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

Dargusch, Matthew S., S.M. Zhub, J.F. Nieb and G.L. Dunlop (2009) Microstructural analysis of the improved creep resistance of a die-cast magnesium–aluminium–rare earth alloy by strontium additions. Scripta Materialia, 60 2: 116-119. doi:10.1016/j.scriptamat.2008.09.013


Author Dargusch, Matthew S.
S.M. Zhub
J.F. Nieb
G.L. Dunlop
Title Microstructural analysis of the improved creep resistance of a die-cast magnesium–aluminium–rare earth alloy by strontium additions
Journal name Scripta Materialia   Check publisher's open access policy
ISSN 1359-6462
Publication date 2009-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.scriptamat.2008.09.013
Open Access Status
Volume 60
Issue 2
Start page 116
End page 119
Total pages 4
Place of publication New York, USA
Publisher Pergamon
Language eng
Subject C1
0912 Materials Engineering
091207 Metals and Alloy Materials
8612 Fabricated Metal Products
Abstract 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.
Formatted abstract
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 °C for 2 weeks. The improved creep resistance of the Sr containing AE42 is associated with the reduced level of Al solute in the α-Mg matrix.
Keyword Magnesium alloys
Microstructure
TEM
Creep resistance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 27 September 2008. In print Scripta Materialia Volume 60, Issue 2, January 2009, Pages 116-119

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Thu, 11 Jun 2009, 03:39:14 EST by Siona Saplos on behalf of Materials