Microstructure and properties of Mg-Li-Al alloys with Mn addition

作     者：LI Hong-bin YAO Guang-chun LIANG Chun-lin LIU Yi-han JI Hai-bin LIU Zhen-gang 

作者机构：School of Material and Metallurgy Northeastern University Shenyang 110004 Liaoning China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2006年第3卷第3期

页      面：204-207页

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）] 

主　　题：Mg-Li-Al alloy Mn microstructure tensile properties 

摘      要：Mg-xLi-Al alloys with Mn addition from 0.2% to 1.5 % by wt. were produced and studied. The density of the alloys is very low, between 1.21 g/cm3 and 1.64 g/cm3, while the microstructures change from single α-, (α+β)-, to single β-phase with lithium content rising from 5 % to 22 % by wt. The main alloy studied was LA92 alloy with Mn addition. The results of the tensile tests show that the strength decreases with increasing lithium content, while the elongation increases sharply, and the UTS and YS rise by 26.8% and 22.7% respectively, when 0.5 % by wt. Mn is added. It is also known, by microstructure observation, SEM with EDS and X-ray analysis, that adding Mn can produce some new hard phases in the alloy, which may worsen the tensile properties.