An improved model is presented for the formation of bainitic structures during isothermal heat treatment conditions. The model based on displacive mechanism consists of a new expression for the volume fraction of bainite as a function of time, incorporating a temperature and chemical composition-based expression for the number density of initial nucleation sites and limiting the volume fraction of bainite. The model has been validated with respect to experimental data of high- as well as low-carbon steels. It has been found that the isothermal transformation kinetics is well predicted for all steels.
A Model for Bainite Formation at Isothermal Heat Treatment Conditions
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received September 29, 2018; final manuscript received January 29, 2019; published online June 6, 2019. Assoc. Editor: Ziad Saghir.
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Sidhu, G., Srinivasan, S., and Bhole, S. (June 6, 2019). "A Model for Bainite Formation at Isothermal Heat Treatment Conditions." ASME. J. Thermal Sci. Eng. Appl. February 2020; 12(1): 011006. doi: https://doi.org/10.1115/1.4042861
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