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Grain refinement of AM60B magnesium alloy by SiC particles

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Abstract

AM60B alloy has been refined by SiC particles and the corresponding refining mechanism has been mainly discussed. The results indicate that the addition of 0.2 wt% SiC particles in form of mixture with Mg powder decreases the grain size from 317 μm of the not refined alloy to 46 μm. The decrease of β phase and formation of Mg2Si and Al4C3 phases well demonstrate that the reactions of 3SiC + 4Al = Al4C3 + 3Si and 2Si + Mg = Mg2Si occur during refining treatment. In addition, the crystal nuclei are composed of two kinds of elements, Al and C. All of these imply that the formed Al4C3 particles are the actual heterogeneous nucleation substrates.

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Acknowledgements

This work was supported by the National Basic Research Program of China (grant No. G2007CB613706), the Development Program for Outstanding Young Teachers in Lanzhou University of Technology and the Opening Foundation of Key Laboratory of Gansu Advanced Non-ferrous Materials.

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  1. Key Laboratory of Gansu Advanced Nonferrous Materials, Lanzhou University of Technology, Lanzhou, 730050, China

    T. J. Chen, Y. Ma, W. B. Lv, Y. D. Li & Y. Hao

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  1. T. J. Chen
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  2. Y. Ma
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  3. W. B. Lv
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Correspondence to T. J. Chen.

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Chen, T.J., Ma, Y., Lv, W.B. et al. Grain refinement of AM60B magnesium alloy by SiC particles. J Mater Sci 45, 6732–6738 (2010). https://doi.org/10.1007/s10853-010-4767-y

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  • DOI: https://doi.org/10.1007/s10853-010-4767-y

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