Homogenization heat treatment of Mg-7.0 wt%Y-1.0 wt%Nd-0.5 wt%Zr alloy

作     者：Jing-Bao Liu Kui Zhang Jing-Tao Han Xing-Gang Li Yong-Jun Li Ming-Long Ma Jia-Wei Yuan Meng Li Jing-Bao Liu;Kui Zhang;Jing-Tao Han;Xing-Gang Li;Yong-Jun Li;Ming-Long Ma;Jia-Wei Yuan;Meng Li

作者机构：State Key Laboratory for Fabrication and Processing of Nonferrous MetalsBeijing General Research Institute for Nonferrous MetalsBeijing 100088 China School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2020年第39卷第10期

页      面：1196-1201页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Basic Research Program of China(No.2013CB632202) 

主　　题：Rare earth magnesium alloy Homogenization Microstructure Hardness 

摘      要：The microstructures and mechanical properties of Mg-7.0 wt%Y-1.0 wt%Nd-0.5 wt%Zr magnesium alloy were investigated both in as-cast condition and after homogenization heat treatment by differential scanning calorimetry(DSC),optical microscopy(OM),X-ray diffraction(XRD),scanning electron microscopy(SEM)and hardness *** results indicate that the ascast alloy consists ofα-Mg matrix,Mg24 Y5 and Mg41 Nd5 phases,which are eutectic phases(cubic Y-rich phase).With the increase in homogenization temperature and time,the Mg24 Y5 and Mg41 Nd5 phases are completely dissolved into matrix,and only yttrium of intermetallic compounds leaves around *** homogenization heat treatment,the elements distributed uniformly and the grains grow up not obviously,only yttrium element of intermetallic compounds left around *** optimum homogenization condition is at 537℃for 16 *** mechanical properties are improved after homogenization,with tensile strength ofσb=181 MPa,yielding strength ofσ(0.2)=144 MPa and elongation ofδ=5.5%,which are better than those of as-cast alloy.