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Microstructure and Mechanical Property of Ti-5Al-2.5Sn/Ti-6Al-4V Dissimilar Titanium Alloys Integrally Fabricated by Selective Laser Melting

  • The 2nd Asia-Pacific International Conference on Additive Manufacturing (APICAM 2019)
  • Published:
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Abstract

Metallic structural components made from dissimilar titanium alloys are playing important roles in high-end industries such as aerospace and aviation. In this paper, a Ti-5Al-2.5Sn/Ti-6Al-4V dissimilar titanium alloy material was additively manufactured by the selective laser melting (SLM) process. Interface characteristics, microstructure, and mechanical properties of the SLM-deposited samples before and after complete annealing treatment were researched to provide some technical basics for the integral fabrication of dissimilar titanium alloy components. The results demonstrated that a defect-free metallurgical bonded interface with a ~ 70-μm-wide element inter-diffusion region could be obtained between the Ti-5Al-2.5Sn and Ti-6Al-4V layers under both the as-deposited and the complete annealing states. The interfacial bonding strength between the dissimilar titanium alloys was always higher than the strength of the Ti-5Al-2.5Sn layers. Microstructure evolution and element inter-diffusion mechanisms of the SLM-produced Ti-5Al-2.5Sn/Ti-6Al-4V samples were also revealed and related to the change in mechanical properties.

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Acknowledgements

This work was supported by National Key R&D Program of China (Grant No. 2017YFB1103800) and China Postdoctoral Science Foundation (Grant No. 2018M642829).

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Authors and Affiliations

  1. Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China

    Kaiwen Wei, Xiaoyan Zeng, Mengna Liu & Jinfeng Deng

  2. Wuhan Space Sanjiang LITRI Co., Ltd., Wuhan, 430000, China

    Fangzhi Li

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  1. Kaiwen Wei
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  2. Xiaoyan Zeng
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  3. Fangzhi Li
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  4. Mengna Liu
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Correspondence to Xiaoyan Zeng.

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Wei, K., Zeng, X., Li, F. et al. Microstructure and Mechanical Property of Ti-5Al-2.5Sn/Ti-6Al-4V Dissimilar Titanium Alloys Integrally Fabricated by Selective Laser Melting. JOM 72, 1031–1038 (2020). https://doi.org/10.1007/s11837-019-03988-6

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  • DOI: https://doi.org/10.1007/s11837-019-03988-6

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