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Effect of Magnetic State of Austenite on Thermodynamics and Kinetics of Martensitic Transformation in Steel

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Based on the analysis of the magnetic state of austenite, changes in thermodynamics and kinetics of the martensitic transformation in carbon steel have been determined. Depending on the strength of the external magnetic field, the dimensions of the magnetic inhomogeneity regions in austenite were calculated. It was shown that with an increase in the field strength, the size and the quantity of such regions increase. Changes in free energy of austenite, caused by the appearance of ferromagnetic order fluctuations, have been determined. The free energy of formation of one ferromagnetic cluster in austenite was estimated. Changes in the energy of formation and diameter of the critical martensite nucleus were analyzed depending on the strength of the external magnetic field. Data about an increase in the volumetric martensite transformation rate under the exposure to a magnetic field were obtained.

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Correspondence to Yu. V. Dolgachev.

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Translated from Metallurg, Vol. 66, No. 10, pp. 63–69, October 2022. Russian https://doi.org/10.52351/00260827_2022_10_63.

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Dolgachev, Y., Pustovoit, V.N., Egorov, M.S. et al. Effect of Magnetic State of Austenite on Thermodynamics and Kinetics of Martensitic Transformation in Steel. Metallurgist 66, 1248–1256 (2023). https://doi.org/10.1007/s11015-023-01438-y

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  • DOI: https://doi.org/10.1007/s11015-023-01438-y

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