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Journal of Materials Science

, Volume 45, Issue 17, pp 4689–4695 | Cite as

Microstructure evolution through heavy compression aided by thermodynamic calculations

  • Farideh Hajiakbari
  • Mahmoud Nili-Ahmadabadi
  • Behrang Poorganji
  • Tadashi Furuhara
Ultrafine Grained Materials

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.

Keywords

Austenite Martensite Mechanical Energy Severe Plastic Deformation Habit Plane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

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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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Farideh Hajiakbari
    • 1
  • Mahmoud Nili-Ahmadabadi
    • 1
  • Behrang Poorganji
    • 2
  • Tadashi Furuhara
    • 2
  1. 1.School of Metallurgy and Materials EngineeringUniversity of TehranTehranIran
  2. 2.Institute for Materials ResearchTohoku UniversitySendaiJapan

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