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Microstructure evolution through heavy compression aided by thermodynamic calculations

  • Ultrafine Grained Materials
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Abstract

The induced martensite transformation in a dual-phase bainitic ferrite–austenite steel during heavy compression was studied by thermodynamic computations. Compression tests were conducted at temperatures of 298 and 573 K on the rectangle samples at the strain rate of 0.001 s−1. The samples were deformed to 40 and 70% of their original thickness. It was found that 70% compression of the steel at room temperature resulted in transformation of retained austenite to martensite, which is in agreement with thermodynamic calculations. Additionally, heavy compression resulted in the formation of fine grains with high angle grain boundaries which confirms grain refinement.

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Acknowledgements

The authors would like to express their thanks to the Iran National Science Foundation for financial support of this research and also thank Dr. Parsa for fruitful discussions.

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Authors and Affiliations

  1. School of Metallurgy and Materials Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran

    Farideh Hajiakbari & Mahmoud Nili-Ahmadabadi

  2. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan

    Behrang Poorganji & Tadashi Furuhara

Authors
  1. Farideh Hajiakbari
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  2. Mahmoud Nili-Ahmadabadi
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  3. Behrang Poorganji
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  4. Tadashi Furuhara
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Correspondence to Mahmoud Nili-Ahmadabadi.

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Hajiakbari, F., Nili-Ahmadabadi, M., Poorganji, B. et al. Microstructure evolution through heavy compression aided by thermodynamic calculations. J Mater Sci 45, 4689–4695 (2010). https://doi.org/10.1007/s10853-010-4305-y

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  • DOI: https://doi.org/10.1007/s10853-010-4305-y

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