Grain refinement of Mg-Al(-Mn) alloys by SiC additions

被引：114
作者：
Easton, Mark A.
Schiffl, Andreas
Yao, Ji-Yong
Kaufmann, Helmut
机构：
[1] Monash Univ, Dept Mat Engn, Melbourne, Vic 3800, Australia
[2] Univ Queensland, Div Mat Engn, Brisbane, Qld, Australia
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 04期
关键词：
magnesium alloys; solidification microstructure; grain refining; casting;
D O I：
10.1016/j.scriptamat.2006.04.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The addition of SiC particles effectively grain refined a range of Mg-Al alloys. The greatest reductions in grain size were found for the alloys with lower Al contents. The presence of Mg2Si in the microstructure after that SiC addition, and consideration of phase equilibria suggested that the SiC transforms to Al4C3, and this is the actual nucleant. The addition of Mn poisoned the grain refining effect of the SiC addition, probably due to the formation of less potent Al-Mn-carbides. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：379 / 382
页数：4
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