Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 528, Issue 15, Pages 4973-4981Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.02.095
Keywords
Magnesium alloy; Mg-Sn-Mn alloy; Zr; Sc; Ce
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Funding
- The National Natural Science Funds of China [50725413]
- The Major State Basic Research Development Program of China (973) [2007CB613704]
- The Chongqing Science and Technology Commission in China (CSTC) [2010AC4085, 2009AB4134]
- Program for Hundreds of Distinguished Leading Scientists of CQCSTC [2010CSTC-HDLS]
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In this paper, the effects of Zr, Sc and Ce additions on the as-cast microstructure and mechanical properties of Mg-3Sn-1Mn (wt.%) magnesium alloy were preliminarily investigated and compared. The results indicate that adding 0.36 wt.% Sc and 0.87 wt.% Ce to the Mg-3Sn-1Mn alloy, respectively leads to the formation of the extra phases of Mg-Sn-Sc and Mg12Ce while adding 0.43 wt.% Zr does not cause the formation of any new phases. At the same time, adding 0.43 wt.% Zr or 0.87 wt.% Ce can refine the grains while adding 0.36 wt.% Sc coarsens the grains. Among the Zr- and Ce-containing alloys, the grains of the latter are relatively finer than those of the former. In addition, adding 0.43 wt.% Zr, 0.36 wt.% Sc and 0.87 wt.% Ce to the Mg-3Sn-1 Mn alloy can improve the tensile and/or creep properties of the alloy. However, the addition of 0.43 wt.% Zr is not beneficial to the creep properties. Among the Zr-, Sc- and Ce-containing alloys, the alloy with the addition of 0.87 wt.% Ce exhibits the optimal tensile and creep properties. (C) 2011 Elsevier B.V. All rights reserved.
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