文献类型：期刊文献

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

作者：Lei, Bin[1];Dong, Zhihua[1];Yang, Yan[1,2];Jiang, Bin[1,2];Yuan, Ming[1,5];Yang, Huabao[3];Wang, Qinghang[4];Huang, Guangsheng[1,2];Song, Jiangfeng[1,2];Zhang, Dingfei[1,2];Pan, Fusheng[1,2]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;[2]Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;[3]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China;[4]Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Jiangsu, Peoples R China;[5]Hubei Engn Univ, Sch Chem & Mat Sci, Xiaogan 432000, Peoples R China

年份：2022

卷号：843

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

收录：SCI-EXPANDED(收录号：WOS:000814325300001)、、EI(收录号：20221812066909)、Scopus(收录号：2-s2.0-85129302995)、WOS

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

语种：英文

外文关键词：Mg-Gd-Zr alloy; Zn alloying; Microstructure; Orientation relationship

外文摘要：Here, the microstructure and mechanical properties are investigated for the designed Mg-4Gd-0.5Zr-xZn (x = 0, 0.2, 0.5, 1.0 and 1.5 wt%) alloys with special emphasis on the effect of Zn. The results show that the designed Mg-4Gd-0.5Zr-xZn alloys exhibit the exceptional ductility. Among them, the Mg-4Gd-0.5Zr-1.0Zn and Mg-4Gd0.5Zr-1.5Zn alloys show the elongation to fracture as high as 35.2% and 32.5%. Furthermore, a good strengthductility balance is achieved in the alloys, which is basically ascribed to the grain refinement, texture softening and the precipitation of Zn-containing second phases. As Zn content increases from 0 to 1.5 wt%, the grain sizes of the extruded Mg-Gd-Zr-Zn alloys decrease from 6.02 to 3.05 um, while the maximum texture intensity decreases from 11.13 to 5.24 m.r.d. Moreover, the Zn2Zr3 and Mg3Zn3Gd2 precipitates, which exhibit the completely coherent and semi-coherent orientation relationship with Mg matrix, are induced by the addition of Zn. These coherent and semi-coherent precipitates lead to noticeable strengthening effect and are not easy to become the source of crack, contributing to the high ductility in Mg-4Gd-0.5Zr-1.0Zn and Mg-4Gd-0.5Zr-1.5Zn.