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Effect of Crystallographic Orientation on the Formation of α-Case in Ti-6Al-4V Titanium Alloy

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Abstract

The α-casing is a well-known phenomenon during the heat treatment of Ti-6Al-4V alloys. This work investigates the role of crystallographic orientation on α-case thickness. Specimens were heat-treated below the β-transus temperature followed by air cooling in a vacuum and air medium. The microstructural analysis revealed that the crystallographic orientation significantly influences the α-case thickness. {0001} Plane resists the oxygen diffusion and results in a relatively thin α-case formation which is also confirmed by microhardness variation.

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Acknowledgments

The authors wish to thank the Advanced Mechanical Testing Facility (AMTF) and Microstructural Mechanics and Micro-forming (MMMF) Lab for providing the equipment support for the mechanical testing and microstructural evaluations.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Suravi Sarkar, Anish Ranjan & Sushil K. Mishra

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  1. Suravi Sarkar
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  2. Anish Ranjan
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  3. Sushil K. Mishra
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Correspondence to Sushil K. Mishra.

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Sarkar, S., Ranjan, A. & Mishra, S.K. Effect of Crystallographic Orientation on the Formation of α-Case in Ti-6Al-4V Titanium Alloy. Metall Mater Trans A (2024). https://doi.org/10.1007/s11661-024-07397-6

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