Deformation behavior of copper under conditions of loading by spherically converging shock waves: High-intensity regime of loading

Methods of X-ray diffraction analysis, optical metallography, transmission electron microscopy, and microhardness measurements have been used to perform a layer-by-layer study of the structure of a 64-mm copper ball after loading by spherically converging shock waves. It has been revealed that the high-velocity plastic deformation of copper under these loading conditions is mainly realized via slip and, in the middle and deep layers, by the formation of localized-deformation bands at grain boundaries. On the macroscopic level, shear bands are observed and, on the microlevel, a homogeneous dislocation structure, microbands, microtwins, a banded structure, and dislocation vacancy loops arise.