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Processing, Microstructure and Mechanical Properties of Ti6Al4V Particles-Reinforced Mg Matrix Composites

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Novel Ti6Al4V particles-reinforced AZ91 Mg matrix composites were successfully fabricated by stir casting method. The stirring time in semisolid condition directly affected the particle distribution and the quality of the ingots. Furthermore, the optimal speed of the heating and the liquid stirring could overcome particle settlement caused by the density difference between the matrix and the particles. Ti6Al4V particles distributed uniformly in the composites with different particle contents. The average grain size decreased with the increase in the particle contents. The Ti6Al4V particles bonded pretty well with the alloy matrix. In addition, there were some interfacial reactions in the composites. There were rod-like Al3Ti phases at the interface. The precipitates extended from the particle surface to the matrix, and they might improve the interfacial bonding strength. The ultimate tensile strength, yield strength and elastic modulus were enhanced as the particle contents increased, and the elongation was much better than that of the same matrix material reinforced with SiC particles. Thus, the novel composites exhibit better comprehensive mechanical properties.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 51471059) and the China Postdoctoral Science Foundation (Grant No. 2014T70328).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    X. M. Wang, X. J. Wang, X. S. Hu, K. Wu & M. Y. Zheng

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  1. X. M. Wang
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  2. X. J. Wang
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  3. X. S. Hu
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  4. K. Wu
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  5. M. Y. Zheng
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Correspondence to X. J. Wang.

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Wang, X.M., Wang, X.J., Hu, X.S. et al. Processing, Microstructure and Mechanical Properties of Ti6Al4V Particles-Reinforced Mg Matrix Composites. Acta Metall. Sin. (Engl. Lett.) 29, 940–950 (2016). https://doi.org/10.1007/s40195-016-0473-3

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  • DOI: https://doi.org/10.1007/s40195-016-0473-3

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