Xiao Hongchao, Yang Zhengjiang, Li Jie, Wan Yingchun
School of Metallurgy and Environment, Central South University, Changsha 410083, China.
School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Materials (Basel). 2021 Apr 20;14(8):2067. doi: 10.3390/ma14082067.
Mg-Gd-Y-Zr alloy was subjected to torsion of various strain levels at room temperature. Obvious traces of basal slip were observed in the twisted alloy. Dislocations of <c+a> were also observed, but there were no signs of significant sliding. Even in the sample whose equivalent strain became 0.294, 101¯0 twinning and 101¯2 twinning were rarely seen. The deformation mode with predominant basal dislocations and subordinate <c+a> dislocations resulted in a modified Y fiber texture with a basal pole slightly dispersed at about 70° from the twist axis. Mechanical tests revealed that the tensile strength and compressive strengths increased simultaneously after twisting.
在室温下，对Mg-Gd-Y-Zr合金施加不同应变水平的扭转。在扭转后的合金中观察到明显的基面滑移痕迹。也观察到了<c+a>位错，但没有明显的滑移迹象。即使在等效应变达到0.294的样品中，101¯0孪晶和101¯2孪晶也很少见。以基面位错为主、<c+a>位错为辅的变形模式导致了一种改进的Y纤维织构，其基面极从扭转轴分散约70°。力学测试表明，扭转后拉伸强度和抗压强度同时增加。
