ENTROPY-BASED METHOD FOR ASSESSING THE DESTRUCTION OF SURFACE LAYERS OF MATERIALS UNDER FRICTIONAL INTERACTION
Abstract
The process of frictional interaction is characterized by intense plastic deformation of the surface layers that precedes their destruction. This plastic deformation occurs within a thin surface layer and is accompanied by extremely high rates of deformation and diffusion-several orders of magnitude higher than those observed during bulk deformation. Due to the repeated interaction of asperities on the actual contact spots of the rubbing surfaces, the absorbed mechanical energy is relatively uniformly distributed over the surface. Typically, during friction, two bodies remain in contact and move relative to each other. This process is generally accompanied by physico-chemical interactions with the surrounding environment. To simplify the model of friction and wear, this study considers the destruction of surface layers caused by fixed abrasive particles, where the process is not complicated by external physico-chemical interactions. Under such conditions, the surface layers enter a highly nonequilibrium state, forming a so-called “third body,” whose structure and properties differ significantly from those of the original material.
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References
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