KINETICS OF ACCUMULATION OF SCATTERED DAMAGE IN POLYCRYSTALLINE MATERIALS WITH VARIOUS GRAIN SIZES UNDER SMALL-SCALE STRAIN CONDITIONS

摘要

The paper addresses damage accumulation processes that occur during static deformation in steels 45 and 09G2S and in brass L63 in the initial state and upon “grain annealing.” The authors discuss new experimental evidence on the damage accumulation kinetics during deformation of polycrystalline materials that differ in nature and grain size, including materials in the unloaded state and those under stresses, with small and very small strains (0.05–0.15%). The results obtained have been the necessary physically consistent explanations. Analytical approximations of the correlation between the main mechanical properties of materials (hardness, yield stress, and ultimate strength) and their structure parameters (grain size) are given.