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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"wear resistance"”.
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Relative Wear Resistance of Soil-Aggregate Mixtures
Made available in DSpace on 2014-12-05T17:37:33Z (GMT). No. of bitstreams: 1 6206207.pdf: 3232108 bytes, checksum: 5972c31b874642910bc8f65d059e7934 (MD5) Previous issue date: 1962
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The abrasive wear resistance of austempered spheroidal graphite irons
… has been made of the structure and abrasive wear resistance of two austempered commercial spheroidal cast irons. Heat treatments have been carried out for different times between 2 and 120 minutes for a range of austenitising temperatures between 850°C and 950°C and austempering temperatures …
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The development of abrasive-corrosive wear resistance of steels by microstructural control
… alloyed steels with improved abrasive-corrosive wear resistant properties has been evaluated. The synergistic effect of abrasion and corrosion in the accelerated wear of steels is examined and the main parameters identified. A model of the process is proposed. The model is used to develop the …
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The Effect of Ion Implantation on the Corrosive-Wear Resistance of Ti-6A1-4V.
… Many surgical implant devices are subjected to wear and fretting processes which generate wear debris and corrosion products. Large volumes of corrosion products or wear debris can elicit a tissue response and may have a systemic effect in the body after a long period of exposure. These problems …
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Effect of fullerene containing lubricants on wear resistance of machine components in boundary lubrication
… the effect of fullerene containing lubricants on wear resistance of steel-bronze couples operating under boundary lubrication conditions. A mathematical model of deformed asperity contact was built to calculate real contact area and real contact pressure. Computer controlled wear friction testing …
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A Comparison of the Wear Resistance of Normal, Degenerate, and Repaired Human Articular Cartilage
… of arthritis, osteoarthritis, is caused by the "wear and tear" of articular cartilage on the surface of bones in synovial joints. It is a chronic problem that is slowed with different types of therapies, including pharmaceutical, nutritional and surgical, but to date the wearing down of the …
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Abrasive wear resistance of ruthenium aluminide intermetallic and ferritic steels containing a sigma intermetallic phase
The abrasive wear resistance of ruthenium aluminide intermetallic and ferritic steel containing an iron-chrome sigma intermetallic phase have been investigated in this study. A medium carbon wear resistant steel (MCV) was used in the study to facilitate comparison between wear resistances in the …
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Evaluating abrasive wear resistance of extruder tooling materials using the dry sand rubber wheel abrasion test
… crushed fused silica. Evaluation of test wear scars and wear debris from the tests using AFS 50/70 showed that delamination was the primary wear mechanism for the composite materials, with some ploughing and microcutting, while ploughing and microcutting were the primary mechanisms in the …
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Design and characterization of diamond-like carbon coated kinematic contacts for improved coupling precision and wear resistance
Kinematic couplings are used to precisely locate components by constraining all 6 degrees of freedom. The repeatability of kinematic couplings range from hundreds-of-microns down to tens-of-nanometers. This paper introduces diamond-like carbon (DLC) coatings as a means to improve the repeatability …
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The impact of coating architecture on the hardness, friction and wear resistance of hard and tribological nanocomposite coatings
… surface coatings such as hardness, friction, and wear resistance in a particular environment are influenced by the characteristics of the coating microstructure which include density, grain size, grain boundary chemistry, porosity, and grain orientation.</p><p>In this research effort bias sputter …
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Corrosion And Wear Resistance Of Titanium- And Aluminum- Based Metal Matrix Composites Fabricated By Direct Metal Laser Deposition
… also analyzed for each composite. The corrosion resistance of the MMCs were compared by monitoring open circuit potential (OCP), polarization resistance (Rp) and potentiodynamic polarization in 0.5 M NaCl to simulate exposure to seawater. The Ti-MMCs demonstrated improvements in hardness between …
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The effect of steam treatment and precipitation hardening on the mechanical properties and wear resistance of sintered iron and iron-copper alloys
… with increased compressive strength, hardness, resistance to wear and corrosion. The aims of the present investigation were: (a) to examine the influence of copper content and process variables on the response of sintered iron to steam treatment. (b) to explore the possibility of combining steam …
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The influence of steel microstructure on abrasive wear in soils
… been made to correlate the ranking order for the wear resistance of similar treated steels in field and laboratory tests. It has been established that wear resistance is a function of soil constitution, steel carbide morphology and hardness. Explanations have been advanced for the differences in …
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The production and tribology of hard facing coatings for agricultural applications
… with Chapmans Agricultural Ltd. Abrasive wear is a significant issue in many industries but is of particular significance in agriculture. This research is being carried out due to the demand for a hard wearing, economical coating for use in the agricultural industry. A primary objective …
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Tribological Investigation of Nickel Titanium Shape Memory Alloy (NiTi SMA) Coatings
… is still limited due to its low hardness and low wear resistance properties. In this study, the aim is to design a NiTi SMA coating structure with excellent mechanical properties and high wear resistance for tribological applications. The approach was undertaken by considering the potential of the …
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On developing a graphitic white iron for metal-to-metal wear systems
… heat dissipation issues related to the adhesive wear observed in metal-to-metal wear systems, by developing a graphitic white iron to increase thermal diffusivity of the wear components. One of the premium materials commonly used in current metal-to-metal wear systems is Fe15Mo18Cr and field …
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Tribological Behaviours Influenced by Surface Coatings and Morphology
… metal components due to their high hardness, wear resistance, corrosion resistance and low friction coefficient. In this work, PEO process was used to produce a relatively thick (~20 μm) coating on A356 Al alloy for improving the wear resistance and tribological properties of the Al alloy. …
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Three-body abrasive wear of materials
… into the phenomenon of three-body abrasive wear. A specially designed three body abrasive wear apparatus has been built, modified and evaluated as part of this overall study. Further, a series of commercially available candidate materials has been evaluated for wear resistance using silica …
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