CXXX. On the linear work hardening mate of face-centred cubic single crystals

Abstract

Summary The linear strain hardening observed after the easy glide region in face-centred cubic single crystals at sufficiently low temperature is explained by assuming that all the Frank-Read sources of the active slip system are in action, and form small active slip planes bounded on all four sides by Cottrell barriers. The initial easy glide region should occur before all the barriers are formed; the parabolic strain hardening appearing in the final stages would be related to a thermally activated breaking of the piled-up dislocations through the Cottrell barriers.