Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 477, Issue 1-2, Pages 193-197Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2007.05.081
Keywords
Mg-Gd-Dy-Zr alloy; microstructure; age hardening behavior; mechanical property
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The Mg-8.31Gd-1.12Dy-0.38Zr (mass%) alloy was prepared by casting technology, and the microstructure, age hardening behavior and mechanical property have been investigated. It is noted that the alpha-Mg and the different Mg-RE (RE = Gd/Dy) compounds are subsistent in the as-cast and annealed state samples. The age hardening behavior is observed during the investigated temperature range, and the alloy exhibits high Vickers hardness, excellent ultimate tensile strength and yield strength at peak hardness. The peak hardness and time of reaching peak hardness decrease with the increase of aging temperature. The high mechanical property is mainly attributed to the dispersed fine beta'-Mg15RE3 and beta-Mg5RE precipitates. (c) 2007 Elsevier B.V. All rights reserved.
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