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- Title
Microstructure Evolution and Hardness Variation of Mg-9Li-6Al- xLa ( x = 0 and 2.0) Alloys Under Different Aging Parameters.
- Authors
Wang, Tianzi; Qu, Zhikun; Fei, Pengfei; Wu, Ruizhi
- Abstract
Mg-9Li-6Al(LA96) and Mg-9Li-6Al-2La(LA96-2La), after solution treatment, were aged at 50°C and 150°C, respectively. The microstructure evolution and hardness variation of the alloys under different aging parameters were investigated. The results show that the morphology of MgLiAl( θ) 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 α phases precipitate from β phases. The microstructure evolution leads to a continuous decrease in hardness. A temporary increase of hardness appears in the process of aging treatment at 150°C because of the precipitation of AlLi phases. The addition of La inhibits the variation of MgLiAl morphology and the precipitation of small and stripy α phases in β phases, and it makes the decrease rate of hardness become lower in the process of aging treatment.
- Subjects
ALLOYS; AGING; HARDNESS; MICROSTRUCTURE; MAGNESIUM; LITHIUM; LANTHANUM
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2015, Vol 67, Issue 10, p2442
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-015-1306-y