Microstructural stability and creep properties of die casting Mg-4Al-4RE magnesium alloy

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2009.05.014· OSTI ID:22063614

Rzychon, Tomasz ^[1]; Kielbus, Andrzej; Cwajna, Jan ^[1]; Mizera, Jaroslaw ^[2]

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1. Silesian University of Technology, Faculty of Materials Science and Metallurgy, Krasinskiego 8, 40-019 Katowice (Poland)
2. Warsaw University of Technology, Woloska 141, 02-507 Warsaw (Poland)

The AE44 (Mg-4Al-4RE) alloy was prepared by a hot-chamber die casting method. The microstructure, microstructural stability and creep properties at 175 deg. C were investigated. The microstructure was analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and the Rietveld method. The results show that die cast AE44 magnesium alloy consists of {alpha}-Mg, Al{sub 11}RE{sub 3}, Al{sub 2}RE and Al{sub 2.12}RE{sub 0.88} phases. The Al{sub 11}RE{sub 3} phase is thermally stable at 175 deg. C whereas the metastable Al{sub 2.12}RE{sub 0.88} phase undergoes a transition into the equilibrium Al{sub 2}RE phase. The alloy investigated is characterized by good creep properties at temperatures of 175 deg. C and 200 {sup o}C.

• OSTI ID: 22063614
• Journal Information: Materials Characterization, Vol. 60, Issue 10; Conference: 8. STERMAT international conference on stereology and image analysis in materials science, Zakopane (Poland), 2-6 Sep 2008; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CASTING
CREEP
MAGNESIUM BASE ALLOYS
MICROSTRUCTURE
PHASE STABILITY
RARE EARTH ADDITIONS
SCANNING ELECTRON MICROSCOPY
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION