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Research on Hot Compressive Deformation of TiBw/TA15 Composite Cylindrical Billet with Network-Distributed Reinforcements

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Abstract

A TA15 matrix composite reinforced by 3.5 vol.% TiB whiskers with a network microstructure was fabricated by the reaction hot pressing method. After sintering, the composite developed a net-like microstructure. To improve the mechanical properties, a cylindrical billet of the as-sintered TiBw/TA15 composite was subjected to upsetting and swaging operations with intermediate heating at 1000°C. The original equiaxed network units were stretched slightly, and the matrix had a microstructure evolution from a basket structure to a bi-modal structure after hot forging. The results of tensile tests at room temperature showed that the ultimate tensile strength and elongation of the composite increased by 8.2% and 130%, respectively, while the yield strength appeared to remain constant. Furthermore, the mechanical properties of the as-forged composite also improved at an elevated temperature.

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Acknowledgements

The authors would like to acknowledge financial support from the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1229), the National Natural Science Foundation of China (No. 51674093), the Natural Science Foundation of Heilongjiang Province (No. E201425), the Fundamental Research Funds for the Central Universities (No. HIT.MKSTISP.2016019), and the Postdoctoral Scientific Research Development Fund of Heilongjiang Province (No. LBH-Q15040). The TiBw/TA15 composites were provided by Prof. LuJun Huang and Lin Geng (School of Materials Science and Engineering, Harbin Institute of Technology, China).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China

    Rui Zhang, DongJun Wang & ShiJian Yuan

  2. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China

    DongJun Wang & ShiJian Yuan

  3. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin, 150001, People’s Republic of China

    DongJun Wang

Authors
  1. Rui Zhang
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  2. DongJun Wang
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  3. ShiJian Yuan
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Correspondence to DongJun Wang.

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Zhang, R., Wang, D. & Yuan, S. Research on Hot Compressive Deformation of TiBw/TA15 Composite Cylindrical Billet with Network-Distributed Reinforcements. JOM 69, 1830–1835 (2017). https://doi.org/10.1007/s11837-017-2477-5

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  • DOI: https://doi.org/10.1007/s11837-017-2477-5

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