摘要
This study aims to understand the features of{11■1}twin boundaries in a high strain rate compressed Mg-10 Gd-3Y-0.4Zr using electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM).Based on the Schmid factor calculations,the basal dislocations are easily activated within the{11■1}twin and suppressed in the surrounding matrix.The consequent basal dislocation-twin interaction during deformation can lead to the misorentiation deviation of{11■1}twin boundaries,accompanying with the formation of a step at the twin boundary.Such a{11■1}twin boundary evolution mechanism provides a new vision of twinning behavior in Mg alloys.
基金
This work was financially supported by National Natural Science Foundation of China(No.51701121,No.51825101,No.51631006)
Shanghai Sailing Program(No.17YF1408800)
Science and Technology Commission of Shanghai Municipality(No.18511109302)
Qinghai Provincial Science and Technology Key Program(No.2018-GX-A1)
Startup Fund for Youngman Research at SJTU(No.18×100040022)。
