Abstract
Optical and scanning microscopy together with monitoring the electron work function are used to study the fatigue fracture kinetics of the surface layers of materials in relation to phase composition under severe friction conditions. It is established that periodic variations in the electron work function for rubbing surfaces during fatigue fracture are monoharmonic for homogeneous single-phase materials and polyharmonic for heterogeneous multiphase materials. Depending on the metal-physical features of the materials, additional harmonics may emerge caused by secondary phase inclusions in the spectra for periodic changes in electron work function for rubbing surfaces.
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