Metallurgical and Materials Transactions A

, Volume 47, Issue 8, pp 3873–3881 | Cite as

Phase Field Modeling of Cyclic Austenite-Ferrite Transformations in Fe-C-Mn Alloys

  • Hao ChenEmail author
  • Benqiang Zhu
  • Matthias Militzer


Three different approaches for considering the effect of Mn on the austenite-ferrite interface migration in an Fe-0.1C-0.5Mn alloy have been coupled with a phase field model (PFM). In the first approach (PFM-I), only long-range C diffusion is considered while Mn is assumed to be immobile during the phase transformations. Both long-range C and Mn diffusions are considered in the second approach (PFM-II). In the third approach (PFM-III), long-range C diffusion is considered in combination with the Gibbs energy dissipation due to Mn diffusion inside the interface instead of solving for long-range diffusion of Mn. The three PFM approaches are first benchmarked with isothermal austenite-to-ferrite transformation at 1058.15 K (785 °C) before considering cyclic phase transformations. It is found that PFM-II can predict the stagnant stage and growth retardation experimentally observed during cycling transformations, whereas PFM-III can only replicate the stagnant stage but not the growth retardation and PFM-I predicts neither the stagnant stage nor the growth retardation. The results of this study suggest a significant role of Mn redistribution near the interface on reducing transformation rates, which should, therefore, be considered in future simulations of austenite-ferrite transformations in steels, particularly at temperatures in the intercritical range and above.


Ferrite Austenite Austenite Formation Interface Mobility Stagnant Stage 
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.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2016

Authors and Affiliations

  1. 1.Key Laboratory for Advanced Materials of Ministry of Education, School of Materials Science and EngineeringTsinghua UniversityBeijingChina
  2. 2.Centre for Metallurgical Process EngineeringThe University of British ColumbiaVancouverCanada

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