The effect of strain path on the mechanical behavior and dislocation arrangements in the hot working of copper

Hot monotonic torsion of copper at 673 K led to a stress–strain curve displaying a peak and steady state stress typically connected to dynamic recrystallization (DRX). Cyclic deformation suppressed DRX, and restoration was dominated by Dynamic Recovery (DRV). Successive straining cycles involved the breakdown and restructuring of dislocation arrangements typical of DRV, causing a decrease in accumulated internal energy. These phenomena are similar to those caused by strain path changes under cold working conditions.