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Microstructure and Mechanical Properties of an AlN/Mg–Al Composite Synthesized by Al–AlN Master Alloy

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Abstract

In this work, a kind of AlN particles reinforced Mg–Al matrix composite was fabricated by introducing Al–12.5AlN master alloy into the Mg melt during casting. In the 0.8AlN/Mg–8Al composite, the nano-sized AlN particles are uniformly distributed, exhibiting a clean interface with the matrix. The introduction of AlN results in the refinement of α-Mg grains through modifying its dendrite morphology, and the β-Mg17Al12 intermetallic was also changed from continuous coarse-like to fine morphology. As a result, compared with Mg–8Al matrix alloy, the tensile strength and elongation of the 0.8AlN/Mg–8Al composite were increased by 31% and 213%, respectively. The strengthening mechanism and fracture behaviors were discussed.

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Acknowledgements

This research was financially supported by the National Natural Science Foundation of China (Nos. 51601106 and 51731007), China Postdoctoral Science Foundation (No. 2017T100489), Fundamental Research Funds of Shandong University (2016GN012).

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Authors and Affiliations

  1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, People’s Republic of China

    Zengqiang Li, Tong Gao, Qingfei Xu, Huabing Yang, Mengxia Han & Xiangfa Liu

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  1. Zengqiang Li
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  2. Tong Gao
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  3. Qingfei Xu
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  4. Huabing Yang
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  5. Mengxia Han
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Correspondence to Tong Gao.

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Li, Z., Gao, T., Xu, Q. et al. Microstructure and Mechanical Properties of an AlN/Mg–Al Composite Synthesized by Al–AlN Master Alloy. Inter Metalcast 13, 384–391 (2019). https://doi.org/10.1007/s40962-018-0261-0

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  • DOI: https://doi.org/10.1007/s40962-018-0261-0

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