Microstructure Evolution and Hardness Variation of Mg-9Li-6Al-xLa (x=0 and 2.0) Alloys Under Different Aging Parameters

被引：4
作者：
Wang, Tianzi [1 ]
Qu, Zhikun [1 ]
Fei, Pengfei [1 ]
Wu, Ruizhi [1 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
来源：
JOM | 2015年 / 67卷 / 10期
关键词：
MECHANICAL-PROPERTIES; BEHAVIOR; LITHIUM;
D O I：
10.1007/s11837-015-1306-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mg-9Li-6Al(LA96) and Mg-9Li-6Al-2La(LA96-2La), after solution treatment, were aged at 50A degrees C and 150A degrees C, respectively. The microstructure evolution and hardness variation of the alloys under different aging parameters were investigated. The results show that the morphology of MgLi2Al(theta) phases in LA96 changes from short and rod like to particulate during the aging period, and the size of particulate phase becomes larger and larger in the late aging period. The small, stripy alpha phases precipitate from beta phases. The microstructure evolution leads to a continuous decrease in hardness. A temporary increase of hardness appears in the process of aging treatment at 150A degrees C because of the precipitation of AlLi phases. The addition of La inhibits the variation of MgLi2Al morphology and the precipitation of small and stripy alpha phases in beta phases, and it makes the decrease rate of hardness become lower in the process of aging treatment.
引用
收藏
页码：2442 / 2449
页数：8
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