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Hot Salt Stress Corrosion Cracking Study of Selective Laser Melted Ti-6Al-4V Alloy

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Abstract

The hot salt stress corrosion cracking (HSSCC) behavior of the selectively laser melted (SLM) Ti-6Al-4V alloy in the as-built and heat-treated conditions was studied at 300 and 400 °C. The HSSCC resistance of very susceptible as-built alloy can be significantly increased through annealing at 750 °C, losing only a small amount of ultimate tensile strength (UTS). The improvement in the HSSCC resistance is brought out by a transformation of martensite into lamellar α + β. The absence of equiaxed α found in the wrought alloy seems to help in increasing the HSSCC resistance of SLM Ti-6Al-4V alloy at high strength level.

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Acknowledgments

The authors thank Dr. Rajkumar Singh, Senior Director, KCTI- Bharat Forge Ltd for providing the SLM manufactured Ti-6Al-4V alloy for this study.

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Author notes

  1. Mangesh D. Pustode

    Present address: Center for Research, Engineering and Advance Technology, Minda Industries Ltd., Pune, 411026, India

Authors and Affiliations

  1. Kalyani Center for Technology and Innovation, Bharat Forge Ltd., Pune, 411036, India

    Mangesh D. Pustode & Bharat S. Padekar

  2. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Purnendu Chakraborty, Shweta Shukla & V. S. Raja

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  1. Mangesh D. Pustode
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Correspondence to V. S. Raja.

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This invited article is part of a special topical focus in theJournal of Materials Engineering and Performance on Additive Manufacturing. The issue was organized by Dr. William Frazier, Pilgrim Consulting, LLC; Mr. Rick Russell, NASA; Dr. Yan Lu, NIST; Dr. Brandon D. Ribic, America Makes; and Caroline Vail, NSWC Carderock.

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Pustode, M.D., Chakraborty, P., Padekar, B.S. et al. Hot Salt Stress Corrosion Cracking Study of Selective Laser Melted Ti-6Al-4V Alloy. J. of Materi Eng and Perform 30, 5323–5332 (2021). https://doi.org/10.1007/s11665-021-05774-5

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