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A Comparative Study on the High-Temperature Forming and Constitutive Modeling of Ti-6Al-4V

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Abstract

Ti-6Al-4V alloy is often preferred for high-performance components such as aerospace components due to its superior material properties and thermal resistance. In order to produce these components in the desired geometry, it is very important to determine the high-temperature thermomechanical properties of Ti-6Al-4V. In order to define these properties, uniaxial tensile tests at strain rates of 0.001, 0.01 and 0.1 s−1 at 700, 750 and 800 °C were applied in this study. In tests performed at a strain rate of 0.001 s−1 at 800 °C, an elongation at break above 0.8 representing a dominant ductile behavior is observed. It is clearly demonstrated that the initial 17.32% β phase reaches 31.02% at 800 °C, and the α grain size increases with temperature. Existence of dimples and voids in the fracture surfaces are an indicator of increased ductility behavior. In addition to the Modified Johnson–Cook model, which is widely used for modeling flow stress, the use of the extended Ludwik equation is suggested in this study. According to the correlation coefficient (R), it is claimed that the Extended Ludwik model is a more suitable approach for modeling the mechanical behavior for the studied forming temperature range.

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Acknowledgements

This study was supported by the Scientific and Technological Research Council of Turkey (Turkish Aerospace Industries-Yıldız Technical University 2244—Industrial PhD Fellowship Program/project number: 118C071) and the Scientific Research Program of Turkish Aerospace Industries. Partial support of the Ozyegin University Research Fund is also acknowledged.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Esenler, Istanbul, Turkey

    Murat Mert Uz & Afife Binnaz Hazar Yoruç

  2. Turkish Aerospace Industries, Fethiye Mahallesi, Kahramankazan, Ankara, Turkey

    Cahit Sertaç Aydoğan

  3. Mechanical Engineering Department, Ozyegin University, Istanbul, Turkey

    Guney Guven Yapici

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  1. Murat Mert Uz
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Uz, M.M., Hazar Yoruç, A.B., Aydoğan, C.S. et al. A Comparative Study on the High-Temperature Forming and Constitutive Modeling of Ti-6Al-4V. J. of Materi Eng and Perform 32, 4376–4390 (2023). https://doi.org/10.1007/s11665-022-07426-8

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