Microstructure and mechanical properties of die-cast AZ91D magnesium alloy by Pr additions

作     者：崔晓鹏 刘海峰 孟健 张德平 

作者机构：Department of Materials Science and EngineeringKey Laboratory of Advanced Structrural Materialsof Ministry of EducationChangchun University of Technology State Key Laboratory of Rare Earth Resources UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences R&D Centre of Foundry CorporationFAW Group Corporation 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2010年第20卷第B07期

页      面：435-438页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 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：Project(2006AA03Z520)supported by National High-tech Research and Development Program of China Project(20080508)supported bythe Science and Technology Program of Jilin Province of China Project(2007094)supported by the Science and Technology Program of Education Department of Jilin Province of China Project(2007101)supported by the Science&Technology Development Program Project supported by the Basic Research Program of Changchun University of Technology,China 

主　　题：praseodymium magnesium alloy microstructure mechanical properties 

摘      要：Mg-9Al-xPr(x=0.4,0.8 and 1.2,mass fraction,%)magnesium alloys were prepared by high-pressure die-casting *** effects of Pr on the microstructures of die-cast Mg-9Al based alloy were investigated by XRD and ***-like Al11Pr3 phase and polygon Al6Mn6Pr phase are found in the *** 0.4%Pr addition,fine needle-like Al11Pr3 phase and a small amount of polygon Al6Mn6Pr phase near the grain boundary are found in the *** Pr addition to 0.8%, lots of coarse needle-like Al11Pr3 phase within grain and polygon Al6Mn6Pr phase on grain boundary are *** increasing Pr addition,the size of needle-like Al11Pr3 phase decreases,while the size of polygon Al6Mn6Pr relatively *** mass fraction of Pr at around 0.8%is considered to be suitable to obtain the optimal mechanical *** optimal mechanical properties are mainly resulted from grain boundary strengthening obtained by precipitates and solid solution.