Interpretation of the temperature dependence of the composition distribution in nanostructured alloys under severe plastic deformation

Abstract

In the work, we analyze experimental data on the temperature dependence of the composition distribution in alloys under severe plastic deformation. The analysis is based on a simple model that combines the concepts of relay-race evolution of ajunction disclination network and structural-kinetic description of brittle fracture in view of quasi-hydrostatic compression. Conditions for a stable homogeneous steady-state plastic flow are considered and temperature-rate modes of plastic flow are determined in the context of deformation controlled by grain boundary diffusion or vacancy diffusion in the grain volume. © 2010