| Cite this article as: |
Yan Ma, Rui Zheng, Ziyuan Gao, Ulrich Krupp, Hai-wen Luo, Wenwen Song, and Wolfgang Bleck, Multiphase-field simulation of austenite reversion in medium-Mn steels, Int. J. Miner. Metall. Mater., 28(2021), No. 5, pp. 847-853. https://doi.org/10.1007/s12613-021-2282-6
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Medium-Mn steels have attracted immense attention for automotive applications owing to their outstanding combination of high strength and superior ductility. This steel class is generally characterized by an ultrafine-grained duplex microstructure consisting of ferrite and a large amount of austenite. Such a unique microstructure is processed by intercritical annealing, where austenite reversion occurs in a fine martensitic matrix. In the present study, austenite reversion in a medium-Mn alloy was simulated by the multiphase-field approach using the commercial software MICRESS® coupled with the thermodynamic database TCFE8 and the kinetic database MOBFE2. In particular, a faceted anisotropy model was incorporated to replicate the lamellar morphology of reversed austenite. The simulated microstructural morphology and phase transformation kinetics (indicated by the amount of phase) concurred well with experimental observations by scanning electron microscopy and in situ synchrotron high-energy X-ray diffraction, respectively.
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