Substructures in Destructed Samples of Polycrystalline Cu–Mn Solid Solutions

Abstract

The TEM method was used to study dislocation substructures and their change at developed plastic deformation of fcc alloys upon departure from the site of destruction. Polycrystalline Cu–Mn alloys with grain sizes of 10, 100, and 240 μm were the materials of study. The parameters characterizing dislocation substructures were measured, and the patterns of their change depending on the distance from the site of destruction were determined. The influence of grain size on the change in these patterns is revealed. It is established that, near the site of destruction of samples, the highest density of disordered boundaries and curvature–torsion of the crystal lattice are observed.