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A mechanism of metallic wear is proposed in which laminar wear debris is generated by a process of plastic ratchetting brought about by repeated pummelling of the softer wearing surface by the asperities on a harder mating surface. Wear rate is found to be approximately proportional to (load) and an increasing function of a single non-dimensional parameter termed the plasticity index for repeated...
Most work on the strength of coated surfaces has assumed that there are no residual stresses and that the load is applied only once. Both these assumptions are incorrect. The manufacturing process itself may develop large residual stresses in the surface and repeated sliding causes the load to be applied many times, leading to the development of residual stresses. These residual stresses are protective...
This study is aimed at the deterioration of rolling contact fatigue (RCF) life of pearlitic rail steel, under rolling-sliding conditions, where the wet phase of the test is preceded by different numbers of dry cycles. It is shown that initial dry cycles above a critical number causes sudden and significant deterioration in RCF life. This effect has been explained using the argument of plastic strain...
Most work on the mechanics of shakedown has been on half-spaces which have strength properties invariant with depth. In practice, however, materials for tribological applications are often surface engineered to impart a higher hardness near the surface. In some situations, such as wheels on railway tracks, considerable plastic flow is observed near the surface and, as a result, the initial hardness...
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