Deformation microstructures and texture evolution of the Mg–Zn–Mn alloy with high strain rate rolling

The effect of strain rates (έ) on the microstructure, texture, and mechanical properties of the Mg–5Zn–0.6Mn alloys during high strain rate rolling at 300 °C are studied. Increasing έ promotes dynamic recrystallization (DRX). The DRX grain grows from 1.0 to 3.4 μm, and the DRX volume fraction increases from 76 to 93% with έ rising from 10 to 25 s –1 . The maximum intensity values of basal texture decrease from 2.74 to 2.09 with increasing έ. The texture weakening is mainly attributed to the increase in DRX volume fraction and the number of tensile twins. The alloy sheets rolled at 10 s –1 possess optimal comprehensive mechanical properties (the tensile strength of 321 MPa, yield strength of 240 MPa, and elongation of 24.9%), attributing to the smallest DRX grain size, and the largest geometrically necessary dislocations density and precipitation density. Graphical abstract