arc welding. Low stress abrasive wear tests were conducted with an ASTM rubber wheel abrasion tester using crushed silica and as the abrasive medium. The wear rate decreased with sliding ...
... Title : Wear of Si3N4 Ceramics by Abrasive Water Jet. ... Abstract : The wear mechanism of ceramics by abrasive water jet (AWJ) has been studied. ...
... Title : The Effect of Abrasion Resistance and Thermal Properties of the Cemented Carbide Cutting Tool Grade on the Flank Wear Characteristics. ...
... from federally funded research, testing and training ... agencies for Research Development Test and Evaluation ... mechanisms in the abrasion of Co ...
... AND FOR GOUGING ABRASION TESTING, BASED ON A ... BEEN EVALUATED AS TEST STANDARDS FOR ... LOW-STRESS TESTING HAS BEEN ...
... from federally funded research, testing and training ... for Research Development Test and Evaluation ... AND HIGH-STRESS (GOUGING) ABRASION. ...
... from federally funded research, testing and training ... for Research Development Test and Evaluation ... ON THE ABRASION WEAR RESISTANCE OF ...
... Title : An Improved Multipurpose Abrasion Tester and Its Application for the Evaluation of the Wear Resistance of Textiles. ...
... Abstract : Mild alloy and stainless steels are compared regarding wear abrasion and corrosion resistance for tools and comminution devices. ...
An empirical approach to tool wear, which requires a series of machining tests for each combination of insert and work material, has been a standard practice for industries since early part of the twentieth century. With many varieties of inserts and work materials available for machining, the empirical approach is too experiment-intensive that the demand for the development ...
Aug 6, 2011 ... The Mars Pathfinder Rover Wheel Abrasion Experiment was designed to study the abrasive wear of the martian soil on various types of metals ...
NASA Website
... ABSTRACT A standard off-the-shelf Taber Abraser instrument is used to quantify the abrasive wear resistance of high-density polyethylene jackets ...
... Accession Number : ADD138359. Title : Wear Resistance of Steels Under Wet-Abrasive Erosion Conditions,. Descriptive Note : Journal Article,. ...
Results show that increased deformation in Duralumin during age hardening and after annealing increases the wear resistance to flowing abrasive particles. (R.V.J.)
... federally funded research, testing and training ... for Research Development Test and Evaluation ... for Severe Abrasion-Wear Hardfacing Application,. ...
... Abstract : Laboratory testing procedures used to evaluate ... for their resistance to adhesive wear and dry ... The abrasion test described utilizes a gravity ...
... wear resistances parameter values relevant to the data:, volume fractions testing and test conditions:, abrasion tests, abrasive wear tests, sem, three ...
... Title : Influence of a Corrosive-Abrasive Medium on the Wear Resistance of 12Kh18N10T Steel with Surface Hardening,. ...
... a strong grain size effect on abrasive wear mechanisms in ceramics, a series of tests were conducted under severe sliding contact conditions in an ...
... Accession Number : ADD201218. Title : Corrosion-Resistant and Abrasive Wear-Resistant Composite Material for Centrifugally Cast Linings,. ...
... Accession Number : ADD126259. Title : Abrasive Wear of Cast Aluminium Alloy-Zircon Particle Composites,. Corporate Author : ...
... Accession Number : ADD150069. Title : Abrasive Wear Study of Bainitic Nodular Cast Iron. Descriptive Note : Journal article,. ...
... Accession Number : ADD150868. Title : Abrasive Wear Resistance of High-Carbon Chrome-Nickel Steel. Descriptive Note : Journal article,. ...
This work provides readers with practical advice on the selection of wear resistant materials for specific engineering purposes. Contents include: general review of wear; nature of wear; fretting; three body abrasion; gouging wear; low stress abrasion; erosion; corrosive ...
The purpose of the M.I.T. research on wear during the calendar year 1977 was to apply the delamination theory of wear in minimizing the wear rate of splines and door hinges. The technique explored was the use of thin soft metal coatings on hard substrates...
containing dissolved inorganic salts NaCl,NaBr,NaI,CaCl2 and FeClg. Hardness values in the n-alcohols were used in wear models that describe the abrasion ...
including boron/epoxy, glass/epoxy, graphite/epoxy,. Kevlar/epoxy, .... surface delaminations, gouges, dents, and abrasive wear. Conventional ... The model he suggested, as a theoretical basis for the empirically ...
