Texture and grain boundary character distribution during equal channel angular extrusion of some two-phase copper alloys

Abstract

In the present work, a thorough investigation of evolution of microstructure and texture has been carried out to elucidate the evolution of texture and grain boundary character distribution (GBCD) during Equal Channel Angular Extrusion (ECAE) of some model two-phase materials, namely Cu-0.3 Cr and Cu-40 Zn. Texture of Cu-0.3 Cr alloy is similar to that reported for pure copper. On the other hand, in Cu-40 Zn alloy, texture evolution in α and β (B2) phases are interdependent. In Cu-0.3Cr alloy, there is a considerable decreases in volume fraction of low angle boundaries (LAGBs), only a slight increase in CSL boundaries, but increase in high angle grain boundaries (HAGBs) from 1 pass to 4 passes for both the routes. In the case of Cu-40 Zn alloy, there is an appreciable increase in CSL volume fraction.