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    • Effects of SiC on the Grain Refinement in AZ91D Magnesium Alloy

    • Jiang Xiangdong

      1 ,

      Chen Tijun

      1 ,

      Ma Ying

      1 ,

      Hao Yuan

      1
    • Vol. 29, Issue 8, Pages: 763-766(2009)   

      Published: 2009

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  • Jiang Xiangdong, Chen Tijun, Ma Ying, et al. Effects of SiC on the Grain Refinement in AZ91D Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 29(8):763-766(2009) DOI:
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    Abstract

    Effects of SiC content on microstructure of AZ91D magnesium alloy were observed with adding varied Mg-SiC powder at different temperature by OM (optical microscope) and SEM (scanning electron microscope)as well as EPMA. The grain with size of 75 μm in the AZ91D magnesium alloy can be presented with 0.20% SiC addition at 760780 ℃. The results reveal that the grain size in the AZ91D magnesium alloy is remarkably reduced with Mg-SiC mixed powder,which is attributed to the creation of a little Al4C3 phase as the nuclei of α-Mg phase due to the reaction of Mg-SiC mixed powder and SiC as heterogeneous nuclei of α-Mg phase. Mg-SiC mixed powder is a desirable grain refiner for the AZ91D magnesium alloy.

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    Keywords

    Magnesium Alloy; Mg-SiC Mixed Powder; Al4C3; Grain Refinement

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