Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 45 for “"abrasive wear"”.
-
Three-body abrasive wear of materials
… investigation 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 …
-
Abrasive wear testing of steels in soil
… and an evaluation has been made of the relative wear resistance of a series of ·heat treated steels. A medium carbon boron steel has been shown to have great promise as a tillage tool material because of its high wear resistance and toughness. The deformed surface layers and the mechanisms of …
-
Mechanics of abrasive wear of elastomeric materials
… often result in repeated contact with abrasive particles, which act to abrasively wear the elastomers. Elastomeric materials are observed to exhibit a characteristic form of abrasive pattern on the surface after cyclic scratching. The dimension of this pattern is closely related to the …
-
Abrasive wear with particular reference to digger teeth
Abrasive wear occurs when a contact associated with stress between a metal surface and a herd particle (frequently of mineral origin) leads to friction between the two. In a very wide range of industrial applications, abrasive wear is the main reason for component and equipment repair or …
-
The abrasive wear behaviour of mineral-filled polypropylene
… have been subjected to both mild and severe abrasive wear conditions with specific emphasis on the surface property of scratch resistance. The experimental work has covered the effect of polymer crystallinity, mineral fillers, and the nature of the abrasive counterface on the wear behaviour …
-
The abrasive wear resistance of austempered spheroidal graphite irons
A study 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 …
-
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 …
-
Modeling abrasive wear of a 3D printer extruder drive mechanism
… shafts wore down with very little use. An abrasive wear model of the extruder shafts was developed in order to determine the theoretical lifetime of the shafts given a certain material hardness. The wear rate of the shafts is proportional to the hardness of the material and the square of …
-
Micromechanics of deformation and abrasive wear of fiber-filled elastomers
The abrasive wear of unfilled and fiber-filled elastomers was studied both with experiments and with finite element simulations. Wear experiments with elastomer seals exhibited two distinct regimes: an initial, "break-in" period followed by an "aggressive wear" period. During the break-in period, …
-
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 …
-
Evaluating abrasive wear resistance of extruder tooling materials using the dry sand rubber wheel abrasion test
… steels and steel bonded carbide composites. The abrasives used were AFS 50/70 test sand and Dresser Glasgrain 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, …
-
The production and tribology of hard facing coatings for agricultural applications
… in collaboration 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 …
-
Long-term performance of pot hardware in continuous galvanizing lines
Preliminary comparative wearing tests were conducted on wearguard bearing system against CF3M (casting version of 316L steel), with tungsten carbide laser clad coating, at 30% and 50% production line tension. Tests were also conducted on Stellite 6 against Tribaloy T 400 at 50% production line …
-
Tribology in coal-fired power plants
… were evaluated in terms of their erosive and abrasive wear behaviour under different conditions, with the aim of reducing wear damage in power plants. The alumina ceramics tested ranged in composition from 90% alumina to 97% alumina content. A nitride fired and an oxide fired SiC particulate …
-
Si-DLC coatings optimized for low wear and low friction applications.
… tribological coating such as high hardness, high wear resistance and a low friction coefficient. Nanolayer systems of hydrogenated diamond-like carbon (a-C:H) and silicon doped hydrogenated diamond-like carbon (Si-DLC or a-C:H:Si) have been studied. The objectives of this work are to develop layer …
-
Defining a Model for Tool Consumption Rate on Asphalt Reclamation Machines
… shown strong correlation between placement and wear. The following study employs a screening experiment (observational study) to find significant contributors to tool wear, in applications of asphalt milling or reclamation. We have found that picks fail by two primary modes: tip breakage, and …
-
Surface Engineering and Characterization of Laser Deposited Metallic Biomaterials
… biocompatibility. In order to improve the wear resistance of the TNZT system boride reinforcements were carried out in the matrix using LENS processing. The tribological response of the metal matrix composites was studied under different conditions and compared with Ti-6Al-4V. Usage of …
-
Tibiales Malalignment bei Mobile-Bearing-Prothesen
… microscope. The polyethylene showed only abrasive wear without any fatigue effect. Tribocontact-areas of 900-1,500mm2 were observed under malalignment of mobile-bearing prostheses according to the producer’s reference. With 1-30 of malalignment tribocontact-areas were located at untypical …
-
Nanoindentation Under Dynamic Conditions
… which are thought to approximate erosive and abrasive wear mechanisms, respectively. These were utilised to investigate the wear resistance of several novel coatings formed by plasma electrolytic oxidation (PEO) of Ti-6Al4-V. Multiple impact indentation results appear to subjectively rank the …
-
The tribological and wear properties of carbon-graphite composites
… with differing properties has been evaluated for wear resistance. These include carbons with a high degree of graphitic order (natural and synthetic graphite), those with little or no such order (pitch bonded cokes, glassy carbons) and impregnated grades. Testing has been carried out using …
Page 1 of 3