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Effect of Al4C3 Particle Size Distribution in a Al–2.5C Master Alloy on the Refining Efficiency of the AZ31 Alloy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The Al–2.5C master alloy is prepared to investigate the effect of the Al4C3 particle size distribution on the refining efficiency of the AZ31 alloy. The results indicate that the Al4C3 particles are potent nucleation substrates for primary α-Mg grains. With 1.0 wt% master alloy addition, the grain size is reduced from 204 to 70 μm. The grain refining efficiency of the Al4C3 particles on the AZ31 alloy is calculated to be 0.04%–0.75%. Such low refining efficiency is mainly attributed to the size distribution of the Al4C3 particles. The particle sizes are in the range from 0.18 to 7.08 μm, and their distribution is well fitted by a log-normal function. The optimum particle size range for significant grain refinement is proposed to be around 5.0–7.08 μm in the present conditions.

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Acknowledgements

The work was supported by the National Key Research and Development Program of China (No. 2016YFB0701204) and the project (DUT15JJ (G) 01) supported by the Fundamental Research Funds for the Central Universities.

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Authors and Affiliations

  1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Yu-Zhen Zhao, Xiao-Teng Liu & Hai Hao

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  1. Yu-Zhen Zhao
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  2. Xiao-Teng Liu
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  3. Hai Hao
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Correspondence to Hai Hao.

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Zhao, YZ., Liu, XT. & Hao, H. Effect of Al4C3 Particle Size Distribution in a Al–2.5C Master Alloy on the Refining Efficiency of the AZ31 Alloy. Acta Metall. Sin. (Engl. Lett.) 30, 505–512 (2017). https://doi.org/10.1007/s40195-017-0556-9

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  • DOI: https://doi.org/10.1007/s40195-017-0556-9

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