Influence of the Initial State of Cu–0.6Cr–0.1Zr Alloy on Changes in Structure and Properties during High-Pressure Torsion

Abstract

In this work, the dependence of the change in structural characteristics and physical and mechanical properties of the Cu–0.6Cr–0.1Zr (wt %) alloy under high-pressure torsion (HPT) on the structural characteristics of the initial state—after quenching with a supersaturated solid solution and after aging with an ensemble of large micron-sized particles and a low concentration of the solid solution—was established. It is shown that, in the case of a quenched state with a supersaturated solid solution, changes in the physical and mechanical properties during the HPT process occur at the first stages of deformation (1–2 revolutions) and subsequently the values of properties stabilize. In the case of the initial state with an extremely low concentration of the solid solution and an ensemble of large particles, a nonmonotonic change in the physical and mechanical properties of the Cu–0.6Cr–0.1Zr alloy is observed, which is closely related to the initial shape, size, and distribution of particles in the material matrix.