Y对Mg-10Gd-xY-1Zn-0.5Zr(x=1,2)镁合金铸态显微组织和力学性能的影响  

Effect of Y on As⁃cast Microstructure and Mechanical Properties of Mg⁃10Gd⁃xY⁃1Zn⁃0.5Zr(x=1,2)Magnesium Alloy

作　　者：胡捷 程仁菊 李上民 谭磊 李春雨 刘运 宋洁 杨明波[1] HU Jie;CHENG Renju;LI Shangmin;TAN Lei;LI Chunyu;LIU Yun;SONG Jie;YANG Mingbo(Materials Science and Engineering College,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《材料导报》2021年第S02期456-459,共4页Materials Reports

基　　金：重庆市技术创新与应用发展专项(cstc2020jscx-msxmX0215,cstc2019jscx-mbdxX0031);微纳米材料工程与技术重庆市高校重点实验室开放基金资助项目(KFJJ2003)。

摘　　要：本实验研究了Y元素含量对Mg-10Gd-xY-1Zn-0.5Zr(x=1,2)镁合金铸态显微组织和力学性能的影响。结果表明:Mg-10Gd-xY-1Zn-0.5Zr(x=1,2)镁合金的显微组织均由α-Mg、Mg_(12)(Gd,Y)Zn、Mg_(5)(Gd,Y,Zn)和Mg_(24)(Y,Gd,Zn)_(5)这四种相组成,当Y的含量由1%提升至2%时,Mg_(12)(Gd,Y)Zn、Mg_(5)(Gd,Y,Zn)以及LPSO等第二相的数量均有所减少,而Mg_(24)(Y,Gd,Zn)_(5)相的数量有所增多;随着Y元素含量的增加,合金的室温力学性能明显提高,当Y含量为2%时,铸态的抗拉强度、屈服强度以及延伸率分别为237 MPa、189 MPa和4.6%,相比Y含量为1%的铸态有明显提升,说明Y在改善镁合金综合性能上有明显优势。The effect of Y Content on as cast microstructure and mechanical properties of Mg⁃10Gd⁃xY⁃1Zn⁃0.5Zr(x=1,2)magnesium alloy was studied.The results show that the microstructure of Mg⁃10Gd⁃xY⁃1Zn⁃0.5Zr(x=1,2)magnesium alloy is composed ofα⁃Mg,Mg_(12)(Gd,Y)Zn,Mg_(5)⁃(Gd,Y,Zn)and Mg_(24)(Y,Gd,Zn)_(5)phases.When the content of Y increases from 1%to 2%,the content of second phases such as Mg_(12)(Gd,Y)Zn and Mg_(5)(Gd,Y,Zn)decreases,while the Mg_(24)(Y,Gd,Zn)_(5)phases increases.With the increase of Y content,the mechanical pro⁃perties of the alloy at room temperature are obviously improved.When the Y content is 2%,the as⁃cast tensile strength,yield strength and elongation are 237 MPa,189 MPa and 4.6%respectively,which are significantly improved compared with 1%,indicating that Y has obvious advantages in improving the comprehensive properties of magnesium alloy.

关 键 词：Y 铸态 镁合金 显微组织 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]