... from federally funded research, testing and training ... for Research Development Test and Evaluation ... Wear Debris; The Abrasion Characteristics of ...
... The wear and abrasion resistance of various plastics used for various applications (automotive brake linings, pipe linings, gun barrel surfaces ...
... Title : WEAR RESISTANCE OF HIGH-CHROMIUM STEELS IN AN AIR-ABRASIVE MEDIUM AT HIGH TEMPERATURES,. ...
... Abstract : The forms and character of wear of hydraulic turbines, axial and centrifugal pumps due to abrasion by suspended accretions and ...
... The epoxy compounds were more resistant to abrasion by sand blasting than the other compounds. The maximum wear ...
... from federally funded research, testing and training ... of simultaneous action of abrasion and chemical wear ... in a laboratory test, predict performance ...
... PRINCIPAL WEAR MECHANISMS INVOLVES REMOVAL OF PLASTICALLY DEFORMED, EXPOSED MATERIAL FROM THE LIPS OF IMPACT ...
... Wear resistance of Fiberglass Reinforced Polyester surfaces are usually considered to be somewhat less than that of melamine surfaced laminates. ...
... a flow of gas under conditions ... Descriptors : *BLAST FURNACES, CORROSION INHIBITION ... ELECTROCHEMISTRY, CORROSIVE GASES, WEAR ...
Wear of 440C angular contact ball bearings of the phase 2 high pressure oxygen turbopump (HPOTP) of the space shuttle main engine (SSME) has been studied by means of various advanced nondestructive techniques (NDT) and modeled with reference to all known material, design, and operation variables. Three modes dominating the wear ...
Abrasion by bed load is a ubiquitous and sometimes dominant erosional mechanism for fluvial incision into bedrock. Here we develop a model for bedrock abrasion by saltating bed load wherein the wear rate depends linearly on the flux of impact kinetic energy normal to the bed and on the fraction of the bed that is ...
The effect of composition on the wear resistance of plastics was studied. Wear was related qualitatively to friction, strength, and ductility. Two types of wear were analyzed: ordinary wear due to repeated surface deformation, and abrasive wear due to mic...
The two major goals of the project are to improve our understanding of the mechanisms of carbide removal and of the role of matrix properties in abrasion. In the area of carbide removal mechanisms, progress this year has included completion of the fixed-depth scratch test apparatus and its use to demonstrate the occurrence of gross carbide cracking under fixed-depth ...
Particle emissions of road traffic are generally associated with fresh exhaust emissions only. However, recent studies identified a clear contribution of non-exhaust emissions to the PM10 load of the ambient air. These emissions consist of particles produced by abrasion from brakes, road wear, tire wear, as well as resuspension of ...
... COMPARISON OF WARP AND FILLING DIRECTION ABRASION RESULTS ... inserted into a hole drilled into the ... was not possible to drill beyond this ...
A systematic study of abrasive wear resistance of Fe/Cr/Mn based alloys has been carried out using a two body pin-on-disc wear machine. Abrasives used were silicon carbide, alumina and quartz. The objective of this study was to evaluate the abrasive wear ...
... and agencies for Research Development Test and Evaluation ... DRY SLIDING, ABRASION, AND EROSION TESTING WAS PERFORMED. ...
The abrasion (wear) of tips used in scanning force microscopy (SFM) directly influences SFM image quality and is therefore of great relevance to quantitative SFM measurements. The increasing implementation of automated SFM measurement schemes has become a strong driving force for increasing efforts towards the prediction of tip wear, ...
The article presents the characteristics of pearlite rail steels used in the construction of railways. The article discusses the influence of isothermal annealing process parameters on the pearlite morphology and properties of the R260 steel. The pearlite structure with a diverse pearlite morphology was obtained in the physical modeling of the isothermal annealing on the 3800 ...
Quantitative models for the relative abrasive and chemical dissolution wear rates of potential tool coating materials are presented. Inputs to the models include the free energy of formation of the tool material, the excess free energies of solution of the constituent elements of the tool material in the workpiece, ...
Hard and super-hard materials have very good abrasive wear resistance. However, in many severe wear environments that make use of these materials, impact is a significant component of that environment. Consequently, the behavior of many of these hard materials in impact-wear conditions need to be understood with ...
