Feasibility of high strain-rate rolling of a magnesium alloy across a wide temperature range

摘要

High strain-rate rolling (HSRR) was successfully used to produce Mg-6.0 Zn-0.5 Zr sheets at "250-400 °C. All the sheets have ultrafine-grained structures and exhibit excellent strength and ductility. Extensive deformation twinning, production of high-density dislocations in twins, subsequent continuous dynamic recrystallization (DRX) and discontinuous DRX contribute to the feasibility of HSRR and to the ultrafine-grained structures. The excellent mechanical properties are ascribed to the ultrafine grains, low dislocation density and weakened basal texture in the final structure.