Enhanced precipitation hardening of Mg-Ca alloy by Al addition

被引：113
作者：
Jayaraj, J. [1 ]
Mendis, C. L. [1 ]
Ohkubo, T. [1 ]
Oh-ishi, K. [1 ]
Hono, K. [1 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
SCRIPTA MATERIALIA | 2010年 / 63卷 / 08期
基金：
日本学术振兴会;
关键词：
Magnesium alloys; Precipitation hardening; Aging; Guinier-Preston zone; ZN ALLOY; MAGNESIUM ALLOYS; TEMPERATURE; STRENGTH;
D O I：
10.1016/j.scriptamat.2010.06.028
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report the enhanced precipitation-hardening response of Mg-0.5Ca (wt.%) alloy by microalloying with Al. The peak hardness of 50 HV for the binary alloy was enhanced to 72 HV in a ternary Mg-0.5Ca-0.3Al alloy. Transmission electron microscopy and 3D atom probe analyses confirmed that the improvement in the peak hardness is associated with the dense precipitation of ordered monolayer Guinier-Preston zones and the subsequent formation of Al(2)Ca causes the over-aging. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：831 / 834
页数：4
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