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 mechanicalproperties of the Cu-0.6Cr-0.1Zr (wt.%) alloy under high-pressure torsion (HPT) on the structuralcharacteristics of the initial state – after quenching with a supersaturated solid solution and afteraging with an ensemble of large micron-sized particles and a low concentration of the solidsolution – was established. It is shown that in the case of a quenched state with a supersaturatedsolid solution, changes in the physical and mechanical properties during the HPT process occur atthe first stages of deformation (1–2 turns) and subsequently the property values stabilize. In the caseof the initial state with an extremely low concentration of the solid solution and an ensemble of largeparticles, a non-monotonic change in the physical and mechanical properties of the Cu-0.6Cr-0.1Zralloy is observed, which is closely related to the initial shape, size and distribution of particles in thematerial matrix.