The presence of hard abrasive particles in the impact zone between parts of machines is the reason for their intensiveabrasive-impact wear. No attempt to analytically account for the features of the interaction of hard abrasive particles with the wear surface during impact has been made, even though such ...
... and wear behavior which was primarily abrasive (Ref 5:38, 45). This ... fer plate and measuring its thickness with a micrometer. The wear of ...
In the progress report for 1977-1979, an extensive literature survey was completed in the areas of abrasive wear mechanisms, wear testing and microstructural effects on abrasive wear. Definitions of the various abrasive wear processes were clarified. A ...
Cemented carbides are used for a wide variety of applications where wear is a problem. Usually the wear of the cemented carbides is a combination of metal-to-metal and abrasion. Wear can occur at room or elevated temperatures. This research summarizes initial research to understand the abrasive ...
Aim of this research program is to establish the effect of mill size and batch or continuous operation on the role of corrosive and abrasive wear during mineral grinding operations. Grinding ball wear tests are being conducted on the laboratory, pilot pla...
The relative contributions of abrasion and corrosion and the effect of scale-up on the wear rates of three different grind materials in molybdenite and taconite ore milling under three mill atmospheres was investigated. A standardized marked ball wear tes...
... a digestive tract as opposed to occlusal or abrasive wear. None of the wear facets have the ... cusps and blades of this tooth show significant abrasive wear. The empty tooth spaces mesial to the ... ...
NBII National Biological Information Infrastructure
The book deals with theoretical and applied problems of the wear resistance of materials and machine parts. Main attention is devoted to abrasive wear which shortens the service life of agricultural, mining, construction, and other machines and industrial...
The material, mechanical, and clinical aspects of surface degradation of resin composite dental restorative materials by in vitro wear simulation continues to be an area of active research. To investigate wear mechanisms, a series of experimental resin composites with variable and controlled filler particle shape and loading were studied by in vitro ...
The friction and abrasive wear behaviour of an Al-Si1MgMn aluminium alloy reinforced with 10, 15 and 30 vol.% of alumina fibers has been evaluated. The influence of fiber content, matrix hardness, applied load as well as the hardness and size of the abrasive grits was investigated. The tests were performed with a pin-on-drum two-body ...
Topical fluorides have been proposed for the prevention of erosive dental wear. This study evaluated the in vitro effect of a single professional application of 4% titanium tetrafluoride (TiF4), 1% amine fluoride (AmF) and 0.1% difluorosilane varnish (FV) in preventing wear due to combined erosion and brushing abrasion. One hundred and ...
PubMed
The use of ferrographic analysis in conjunction with light and scanning electron microscopy is described for the elucidation of wear mechanisms taking place in operating equipment. Example of adhesive wear, abrasive wear, corrosive wear, rolling element f...
The effect of abrasive particle size on the wear behavior of the SiC particle-reinforced aluminium composites produced by liquid metallurgy was investigated under different sizes of SiC grits at a fixed speed. The results show that the wear loss of composite was considerably lower than that of aluminium alloy. The ...
This work deals with tool wear simulation. Studying the influence of tool wear on tool life, tool substitution policy and influence on final part quality, surface integrity, cutting forces and power consumption it is important to reduce the global process costs. Adhesion, abrasion, erosion, diffusion, corrosion and fracture are some of ...
Abrasive wear of NiAl and NiAl with 10, 20, and 40 vol.% TiB2 has been investigated using particles of different types and sizes. The addition of TiB2 as a particulate reinforcement to NiAl increases the hardness of the composite with respect to NiAl, and reduces the wear rate at all volume fractions on garnet and Al2O3 ...
... Title : Development of an Abrasive Water Jet Optimum Abrasive Flow Rate Model for Titanium Alloy Cutting (Preprint). Descriptive ...
Contamination of the lube-oil with hard abrasive particles leads to a three-body abrasive wear mechanism that highly accelerates piston ring/cylinder liner wear in coal-fueled diesel engines. One approach to reducing that wear is to modify the size and or...
This bibliography contains citations concerning theoretical, experimental, and practical considerations of abrasive wear of various materials, types of surfaces, tools, machinery, equipment, etc. Wear mechanisms, wear resistance, wear rates, and wear protection are ...
