Prediction of Martensite Start Temperature for Lightweight Fe-Mn-Al-C Steels |
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| Authors: | Rui Zhang Weisen Zheng Xavier Veys Guido Huyberechts Hauke Springer Malin Selleby |
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| Affiliation: | 1.Department of Materials Science and Engineering,KTH Royal Institute of Technology,Stockholm,Sweden;2.School of Materials Science and Engineering,Shanghai University,Shanghai,People’s Republic of China;3.Onderzoekscentrum voor Aanwending van Staal OCAS NV,Zelzate,Belgium;4.Flamac, a division of SIM, vzw,Zwijnaarde,Belgium;5.Max-Planck-Institut für Eisenforschung GmbH,Düsseldorf,Germany |
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| 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. |
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