Prediction of Martensite Start Temperature for Lightweight Fe–Mn–Al–C Steels

Zhang, Rui; Zheng, Weisen; Veys, Xavier; Huyberechts, Guido P. J.; Springer, Hauke; Selleby, Malin

doi:10.1007/s11669-018-0660-1

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Prediction of Martensite Start Temperature for Lightweight Fe–Mn–Al–C Steels

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Springer, Hauke
Combinatorial Metallurgy and Processing, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Zhang, R., Zheng, W., Veys, X., Huyberechts, G. P. J., Springer, H., & Selleby, M. (2018). Prediction of Martensite Start Temperature for Lightweight Fe–Mn–Al–C Steels. Journal of Phase Equilibra and Diffusion, 1-14. doi:10.1007/s11669-018-0660-1.

Cite as: https://hdl.handle.net/21.11116/0000-0001-E848-9

Abstract

A tailor-made thermodynamic database of the Fe-Mn-Al-C system was developed using the CALPHAD approach. The database enables predicting phase equilibria and thereby assessing the resulting microstructures of Fe-Mn-Al-C alloys. Available information on the martensite start (Ms) temperature was reviewed. By employing the Ms property model in the Thermo-Calc software together with the new thermodynamic database and experimental Ms temperatures, a set of model parameters for the Fe-Mn-Al-C system in the Ms model was optimised. Employing the newly evaluated parameters, the calculated Ms temperatures of the alloys in the Fe-Mn-Al-C system were compared with the available measured Ms temperatures. Predictions of Ms temperatures were performed for the alloys, Fe-10, 15 and 20 wt. Mn-xAl-yC. The predictability of the Ms model can be further validated when new experimental Ms temperatures of the Fe-Mn-Al-C system are available. © 2018, The Author(s).