Precipitation of (Al,Si)3Sc in an Al-Sc-Si alloy

被引：49
作者：
Du, Gang [2 ]
Deng, Jingwei [2 ]
Wang, Yongli [2 ]
Yan, Desheng
Rong, Lijian [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Div Mat Special Environm, Shenyang 110016, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
SCRIPTA MATERIALIA | 2009年 / 61卷 / 05期
关键词：
Aluminium alloys; Ageing; 3DAP; Precipitation; Hardness test; COHERENCY LOSS; EVOLUTION; ZR;
D O I：
10.1016/j.scriptamat.2009.05.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Three-dimensional atom probe has been applied to investigate the solubility of Si in Al3SC in an Al-0.16Sc-0.05Si alloy. It was found that L1(2)-structured Si-containing Al3Sc precipitates formed after the alloy was aged at 300 degrees C. Results of first-principles calculation indicated that Si atoms tend to substitute Al sites in Al3Sc, and thus the precipitates can be represented as (Al,Si)(3)Sc. The (Al,Si)(3)SC was found to have a dramatic precipitation-strengthening effect in the cast alloy. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：532 / 535
页数：4
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