Static recrystallization texture and microstructure evolution of copper-manganese alloy pre-deformed by unidirectional rolling

Abstract

Recrystallization often leads to dramatic texture changes whose underlining mechanisms remain unclear. In this study, copper-manganese alloys were subjected to unidirectional rolling and annealing. The texture of the samples was evaluated by x-ray analysis. Electron back scattering diffraction was used to investigate the local orientations and annealing twins. The origin of particular orientations of recrystallization texture were determined by comparing the macrotextures. Results showed that the 50% rolled samples were fully recrystallized after annealing at 450 °C for 1 h, and the 77% and 95% cold-rolled samples were fully recrystallized after annealing for 0.5 h. The rolling deformation and annealing time influenced the fraction ratio of twin boundaries in the recrystallized grains. After isothermal annealing, the 50% and 77% rolled samples still had strong Brass texture, whereas the 95% rolled samples mainly exhibited Cube texture and Cube-RD texture.