Microstructural analysis of the improved creep resistance of a die-cast magnesium-aluminium-rare earth alloy by strontium additions

被引：73

作者：

Dargusch, M. S. ^{[1
]}

Zhu, S. M. ^{[2
]}

Nie, J. F. ^{[2
]}

Dunlop, G. L. ^{[3
]}

机构：

[1] Univ Queensland, Sch Engn, CAST CRC, St Lucia, Qld 4075, Australia

[2] Monash Univ, Dept Mat Engn, CAST CRC, Clayton, Vic 3800, Australia

[3] Adv Magnesium Technol, Milton, Qld 4064, Australia

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 02期

关键词：

Magnesium alloys; Microstructure; TEM; Creep resistance; BEHAVIOR; AE42;

D O I：

10.1016/j.scriptamat.2008.09.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure of die-cast AE42 (Mg-4Al-2RE, wt.%) with the addition of 1 wt.% Sr has been investigated by electron microscopy. It is shown that Sr additions result in the formation of an additional intermetallic phase with the approximate composition of Mg8Al4Sr. There is no evidence of the precipitation of Mg17Al12 phase after ageing at 200 degrees C for 2 weeks. The improved creep resistance of the Sr containing AE42 is associated with the reduced level of Al solute in the alpha-Mg matrix. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：116 / 119

页数：4

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