Microstructure and mechanical properties of cast Mg-15Al-xNd alloy by permanent mold

作     者：Zhou Kangkang Wang Hongxia Liang Wei Zhang Jinshan Zhang Hongxia 

作者机构：College of Materials Science and Engineering Taiyuan University of Technology Key Laboratory of Interface Science and Engineering in Advanced Materials 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2013年第10卷第5期

页      面：315-320页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51175363,51175364 and 51274149) the Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi Province(2013) the Fund for the Doctoral Program of Higher Education of China(No.20111402110004) 

主　　题：Mg-15Al magnesium alloy microstructure mechanical properties 

摘      要：To improve the comprehensive mechanical properties of Mg-15Al magnesium alloy,different amounts(from 0 to 4.0wt.%)of Nd were added to the alloy and six Mg-15Al-xNd alloys were prepared by metal mould *** effect of Nd content on microstructure of the alloys was investigated by means of OM,SEM,EDS,TEM,and *** tensile properties were tested at room temperature(RT)and high temperature(473 K).The results indicate that the primaryα-Mg dendrite is significantly refined with the addition of *** best refinement is reached at 1.0wt.%Nd content and the average dendrite arm spacing decreases from 80-100μm(without Nd addition)to^20μm.A further increase in Nd content leads to the coarsening of the primaryα-Mg *** addition of Nd improves the tensile properties of Mg-15Al both at RT and 473 *** Mg-15Al alloy containing 1.0wt.%Nd exhibits the best tensile *** with the alloy without Nd,the yield and ultimate tensile strength of the Mg-15Al-1.0Nd alloy at RT increase from 132.3 to 148.6 MPa and 152.3 to 189.6MPa,increase by 12.3%and 24.5%,respectively;and the elongation at RT increases from 0.05%to 1.24%.The yield and tensile strength of the alloy at 473 K increase from 97.9 to 115.3 MPa and 121.6 to 140.1 MPa,increase by 15.2%and 20%,*** increment of Nd content to 1.5wt.%degrades the tensile properties,which is ascribed to grain coarsening and growth of the Al-Nd phase.