Enhanced stretch formability of Mg–Al–Zn alloy sheets rolled at high temperature (723 K)

The texture and stretch formability of Mg–3.0 wt.% Al–1.0 wt.% Zn–0.5 wt.% Mn alloy sheets rolled at 663 and 723 K were investigated at room temperature. The specimen rolled at 723 K exhibited weaker basal texture intensity than the specimen rolled at 663 K, and this contributed to an enhancement of thickness-direction strain under biaxial tension stress for the former, resulting in an enhanced stretch formability. The origin of weaker basal texture intensity for the specimen rolled at 723 K is discussed.