Abstract
The electrochemical behavior of Ti–6Al–4V with 1 mm and 16 mm thickness prepared by electron beam powder bed fusion (EB-PBF) was investigated in phosphate buffered saline. Electrochemical results showed that EB-PBF Ti–6Al–4V with a larger component size was more resistant to corrosion compared to the smaller component, because of less acicular αʹ phase content and more β phase content. As a non-equilibrium phase in the “high-energy state”, αʹ phase has a greater susceptibility to corrode and reduces the corrosion resistance of the material, while β phase improves corrosion resistance of titanium alloys. The results show that the phase composition has a more significant effect on the corrosion performance than the grain size.
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Acknowledgements
This work was supported partially by the National Natural Science Foundation of China (U2241245), the CAS Interdisciplinary Innovation Team Project (JCTD-2020-10) of China, the State Key Laboratory of Light Alloy Casting Technology for High-End Equipment (LACT-007), the Opening project of National Key Laboratory of Shock Wave and Detonation Physics (2022JCJQLB05702) and the Original Fund of Nuclear Power Institute of China (kJCX-2022-YC2-20).
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Hongyu Zheng and **n Gai both authors contributed equally to this paper.
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Zheng, H., Gai, X., Bai, Y. et al. Influence of Component Size on the Corrosion Behavior of Ti6Al4V Alloy Fabricated by Electron Beam Powder Bed Fusion. Acta Metall. Sin. (Engl. Lett.) 37, 159–168 (2024). https://doi.org/10.1007/s40195-023-01609-5
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DOI: https://doi.org/10.1007/s40195-023-01609-5