Microstructural analysis of the creep resistance of die-cast Mg-4Al-2RE alloy

被引：132
|
作者：
Zhu, S. M. [1 ]
Gibson, M. A. [2 ]
Nie, J. F. [1 ]
Easton, M. A. [1 ]
Abbott, T. B. [3 ]
机构：
[1] Monash Univ, Dept Mat Engn, CAST CRC, Clayton, Vic 3800, Australia
[2] CSIRO Mat Sci & Engn, CAST CRC, Clayton, Vic 3169, Australia
[3] Adv Magnesium Technol, Milton, Qld 4064, Australia
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 06期
关键词：
Mg-Al-RE alloy; microstructure; TEM; creep resistance;
D O I：
10.1016/j.scriptamat.2007.10.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure and microstructural stability of die-cast AE42 (Mg-4Al-2RE) alloy were investigated by transmission electron microscopy. It is shown that the formation Of Mg17Al12 after ageing at 200 degrees C is not due to the decomposition of Al11RE3 as reported in the literature, but, rather, is associated with the supersaturation of Al solute in the alpha-Mg matrix. The level of Al solute retained in the alpha-Mg matrix after die-casting is suggested to be an important factor in influencing creep resistance. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：477 / 480
页数：4
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