文献类型：期刊文献

英文题名：Role of Y on the microstructure and mechanical properties of Mg-Gd-Zr alloy

作者：Lei, Bin[1];Wang, Cuihong[1];Jiang, Bin[1,2,3];Bai, Shengwen[1,2,3];Dong, Zhihua[1,2,3,6];Qian, Xiaoying[1];He, Chao[1];Xu, Junyao[1];Yang, Huabao[4];Wang, Qinghang[5];Pan, Fusheng[1,2,3]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;[2]Chongqing Univ, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;[3]Chongqing Inst Adv Light Met, Chongqing 400030, Peoples R China;[4]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China;[5]Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Peoples R China;[6]Sha Zheng St 174, Chongqing, Peoples R China

年份：2022

卷号：861

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：SCI-EXPANDED(收录号：WOS:000893304600001)、、EI(收录号：20224813199175)、Scopus(收录号：2-s2.0-85142881671)、WOS

基金：The authors are grateful to the National Natural Science Foundation of China (U2037601, U21A2048, 52101126, 52101124, 52001037 and 51971044) , the Chongqing Science and Technology Commission (cstc2017zdcy-zdzxX0006, cstc2019jscx-mbdxX0031) , the Chongqing Scientific & Technological Talents Program (KJXX2017002) , the China Postdoctoral Science Foundation (2021M700566) , and the Qinghai Science and Technology Program (2018-GX-A1) . The authors also gratefully acknowledge the access to the facilities of the Electron Mi- croscopy Center and Analytical and Testing Center in Chongqing University.

语种：英文

外文关键词：Mg alloy; Y content; High ductility; Nanoscale phase

外文摘要：The influence of Y on the microstructure and mechanical properties of Mg-4Gd-0.5Zr alloy is investigated. The results show that by increasing the Y content from 0 to 1.2 wt%, the grain size gradually reduces in both as-cast and as-extruded state, whilst the maximum texture intensity noticeably decreases. In addition, nanoscale par-ticles of Mg24(Gd, Y)5 phase start to precipitate at relatively high Y content. The designed Mg-4Gd-0.5Zr-xY (x = 0, 0.5, 0.8 and 1.2 wt%) alloys exhibit exceptional ductility and moderate strength. As increasing Y content from 0 to 1.2 wt%, the elongation of Mg-4Gd-0.5Zr-based alloy decreases slightly from 44.6% to 39.0% along the extrusion direction, while the yield strength substantially increases from 87.9 to 134.1 MPa. The main strengthening mechanisms are demonstrated to be solid solution strengthening in combination with the grain refinement. Furthermore, the exceptional ductility maintained in Y-containing alloys is found to closely correlate with the activation of pyramidal slip.