Multiple-twinning induced recrystallization and texture optimization in a differential-temperature-rolled AZ31B magnesium alloy with excellent ductility
Ruizhi Peng, Chun Xu, Yu Li, Shaoxiong Zhong, Xiang Cao, Yafei Ding
Abstract
The effect of differential roller temperature (DTR) (low and high roller temperature difference: 60 and 180 K) on the microstructure evolution, deformation mechanism, and mechanical properties were investigated in a commercial AZ31B alloy sheet. Compared with the LDTR sample, a considerable shear strain (0.4) in the HDTR sample led to a multiple-twinning system, especially the formation of contraction twins (CTWs) and double twins (DTWs). After annealing, the HDTR-annealing (HDTR-A) sample achieved an excellent ductility (∼33.6%) as a result of a higher recrystallization fraction (∼71.75%) and more optimized texture component (max basal texture intensity decrease from 36.13–8.06).