Microstructure and mechanical properties of high-strength high-pressure die-cast Mg–4Al–3La–1Ca–0.3Mn alloy

作     者：Peng-Fei Qin Qiang Yang Yu-Ying He Jing-Huai Zhang Jin-Shu Xie Xi-Ru Hua Kai Guan Jian Meng Peng-Fei Qin;Qiang Yang;Yu-Ying He;Jing-Huai Zhang;Jin-Shu Xie;Xi-Ru Hua;Kai Guan;Jian Meng

作者机构：Key Laboratory of Superlight Materials and Surface TechnologyMinistry of EducationHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Materials Science and EngineeringUniversity of TokyoTokyo 113-8654Japan 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第10期

页      面：2956-2963页

核心收录：

学科分类：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] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51701200 and 11804030) the Fundamental Research Funds for the Central Universities (No.3072020CF1009) the Open Funds of the State Key Laboratory of Rare Earth Resource Utilization (Nos.RERU2020008 and 2020012) the Scientific and Technological Developing Scheme of Jilin Province (No.20200801048GH) the Jilin Scientific and Technological Development Programs (No.20200201240JC) 

主　　题：Magnesium alloys High-pressure die-cast Mechanical property Intermetallic phase 

摘      要：A new high-pressure die-cast(HPDC) Mg–4 Al–3 La–1 Ca–0.3 Mn(ALaX431) alloy with high strength has successfully been fabricated. This HPDC alloy in peakaged state exhibits tensile yield strength(TYS) of 220 MPa at room temperature and TYS of 145 MPa at 250 ℃,higher than the corresponding strength of HPDC Mg alloys reported so far. These high strengths are mainly due to the formation of fine grained structure, semi-continuous reticular structure consisting of stable Al_(3)La and(Mg,Al)2 Ca particles along grain boundaries and numerous nanoscale Al_(2)Ca precipitates within grains. Due to its higher strength than existing HPDC Mg alloys, the new developed alloy has great application potential.