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Investigation of Microstructural Uniformity During Isothermal Forging of Ti-6Al-4V

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Abstract

The effect of strain on microstructural changes and the primary alpha (αP) volume fraction as well as the workability of Ti-6Al-4V are studied by isothermal compression of wedge-shaped specimens at the initial temperatures of 850, 900, and 950 °C and platen velocities of 2.5, 25, and 250 mm/min in combination with finite element method. The results show that higher platen velocity leads to a lesser αP volume fraction at all of the temperatures. Higher temperature reduces the αP volume fraction, but increases the impact of strain and platen velocity on the microstructure through the specimen. A more uniform distribution of the primary alpha volume fraction can be achieved by decreasing the initial temperature and/or platen velocity. All of the specimens were free from any defects and can withstand a compression with the normalized Cockcroft-Latham damage value of 0.61.

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Acknowledgment

The financial support for this work was partially provided by MAPNA Group under Grant No. RD-THD-91-05 which is appreciated.

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Authors and Affiliations

  1. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

    S. Javid Mirahmadi & Mohsen Hamedi

  2. School of Material and Metallurgical Engineering, College of Engineering, University of Tehran, Tehran, Iran

    Mohammad Habibi Parsa

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  1. S. Javid Mirahmadi
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  3. Mohammad Habibi Parsa
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Correspondence to S. Javid Mirahmadi.

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Mirahmadi, S.J., Hamedi, M. & Habibi Parsa, M. Investigation of Microstructural Uniformity During Isothermal Forging of Ti-6Al-4V. J. of Materi Eng and Perform 23, 4411–4420 (2014). https://doi.org/10.1007/s11665-014-1221-3

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  • DOI: https://doi.org/10.1007/s11665-014-1221-3

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