Microstructures and mechanical properties of a newly developed high-pressure die casting Mg-Zn-RE alloy

作     者：Xiru Hua Qiang Yang Dongdong Zhang Fanzhi Meng Chong Chen Zihao You Jinghuai Zhang Shuhui Lv Jian Meng Xiru Hua;Qiang Yang;Dongdong Zhang;Fanzhi Meng;Chong Chen;Zihao You;Jinghuai Zhang;Shuhui Lv;Jian Meng

作者机构：Key Laboratory of Superlight Materials&Surface TechnologyMinistry of EducationHarbin Engineering UniversityHarbin150001China State Key Laboratory of Rare Earth Resources Utilization.Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Materials Science and EngineeringChangchun University of Science and TechnologyChangchun130022China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第52卷第18期

页      面：174-184页

核心收录：

学科分类：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）] 

基　　金：supported by the National Natural Science Foundation of China under grants no.51701200 and 51871069 the Scientific and Technological Developing Scheme of Jilin Province under grants no.20200801048GH 

主　　题：Magnesium alloys High-pressure die casting(HPDC) Transmission electron microscopy(TEM) Intermetallic phase Mechanical properties 

摘      要：A newly developed Mg-4Zn-2La-3Y alloy with high strength was fabricated by high-pressure die casting method,and its microstructures were thoroughly studied using transmission electron *** results demonstrate that it owns fine grains and approximately highly interconnected intermetallic phase skeletons,and exhibits ultra-high strength at both room and high ***,the eutectic intermetallic skeleton of this alloys is consisted of numerous fine particles,which are mainly consisted of two intermetallic phases,namely W and ***{101}twins and SFs were found in the Mg12RE phase while a few of SFs in the W ***,minor long-period stacking ordered phase was observed in the eutectoid phase,and it probably nucleated on the Mg12RE phase following a certain OR as(0002)14H//(110)Mg12REand[1120]14H//[111]Mg12RE,or(0002)14H//(211)Mg12REand[1120]14H//[111]*** special intermetallic skeleton with many interfaces and planar faults can efficiently transfer dislocations across grain boundaries,and this is the key factor for the outstanding mechanical properties of the studied alloy.