New cubic precipitate in Al–3.5Cu–1.0Li–0.5In (wt.%) alloy
New cubic precipitate in Al–3.5Cu–1.0Li–0.5In (wt.%) alloy
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DOI：
10.1016/j.matlet.2010.01.066
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发表时间：
2010-04
影响因子：
3
通讯作者：
Zheng-rong Pan;Zi-Qiao Zheng;Z. Liao;S. Li
中科院分区：
文献类型：
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作者：
Zheng-rong Pan;Zi-Qiao Zheng;Z. Liao;S. Li
采用HREM和3DAP研究了175℃时效下Al-3.5Cu-0.7Li合金的析出行为。发现一种新的立方相析出物为主导相，该相具有≈0.83nm的立方结构，与基体的取向关系为：（001）p//(001)α, [010]p//[010]α。考虑到观测和模拟的HREM图像的良好匹配，我们认为所研究的立方相是al5cu6mg2的变体，Li取代了Mg的位置。
The precipitations of Al–3.5Cu–0.7Li alloy aging at 175°C were studied by HREM and 3DAP. A new cubic phase precipitate has been discovered as the dominant phase, which is assumed having a cubic structure with a≈0.83nm and the orientation relationship with the matrix is: (001)p//(001)α, [010]p//[010]α. Considering the good match of observed and simulated HREM images, we suggest that the studied cubic phase is a variant of Al5Cu6Mg2with Li substituting the Mg positions.