Nd对Mg-10Gd-0.5Zr合金组织和力学性能的影响  

Effects of Nd on Microstructure and Mechanical Properties of Mg-10Gd-0.5Zr Alloy

作　　者：马旭[1,2] 李全安[1,2,3] 井晓天[1] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048 [2]河南科技大学材料科学与工程学院,洛阳471023 [3]有色金属共性技术河南省协同创新中心,洛阳471023

出　　处：《材料导报》2015年第20期97-100,共4页Materials Reports

基　　金：国家自然科学基金(51171059);河南省基础与前沿技术研究计划(102300410018);河南省高校科技创新团队支持计划(2012IRTSTHN008)

摘　　要：采用XRD、OM和SEM方法,通过拉伸试验、断口分析和组织观察,研究了Mg-10Gd-（0,1,2,3,4）Nd-0.5Zr合金的显微组织和25～250℃下的力学性能,结果表明：时效态MN0合金组织由α-Mg基体和Mg5Gd相组成,Mg5Gd相主要分布在晶界处。随着Nd含量的增加,产生了新相Mg12Nd,合金晶粒细化,抗拉强度和伸长率都有显著提高,同时,随着温度的升高,合金的抗拉强度具有反常的温度效应。Microstructure and mechanical properties at 25-250℃ of aged Mg-10Gd-（0,1,2,3,4）Nd-0.5Zr alloys were investigated by means of OM,SEM,TEM and tensile tests.The results show that microstructure of the aged alloy was composed ofα-Mg matrix and Mg5 Gd phase.Mg5 Gd phase mainly distributed in the grain boundaries.With the increase of Nd content,which generated a new Mg12 Nd phase,the grain was refined,and the yield strength and elevated temperature ultimate tensile strength increased significantly.At the same time,it is found that an anomalous change of ultimate tensile strength occurred with the increasing of temperature.

关 键 词：镁合金 ND 抗拉强度 延伸率 

分 类 号：TG146.2[一般工业技术—材料科学与工程]