Phase-Field Modeling for Intercritical Annealing of a Dual-Phase Steel
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A phase-field model has been developed to describe microstructure evolution during intercritical annealing of a commercial DP600 dual-phase steel. The simulations emphasize the interaction between ferrite recrystallization and austenite formation from a cold-rolled pearlite/ferrite microstructure at high heating rates. The austenite-ferrite transformations are assumed to occur under conditions where only carbon partitions between the phases by long-range diffusion. A solute drag model has been integrated with the phase-field model to describe the effect of substitutional alloying elements on the migration of the ferrite/austenite interface. Experimental results including recrystallization and transformation kinetics as well as austenite morphology have been successfully described by carefully adjusting both the austenite nucleation scenario and the interface mobilities.
KeywordsFerrite Austenite Pearlite Intercritical Annealing Austenite Formation
The authors are grateful to the Natural Sciences and Engineering Research Council of Canada (NSERC) and ArcelorMittal Dofasco Inc. for their financial support. They thank W.J. Poole and M. Kulakov for many stimulating discussions.
- 3.D. Bombac, M.J. Peet, S. Zenitani, S. Kimura, T. Kurimura, and H.K.D.H. Bhadeshia: Model. Simul. Mater. Sci. Eng., 2014, vol. 22, p. 045005(14).Google Scholar
- 7.H. Azizi-Alizamini, M. Militzer, and W.J. Poole: Metall. Mater. Trans. A, 2010, vol. 42A, pp. 1544–57.Google Scholar
- 10.M. Kulakov: Ph.D. Thesis, University of British Columbia, Vancouver, Canada, 2013.Google Scholar
- 11.I. Steinbach and F. Pezzolla: Phys. Nonlinear Phenom.., 1999, vol. 134 (4), pp. 385–93.Google Scholar
- 12.J. Eiken, B. Böttger, and I. Steinbach: Phys. Rev. E, 2006, vol. 73 (6), p. 066122(9).Google Scholar
- 13.B. Zhu and M. Militzer: Model. Simul. Mater. Sci. Eng., 2012, vol. 20 (8), p. 085011(17).Google Scholar
- 15.M. Kulakov: The University of British Columbia, Vancouver, Canada, Private Communication, 2014.Google Scholar