Zr添加对含LPSO相Mg-Y-Zn合金组织和力学性能的影响  

Effect of Zr Addition on Microstructure and Mechanical Properties of MgY-Zn Alloy with Long Period Stacking Ordered Phase

作　　者：刘俊英[1] 黄浩 LIU Jun-ying;HUANG Hao(College of Mechanical and Electrical Engineering,Heyuan Polytechnic,Heyuan 517000,Guangdong,China;School of Aeronautical Manufacture Engineering,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China)

机构地区：[1]河源职业技术学院机电工程学院,广东河源517000 [2]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《铸造》2020年第1期46-50,共5页Foundry

基　　金：国家自然科学基金(51401102)。

摘　　要：研究了Zr添加对含LPSO相的Mg97Y2Zn1合金凝固组织和力学性能的影响。研究结果表明,添加Zr能够显著细化合金中的初生α-Mg相;随着Zr含量的增加,第二相的体积分数逐渐增加,其分布也变得越来越均匀,而且合金的抗拉强度和伸长率也迅速提升,但Zr含量超过0.6wt.%后,性能提升变得不再明显。考虑到成本因素,Zr的最佳含量为0.6wt.%,此时,合金的抗拉强度和伸长率分别为168 MPa和6.4%,与未合金化的合金相比提高了27.3%和77.8%。The effect of Zr addition on the microstructure and mechanical properties of Mg97Y2Zn1 alloy with long period stacking ordered(LPSO) phase was investigated. The results show that Zr addition could significantly refine primary α-Mg phase in the microstructure of alloy, increase the volume fraction of secondary phases in matrix, and make the secondary phases distribution more uniform. Moreover, with increasing Zr content up to 0.6 wt.%, the tensile strength and elongation of Mg97Y2Zn1 alloy were rapidly enhanced. However, further addition only resulted in negligible enhancement. Therefore, optimal Zr addition was about 0.6 wt.%, with an increase in the tensile strength and elongation by 27.3% and 77.8%, respectively, as compared with the Mg97Y2Zn1 alloy.

关 键 词：Zr添加 Mg97Y2Zn1合金 组织 力学性能 

分 类 号：TG146.2+2[一般工业技术—材料科学与工程]