3D MODELING OF THE DEFORMATION DEFECTS DISTRIBUTION IN THE VOLUME OF FCC SINGLE CRYSTAL METALS

10.25712/ASTU.1811-1416.2024.02.002

Abstract

The paper presents the results of 3D modeling of the distribution and accumulation of dislocations and low-angle boundaries in the volume of a metal FCC single crystal during deformation by uniaxial compression. Calculations were performed using a model for the synthesis of dislocation kinetics and mechanics of a deformable solid for the cases of deformation without and with account of the end faces friction forces. Pictures of the distribution of the intensity of plastic deformations, the density of dislocations, and the density of low-angle boundaries in the plane of the central longitudinal section of deformed rectangular sample are presented. Three regions of the deformable volume with the different accumulation of deformation defects are identified in the presence of the end faces friction forces: the end face of the crystal, sections of the crystal adjacent to the free surface, and the central part. A statistical assessment of the degree of homogeneity of the distribution of deformation defects in the deformed volume was carried out.