Mechanism of grain refinement of Mg-Al alloys by SiC inoculation

被引：74
|
作者：
Huang, Yuanding [1 ]
Kainer, Karl Ulrich [1 ]
Hort, Norbert [1 ]
机构：
[1] Helmholtz Zentrum Geesthacht, MagIC Magnesium Innovat Ctr, D-21502 Geesthacht, Germany
来源：
SCRIPTA MATERIALIA | 2011年 / 64卷 / 08期
关键词：
Magnesium alloys; Carbon inoculation; Grain refining; Al2MgC2; Solidification; HETEROGENEOUS NUCLEATION; MAGNESIUM-ALLOY; INTERFACE;
D O I：
10.1016/j.scriptamat.2011.01.005
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The mechanism of grain refinement was investigated for Mg-Al alloys inoculated with SiC particles. Contrary to the previously reported Al4C3 hypothesis, the ternary carbide Al2MgC2 was observed, which has a crystal structure closer to that of Mg than to that of Al4C3. In the centre of the grains, one or more "hillocks" enriched in Al and C were observed. Based on the observed phenomena, a novel mechanism is suggested to explain the grain refinement of Mg-Al alloys with the addition of SiC particles. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：793 / 796
页数：4
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