Twinning behavior of an extruded Mg-Gd-Y-Zn-Zr alloy sheet under tension and compression  

作　　者：Jianfen Huang Tao Chen Wugui Jiang Longhui Mao Zhiyong Chen 

机构地区：[1]Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province(Nanchang Hangkong University),Nanchang,330063,China [2]School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang,330063,China [3]School of Materials Science and Engineering,Central South University,Changsha,410083,China

出　　处：《Journal of Rare Earths》2024年第12期2208-2216,I0001,共10页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China(52304402);Jiangxi Provincial Natural Science Foundation(20232BAB214058,20224BAB214044)。

摘　　要：In this study,twinning behaviors of an extruded Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr(wt%)alloy sheet along different directions extrusion direction(ED),45°:45°to ED and transverse direction(TD)under tension and compression were investigated.The results show that:(i)the twinning frequency of the extruded alloy sheet along different directions shows obvious anisotropy under both tension and compression while demonstrating opposite orders of ED>45°>TD under tension and TD>45°>ED under compression.Such anisotropic twinning frequencies are both in accord with their average twinning Schmid factor(TSF)orders.(ii)Under both tension and compression,the twinning variants(TVs)with the highest and the second highest TSF are frequently selected with priority.However,the TV selection law under tension has a certain difference from that of compression,which should be related to the TSF distributions of ortho-TV,meta-TV and para-TV under tension and compression.

关 键 词：Magnesium alloy Texture Twinning behavior ANISOTROPY Rare earths 

分 类 号：TG146.22[一般工业技术—材料科学与工程]