Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 528, Issue 16-17, Pages 5453-5457Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.03.049
Keywords
Mg-12Gd-2Y-0.5Sm-0.5Sb-0.5Zr alloy; Microstructure; Long-period ordered (LPO) phase; Mechanical properties
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Funding
- Henan Research Program of Application Foundation and Advanced Technology [102300410018]
- Allotment Planning for College Excellence Young Teachers in Zhejiang Province
- Taizhou Vocational & Technical College [2011ZD07]
- Zhejiang Industrial Technology Project for Public Welfare
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The Mg-12Gd-2Y-0.5Sm-0.5Sb-0.5Zr (wt.%) alloy was prepared by casting technology. The microstructure of alloy was then investigated after solution and aging treatment (i.e., T6 heat treatment). Tensile tests were performed at a crosshead speed of 1 mm/min at ambient and elevated temperature atmosphere. The results show that the aged alloy was mainly composed of alpha-Mg matrix and dispersed long-period ordered beta' precipitates. At 250 degrees C, the alloy has shown the superior tensile strength (i.e., 345.5 MPa). The remarkable high strength of experimental alloy was mainly associated with solution strengthen of RE and precipitation strengthening of dispersive LPO structure beta' precipitates in Mg matrix. The LPO beta' precipitates provide important strengthening sources in experimental alloy, especially at elevated temperatures. (C) 2011 Elsevier B.V. All rights reserved.
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