Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 484, Issue 1-2, Pages 416-421Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.04.113
Keywords
Magnesium alloys; Scandium; Microstructure; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [50823006, 50721003]
- Postdoctoral Research Special Foundation of China [200801348]
- National High Technology Research and Development Program of China [2006AA03Z567]
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Mg-9Al-1Zn alloys with 0.3% Sc content (mass fraction) were prepared by ingot metallurgy. The effects of scandium addition on the microstructure and mechanical properties of the alloys have been investigated using optical microscope, scanning electron microscopy and tensile testing. It has been shown that the microstructure is mainly composed of alpha-Mg matrix, beta-Mg17Al12 phase and Mg5Al4Sc intermetallic compound when 0.3% Sc was added. The scandium addition improves the morphology and distribution Of Mg17Al12 phase, which substantially improves the mechanical properties of the alloy at both room temperature and high temperature. (C) 2009 Elsevier B.V. All rights reserved.
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