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Effect of Hot Deformation on Texture and Microstructure in Fe-Mn Austenitic Steel During Compression Loading

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Abstract

Hot compression tests of a new high-Mn austenitic steel were carried out at deformation temperatures of 700, 800, 900, and 1000 °C under strain rate of 0.01 s−1. The hot deformation behavior was investigated by the analyses of flow curves, texture, and deformed microstructures. Microstructures of the deformed specimens and macrotexture were examined using electron backscatter diffraction and x-ray diffraction methods, respectively. The results showed that the flow stress depended strongly on the deformation temperature and decreased by increasing deformation temperature. The microstructural evidence indicated that the dynamic recrystallization (DRX) process of experimental steel was initiated at 800 °C with necklace structure. The volume fraction of DRX grains was considerably increased by increasing deformation temperature to 1000 °C. Texture of the DRX grains tended to become a weak texture and was associated with the formation of Goss and R-Cube components. Meanwhile, martensitic transformation was detected in the hot-deformed austenite. The martensitic transformation was the most difficult in the DRX grains because of the effect of small grain size. The tendency of transformation was decreased after compression at 1000 °C.

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Acknowledgments

M. Eskandari is grateful to Professor Jerzy Szpunar for financial support to conduct this research.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

    M. Eskandari

  2. Steel Research Center, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

    M. Eskandari

  3. Department of Mechanical Engineering, University of Bonab, Velayat Highway, Bonab, Iran

    M. A. Mohtadi-Bonab

  4. Hot Deformation and Thermo-Mechanical Processing of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran

    A. Zarei-Hanzaki

  5. Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

    S. M. Fatemi

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  1. M. Eskandari
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  2. M. A. Mohtadi-Bonab
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  3. A. Zarei-Hanzaki
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  4. S. M. Fatemi
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Correspondence to M. A. Mohtadi-Bonab.

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Eskandari, M., Mohtadi-Bonab, M.A., Zarei-Hanzaki, A. et al. Effect of Hot Deformation on Texture and Microstructure in Fe-Mn Austenitic Steel During Compression Loading. J. of Materi Eng and Perform 27, 1555–1569 (2018). https://doi.org/10.1007/s11665-018-3273-2

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  • DOI: https://doi.org/10.1007/s11665-018-3273-2

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