Strength and elastic modulus enhancement in Mg-Li-Al matrix composites reinforced by ex situ TiB2 particles via stir casting

作     者：Jiawei Sun Dehua Ding Wencai Liu Guohua Wu Hongjie Liu Guangling Wei Hezhou Liu 

作者机构：National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2024年第12卷第9期

页      面：3574-3588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：supported by the National Natural Science Foundation of China(Nos.51821001 and U2037601) Major Scientific and Technological Inno-vation Projects in Luoyang(No.2201029A) Foundation Strengthening Plan Technical Field Fund(No.2021-JJ-0112) Shanghai Jiao Tong University Student Innovation Prac-tice Program(No.IPP24076) 

主　　题：Mg-Li composite Stir casting Elastic modulus Microstructure Mechanical properties 

摘      要：A novel Mg^(-1)0Li-3Al(wt.%,LA103)matrix composite reinforced by ex situ micron TiB_(2) particles was developed in the present *** ball milling and cold pressing pretreatment of the reinforcements made it feasible to prepare this material under stir casting conditions with good *** microstructure and mechanical properties of the composites prepared by different pretreatment methods were analyzed in *** TiB_(2) particles in the Al-TiB_(2)/LA103 composite using the pretreatment process were uniformly distributed in the microstructure due to the formation of highly wettable core-shell units in the *** with the matrix alloys,the Al-TiB_(2)/LA103 composite exhibited effective strength and elastic modulus improvements while maintaining acceptable *** strengthening effect in the composites was mainly attributed to the strong grain refining effect of *** work shows a balance of high specific modulus(36.1 GPa·cm^(3)·g^(-1))and elongation(8.4%)with the conventional stir casting path,which is of considerable application value.