Strain hardening of as-extruded Mg-xZn(x=1, 2, 3 and 4 wt%) alloys

查看全文 作　　者：Chaoyue [1]Zhao;Xianhua [1,2]Chen;Fusheng [1,2]Pan;Jingfeng [1,2]Wang;Shangyu [1]Gao;Teng [1]Tu;Chunquan [1]Liu;Jiahao [3]Yao;Andrej [4]Atrens

机构地区：[1]International Joint Laboratory for Light Alloys (Ministry of Education),College of Materials Science and Engineering,Chongqing University,Chongqing, 400045,China;[2]National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing,400045,China;[3]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China;[4]School of Mechanical and Mining Engineering,The University of Queensland,St Lucia,4072,Qld,Australia

出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第1期,共9页

基　　金：financially supported by the National Key R&D Program of China(No.2016YFB0301100);the National Natural Science Foundation of China(Nos.51571043 and 51531002);the Fundamental Research Funds for the Central Universities(Nos.2018CDJDCL0019 and cqu2018CDHB1A08) 摘　　要：The influence of Zn on the strain hardening of as-extruded Mg-x Zn(x = 1, 2, 3 and 4 wt%) magnesium alloys was investigated using uniaxial tensile tests at 10^(-3)s^(-1) at room temperature. The strain hardening rate,the strain hardening exponent and the hardening capacity were obtained from true plastic stress-strain curves. There were almost no second phases in the as-extruded Mg-Zn magnesium alloys. Average grain sizes of the four as-extruded alloys were about 17.8 μm. With increasing Zn content from 1 to 4 wt%, the strain hardening rate increased from 2850 MPa to 6810 MPa at(б-б_(0.2)) = 60 MPa, the strain hardening exponent n increased from 0.160 to 0.203, and the hardening capacity, Hc increased from 1.17 to 2.34.The difference in strain hardening response of these Mg-Zn alloys might be mainly caused by weaker basal texture and more solute atoms in the α-Mg matrix with higher Zn content. 关键词：MG-ZN alloy Strain HARDENING DISLOCATION BASAL texture

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Strain hardening of as-extruded Mg-xZn(x=1, 2, 3 and 4 wt%) alloys

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