期刊
MATERIALS & DESIGN
卷 32, 期 4, 页码 1967-1973出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2010.11.071
关键词
Non-ferrous metals and alloys; Casting; Microstructure
资金
- National Natural Science Funds of China [50725413]
- Major State Basic Re-search Development Program of China (973) [2007CB613704]
- Chongqing Science and Technology Commission in China (CSTC) [2010AC4085, 2009AB4134]
- Program for Hundreds of Distinguished Leading Scientists of CQCSTC
At present, the mechanical properties of the Mg-3Sn-2Ca magnesium alloy are not satisfying and further enhance needs to be considered via further alloying/microalloying additions. The effects of Zr addition on the as-cast microstructure and mechanical properties of the alloy were investigated by using optical and electron microscopies, differential scanning calorimetry (DSC) analysis, and tensile and creep tests. The results indicate that adding 0.41, 0.76 or 1.18 wt.% Zr can refine the grains of the alloy, and the primary CaMgSn phases in the Zr-containing alloys are changed from coarse needle-like net to relatively fine short block and/or particle-like shapes. As a result, the tensile and/or creep properties of the Zr-containing alloys are improved. Among the Zr-containing alloys, the alloy with the addition of 0.76 wt.% Zr exhibits the relatively optimum mechanical properties. (C) 2010 Elsevier Ltd. All rights reserved.
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