Electron microscopic studies in the yield region of 70/30-α-brass single crystals—I. The mode of slip

Abstract

From extensive EM observations and measurements of slip line structure and TEM of dislocation structure during Lüders band slip of quenched and annealed 70/30-α-brass single crystals details of the microscopic mode of slip are inferred. Primary dislocations propagate as large extended groups on single slip planes over slip zones of several 100 μm dia., on their way frequently interacting elastically with neighbouring groups and eventually being blocked by forming extended multipoles. Though cross slip processes are not numerous they appear to provide the main mechanisms for activating new slip planes by “micro” and “macro” cross slip during propagation of the Lüders band.