Deformation of sintered copper and 50Cu–50Fe mixture to large strains by cyclic extrusion and compression

Abstract

Sintered compacts of copper and a 50Cu–50Fe mixture have been plastically deformed to large strains (total strain ɛ_t=13·8) by cyclic extrusion and compression. The hardness changes after deformation indicate that no further work hardening occurs with either material when ɛ_t>4·6. With copper, strain accommodation at large strains would appear to occur solely by dynamic recovery and recrystallisation. With the Cu–Fe mixture, shear banding is still found at the highest strains used.

MST/1609