A coupled multiphase-field and carbon diffusion model for lower bainitic transformation
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A multiphase-field method coupled to a Cahn-Hilliard diffusion model is pre- sented in this paper. The underlying thermodynamic framework is based on the concept of generalized stresses. A prototype model is developed to simulate the lower bainitic transformation, including phase transitions, the separation of carbon within the supersat- urated phase and the precipitation of carbides. The system of partial differential equa- tions is solved with the finite element method. Numerical results of the model showing the qualitative mechanism are discussed.