Effects of caliber rolling on microstructure and room temperature tensile properties of Mg–3Al–1Zn alloy

AbstractMg–3Al–1Zn (AZ31) alloy was caliber rolled isothermally in the temperature range of 250–450 °C to develop fine grains of 3.6–12.5 μm. The stress–strain curves obtained from tensile tests at room temperature were found to vary with the temperature employed in caliber rolling. Maximum tensile strength of 290 MPa and ductility of 13.5% were obtained upon caliber rolling at 300 °C as compared to 188 MPa and 15.2%, respectively, in the mill-rolled condition. The variations in tensile properties are explained by the concomitant grain size, texture and twins obtained as a function of caliber rolling temperature