The potential of this work is based on consideration of wear volume map for the evaluation of abrasive wear performance of polytetrafluoroethylene (PTFE) and PTFE composites. The fillers used in the composite are 25% bronze, 35% graphite and 17% glass fibre glass (GFR). The influence of filler materials, abrasion ...
Apr 15, 1998 ... Sojourner rover showing Lewis' wheel abrasion experiment. ... These tests created wear conditions more severe than simple rolling. ...
Austempering of ductile irons has led to a new class of irons, Austempered Ductile Irons (ADIs), with improved mechanical strength and fracture toughness lacking in gray cast irons. Laboratory wear tests have been used to evaluate the abrasive and impact-abrasive wear behavior of a suite of ADIs. The use of ...
... from federally funded research, testing and training ... for Research Development Test and Evaluation ... better than proprietary abrasion-resistant alloys ...
... from federally funded research, testing and training ... for Research Development Test and Evaluation ... the combined effects of abrasion and corrosion. ...
... Abrasives can also get into the seal interface, causing 1� rapid wear, short life, and leakage. When abrasive conditions are severe, some secondary ...
... from federally funded research, testing and training ... is caused by abrasion, interfacial adhesion ... w2a.15a, particulates, abrasions, friction, hardness ...
... from federally funded research, testing and training ... agencies for Research Development Test and Evaluation ... two body pin-on-disc abrasion tests. ...
... Developed from federally funded research, testing and training ... a review article on abrasion in multiphase ... of single-point scratch test simulation of ...
Apr 16, 1996 ... NASA Lewis Research Center's Wheel Abrasion Experiment (WAE) will measure the amount of wear on wheel surfaces of the Mars Pathfinder rover. ...
... surface treatment use, the abrasion wear should not be more than 40 percent when tested according to the Los Angeles abrasion test, (ASTM C 131 ...
... from federally funded research, testing and training ... showed some detectable abrasion by five ... WEAR RESISTANCE, TEST AND EVALUATION ...
Abrasion Tester. Background Many years before Apollo astronauts walked on ... Be sure to wear eye protection and gloves. Use a hammer to smash the rocks. ...
The development of commercially viable diesel engines that operate directly on pulverized coal-fuels will require solution to the problem of severe abrasive wear. The purpose of the work described in this report was to investigate the nature of the abrasive wear problem. Analytical studies were carried out to ...
Based on the solid-liquid two-phase mixture transportation test, the renormalization group (RNG) k-e turbulent model was utilized to simulate the solid-liquid two-phase turbulent flow in a centrifugal pump. By comparing the simulated and experimental results, inner flow features were revealed to improve the abrasion characteristic of the solid-liquid ...
High stress abrasive wear behavior of mild steel, medium carbon steel, and hardfacing alloy has been studied to ascertain the extent of improvement in the wear properties after hardfacing of steel. High stress abrasive wear tests were carried out by sliding the specimen against the ...
This report summarizes research performed on abrasion of metallic alloys. The work was designed to improve our understanding of the factors affecting abrasion rates in two-phase alloys containing large, hard second-phase particles (SPPs) such as carbides, since this class of alloys generally has very high abrasion resistance owing to ...
In this study the wear volume map is obtained and considered for evaluation of the abrasive wear performance for polyamide (PA6) and PA6 composites. Polyamide composites were tailored using 25 wt.% glass bead, 20 wt.% talc and 30 wt.% wollastonite fillers. In this work, the influence of filler materials, abrasion ...
In chemical mechanical polishing (CMP), a rigid wafer is forced on a rough, elastomeric polishing pad, while a slurry containing abrasive particles flows through the interface. The applied pressure on the wafer is carried partially by the 2-body pad-wafer contact (direct contact) and partially by the 3-body contact of pad, wafer and abrasive particles ( ...
Research in the first nine months of this project has centered in developing low-stress and gouging wear test techniques. Tests in alloy white irons have indicated that microstructure plays a strong role in establishing a materials wear resistance. Various mechanical parameters, such as fracture toughness or rolling fatigue resistance, do not correlate ...
Investigations on the wear of cotton fabrics were conducted by the U.S. Army Natick Laboratories. It was found that the theories of 'adhesive' and 'abrasive' wear, originally developed for metals, when applied to textile wear problems, provide new insight...
This article deals with the selection of materials for forming wear resistant layers within agricultural machine parts wear. We can achieve required hardness, wear resistance and life extension of agricultural machine parts and tools by the selection of a suitable material and surfacing technology.
