Effect of Ca additions on microstructure and microhardness of an as-cast Mg-5.0 wt.% Al alloy

被引：57
|
作者：
Han, Lihong [1 ]
Hu, Henry [1 ]
Northwood, Derek O. [1 ]
机构：
[1] Univ Windsor, Dept Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada
来源：
MATERIALS LETTERS | 2008年 / 62卷 / 03期
关键词：
Mg-Al-Ca alloy; hardness; indentation size effect; microstructure;
D O I：
10.1016/j.matlet.2007.05.047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of Ca additions (0.5-2.0 wt.%) on the microstructure and the microhardness of an as-cast Mg-5.0 wt.% Al alloy have been investigated. The coarse microstructure of the base alloy can be refined through adding Ca. DSC and TEM results showed that, as Ca additions increased up to 1.5 wt.% Ca, the beta-Mg17Al12 phase was completely replaced by a (Al, Mg)(2)Ca phase. The Vickers microhardness of the as-cast Mg-Al-Ca alloys increased with increasing Ca content. Tests on the Mg-5.0Al-2.0Ca (wt.%) alloy showed an indentation size effect, which was well described by Meyer's Law. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：381 / 384
页数：4
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