Abstract
Since previous equations fail to predict M S temperature of high carbon ferrous alloys, we first propose an equation for prediction of M S temperature of ferrous alloys containing > 2 wt pct C. The presence of carbides (Fe3C and Cr-rich M 7C3) is thermodynamically considered to estimate the C concentration in austenite. Especially, equations individually specialized for lean and high Cr alloys very accurately reproduce experimental results. The chemical driving force for martensitic transformation is quantitatively analyzed based on the calculation of T 0 temperature.
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The authors (JP and JHS) at KIST acknowledge the support from the KIST Institutional Program. SJL appreciates the financial support by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B03935163).
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Manuscript submitted September 4, 2017.
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Park, J., Shim, JH. & Lee, SJ. New Equation for Prediction of Martensite Start Temperature in High Carbon Ferrous Alloys. Metall Mater Trans A 49, 450–454 (2018). https://doi.org/10.1007/s11661-017-4436-8
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DOI: https://doi.org/10.1007/s11661-017-4436-8