Оценка вкладов различных механизмов в сопротивление деформированию монокристаллов сплава Cu–12 ат.% Al

Abstract

The evolution of the structure in the process of plastic deformation by compression of Cu – 12 at.% Al single crystals is investigated. Data on the stress-strain curve, deformation stages and the relationship of stages with the types of forming substructures are presented. Quantitative measurements of various parameters characterizing the substructures were carried out. The results are presented in the form of a diagram of the dependence of the fraction of substructures on the density of dislocations. Dependences of the distances between non-reactive intersections of dislocations, inter-dislocation reactions, obstacles of different types, and dislocation lines on the degree of strain are shown. Particular attention is paid to the quantitative assessment of the contributions to the flow stress from local obstacles and long-range elastic stress fields, as well as the contributions to strain associated with the development of slip and twinning.