Effect of Ti−6Al−4V particle reinforcements on mechanical properties of Mg−9Al−1Zn alloy  

Ti−6Al−4V颗粒增强体对Mg−9Al−1Zn合金力学性能的影响

作　　者：Huan LUO Jian-bo LI Jun-liu YE Jun TAN Muhammad RASHAD Xian-hua CHEN Sheng-li HAN Kai-hong ZHENG Tian-tian ZHAO Fu-sheng PAN 罗欢;李建波;叶俊镠;谭军;Muhammad RASHAD;陈先华;韩胜利;郑开宏;赵甜甜;潘复生(重庆大学材料科学与工程学院,重庆400044;Department of Chemical Sciences,Bernal Institute,University of Limerick,Limerick V94T9PX,Ireland;广东省科学院新材料研究所,广州510650;重庆市质量与标准化研究院,重庆400023)

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]Department of Chemical Sciences,Bernal Institute,University of Limerick,Limerick V94T9PX,Ireland [3]Institute of New Materials,Guangdong Academy of Sciences,Guangzhou 510650,China [4]Chongqing Institute of Quality&Standardization,Chongqing 400023,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第10期3238-3249,共12页中国有色金属学报（英文版）

基　　金：Acknowledgments The authors acknowledge the financial support from the Guangdong Major Project of Basic and Applied Basic Research,China(No.2020B0301030006);the National Natural Science Foundation of China(Nos.52171133,52171103);the“111 Project”by the Ministry of Education of China(No.B16007);Fundamental Research Fund of Central Universities in China(No.2018CDJDCL0019)。

摘　　要：Mg−9Al−1Zn(AZ91)magnesium matrix composites reinforced by Ti−6Al−4V(TC4)particles were successfully prepared via powder metallurgical method.The yield strength(YS),ultimate tensile strength(UTS),and elongation(EL)showed a mountain-like tendency with the increase of the TC4 content.The mechanical properties of AZ91 magnesium matrix composites reached the optimal point with TC4 content of 10 wt.%,realizing YS,UTS,and EL of 335 MPa,370 MPa,and 6.4%,respectively.The improvement of mechanical properties can be attributed to the effective load transfer from the magnesium matrix to the TC4 particles,dislocations associated with the difference in the coefficient of thermal expansion,good interfacial bonding between the Mg matrix and TC4 particles,and grain refinement strengthening.采用粉末冶金法制备Ti−6Al−4V(TC4)颗粒增强Mg−9Al−1Zn(AZ91)镁基复合材料。随着TC4含量的增加,复合材料的屈服强度、极限抗拉强度和伸长率先升高后降低。当TC4颗粒的含量达到10%(质量分数)时,复合材料具有优异的综合力学性能,其屈服强度、抗拉强度和伸长率分别为335 MPa、370 MPa和6.4%。综合力学性能的改善是由于镁基体和TC4颗粒之间具有良好的界面结合,载荷可从镁基体转移到TC4颗粒上,其强化机制主要包括热膨胀系数差异引起的位错强化及细晶强化。

关 键 词：magnesium matrix composites powder metallurgy mechanical properties strengthening mechanisms 

分 类 号：TB331[一般工业技术—材料科学与工程]