The Effects of Al-Ca Compounds on Grain Refinement of Mg-Ca Alloys

Abstract:

In the present work, Al-Ca metallic compound was prepared in Mg-Ca alloys and the effects of Al-Ca metallic compound and different Al/Ca values on the grain refinement of Mg-Ca alloys were investigated by scanning electron microscopy and X-ray diffraction, and the mechanism of grain refinement of Mg-Ca alloys was discussed. The results showed that the grain size of Mg-0.5Ca alloy was obviously reduced from 550μm to 230μm due to the addition of Al. Al₂Ca phase existed in these alloys and its morphology evolved from granular to rod-like. It is regarded as the main factor for the grain refinement.

• Periodical: Materials Science Forum (Volume 686)
• Pages: 348-354
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.686.348
• Online since: June 2011
• Authors: Shu Tao Xiong, Fu Sheng Pan, Bin Jiang, Xiao Ke Li
• Keywords: Grain Refinement, Magnesium Alloy, Metallic Compound

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