Effect of Mn addition on microstructure and mechanical properties of cast Al-2Li-2Cu-0.8Mg-0.4Zn-0.2Zr alloy

被引：11
作者：
Chen, Antao
Zhang, Liang [1 ]
Wu, Guohua [1 ]
Peng, Yu
Li, Yanlei
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2016年 / 31卷 / 02期
基金：
中国国家自然科学基金;
关键词：
CU-MG ALLOYS; PRECIPITATION; BEHAVIOR; FE; IMPURITIES; NUCLEATION; DUCTILITY; KINETICS; FRACTURE; STATE;
D O I：
10.1557/jmr.2015.408
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of 0.5 wt% Mn addition on the microstructure and mechanical properties of cast Al-2Li-2Cu-0.8Mg-0.4Zn-0.2Zr (wt%) alloy was investigated. Results showed that the grain size of Mn-containing alloy was smaller than that of Mn-free alloy in both the as-cast and solution treated state. Al20Mn3Cu2 dispersoids were formed during solution treatment in the Mn-containing alloy. After aging at 175 degrees C for 32 h, a large volume fraction of coherent Al3Li/Al-3(Li, Zr) particles were precipitated in both Mn-free and Mn-containing alloys, while more Guinier-Preston-Bagaratsky zones were observed in the Mn-free alloy. Mn addition improved the elongation significantly, which was 1.7% for Mn-free alloy and 3.3% for the alloy with 0.5 wt% Mn addition.
引用
收藏
页码：250 / 258
页数：9
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