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Insight into the aging behavior of a novel Al-Li-Cu-Mg alloy

被引：3
|
作者：
Wang, Yixiao [1 ]
Wu, Guohua [1 ]
Zhang, Liang [1 ]
Guo, Youjie [1 ]
Li, Liangbin [2 ]
Xiong, Xunman [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Sch Mat Sci & Engn, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China
[2] Jiangxi Ganfeng Lithium Co Ltd, Xinyu 338004, Jiangxi, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 349卷
基金：
中国国家自然科学基金;
关键词：
Microstructure; Cast; Al -Li -Cu -Mg -x alloy; Cubic phase; Mechanical properties; MECHANICAL-PROPERTIES; MICROSTRUCTURE; ADDITIONS; EVOLUTION;
D O I：
10.1016/j.matlet.2023.134854
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure evolution corresponding to the mechanical properties of cast Al-2Li-2Cu-0.5Mg-0.15Sc-0.1Zr-0.1Ti alloy aged at 175 degrees C was investigated, especially in the identification and variation of the cubic phase. The yield strength and ultimate strength of the peak-aged alloy reach 449 MPa and 502 MPa, respectively. From the transmission electron microscopy characterization, it was found that the precipitates primarily consisted of the cubic phase, T1 (Al2CuLi), S & PRIME;(Al2CuMg), core-shell particles and 6 & PRIME;(Al3Li) phases. Longer exposure to temperature changed the composition from Al6Cu5Li2 to Al6Cu5Mg2, and these two phases are in competition with the T1 and S & PRIME; phases.
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页数：4
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