Microstructure Evolution of ZK60M Twin-Roll-Casted Magnesium Alloy during Hot Compression and Annealing

The effects of hot compression deformation (300°C/0.1s-1) and annealing on the microstructural evolution of ZK60+0.8Zn (ZK60M) alloys were investigated in the present works. Lots of sub-structures were studded in the shear bands under the deformed conditions, and after annealing, the sub-structures in the shear bands occurred static recrystallization following by the growth of recrystallized grains. With the increase of annealing temperature, amounts of twins decrease while static recrystallization (SRX) grains increase while dislocations rearrange forming sub-grains ultimately induced static recrystallization. And that, the micro structural evolution and grain boundary distribution of the specimen as-deformed and as-annealed at different temperatures were analyzed by electron back scatter diffraction (EBSD) data.