Dislocation structure evolution in low-stability deformed Cu–Mn alloys

Abstract

The paper presents research results of the evolution of dislocation structures in low-stability Cu–Mn alloys deformed at different temperatures. The dislocation structure evolution in these alloys indicates to an important process during a transfer from one deformation stage to another. Each stage is characterized by its own strain carrier in the form of the specific dislocation structure with the highest volume fraction at the given stage. The strain carrier from the preceded stage gradually dissapears at the given stage with increasing deformation, and the strain carrier from the successive stage appears. Thus, in a certain strain range, there are strain carriers from the preceded stage, given stage, and successive stage. It is supposed that the formation of the cellular structure corresponds to the kinetic diffuse first-order phase transition to the dislocation structure.