The research program has aimed at establishing quantitative relationships between microstructural variables and abrasion resistance of highly alloyed materials including high Cr-Mo white cast irons and Co-base alloys. Low-stress abrasion resistance has be...
Oct 31, 2008 ... Abrasion of the fabric of the extravehicular activity (EVA) suits was much ... sufficiently to wear through the outer suit layer in several spots" (ref. 3). ... The fixture was adapted from a standard abrasion test (ref. ...
Effects of lubrication and humidity on the abrasiveness of a thin boron carbide coating M investigated. However, both lubrication and humidity can strongly influence the abrasive wear process. In this study, the influences of the operating environment, namely humidity and lubrication, on the coating abra
The work carried out at the University of Illinois at Chicago for the Flat-Plate Solar Array Project under contract No. 956053 is summarized. The abrasion wear rate of silicon in a number of fluid environments and the parameters that influence the surface...
New distribution functions are derived that describe the steady-state size distributions of grinding balls in mills under conditions of combined abrasive and impactive wear. Previously derived and reported size-distribution functions that are applicable u...
The abrasion resistance of fabrics may be evaluated by several laboratory instruments, but those using a grit or sand abradant have been the most reliable for predicting field wear from laboratory data. These abraders impart a wear action referred to as '...
Research has shown that during operation of a number of domestic engines a major portion of the wear is caused by abrasive particles which enter the engine by various routes: i.e. cylinder wear during operation is primarily abrasive in nature, not corrosi...
The mechanisms of material removal during abrasive wear were examined, and preliminary analyses presented. Primary emphasis has been placed on the lateral fracture mechanism, in an attempt to elucidate both its realm of importance and the concomitant mate...
... Abstract : Wear of dimethacrylate resins used as the matrix phase in dental restorative composites was characterized by two-body abrasion and ...
... ion implantation, titanium addition, tungsten addition testing and test conditions: abrasion test miscellaneous and special technical terms: wear. ...
... produce heat exchangers for shearing and bending operations. Tools were examined for abrasive wear by scanning electron microscopy after 1000 ...
Drill string hardfacings are composites of steel and tungsten carbide applied by welding techniques. This paper discusses the important variables involved and gives experimental results for casing wear and abrasive wear resistance.
Aug 3, 2009 ... The essence of this proposed activity is to develop a multi-use coating system - a highly wear resistant coating surface for use in the ...
... An abrasive wear mechanism for hard coatings on soft substrates has been suggested, and the benefits of titanium nitride coating for wear ...
This study examines the abrasive wear behavior of two iron-base hardfacing materials with different combinations of carbon and chromium after deposition on a steel substrate. Effects of applied load and sliding distance on the wear behavior of the specimens were studied. Operating material removal mechanisms also were analyzed through ...
... from federally funded research, testing and training ... An abrasion test apparatus was designed and fabricated ... perform wear and friction tests on the ...
... from federally funded research, testing and training ... and wear on a test machine which is ... Tanks (tracked vehicles), Wear, Abrasion resistance, Field ...
... of Carbide-Containing Aluminum and Titanium Alloy Surfaces,. ... carbide onto the surface of 5052 and Ti ... The wear resistance of aluminum alloys by 3 ...
This paper presents the prediction and evaluation of feed force in routing of carbon composite material. In order to extend tool life and improve quality of the machined surface, a better understanding of uncoated and coated tool behaviors is required. This work describes (1) the optimization of the geometry of multiple teeth tools minimizing the tool wear and the feed force, ...
In vitro and in situ studies modelling the wear of dental hard tissues due to erosion and abrasion are characterised by a high variation in study designs and experimental parameters. Based on a summary of the existing protocols, the present review aimed to describe and discuss the parameters which must be carefully considered in ...
... Accession Number : AD0747078. Title : The Influence of Carbon Content and Structural State on the Abrasive Wear Resistance of Iron Alloys,. ...
... Descriptors : (*CUTTING FLUIDS, *DRILLING), (*DRILLS, LUBRICATION), STEEL, AIR, WATER, FRICTION, SURFACE ACTIVE SUBSTANCES ...
... steel, and substantial cracking and spalling in higher carbon steels and in quenched and low temperature tempered medium carbon steels. ...
