Microstructure evolution through heavy compression aided by thermodynamic calculations
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.
KeywordsAustenite Martensite Mechanical Energy Severe Plastic Deformation Habit Plane
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.
- 1.Iranpour Mobarake M, Nili-Ahmadabadi M, Poorganji B, Fatehi A, Shirazi H, Furuhara T, Habibi Parsa M, Hossein Nedjad S (2008) Mater Sci Eng A 491(1–2):172Google Scholar
- 11.Xie J, Zhu Y, Wang X (2000) J Mater Sci Technol 16:449Google Scholar
- 12.Nili-Ahmadabadi M, Hajiakbari F, Rad F, Karimi Z, Iranpour M, Poorganji B, Furuhara T (2010) J Nanosci Nanotechnol 10Google Scholar
- 13.Nili-Ahmadabadi M, Hajiakbari F, Poorganji B, Furuhara T (2010) Acta MaterGoogle Scholar
- 14.Dieter GE (1988) In: Rosa I (ed) Mechanical metallurgy. McGraw-Hill, New York, pp 43–72Google Scholar
- 17.Bell T, Owen WS (1967) Trans Met Soc AIME 239:1940Google Scholar
- 21.Porter DA, Easterling KE (1986) Diffusionless transformation. Phase transformations in metals and alloys. Van Nostrand Reinhold, Berkshire, p 388Google Scholar