Abstract
The kinetics of diffusional transformations in steels depend on a large number of parameters, such as grain geometry, nucleation behavior, and growth kinetics. An essential step in the process is the lattice transformation, the kinetics of which can be expressed by the mobility of the interface between the matrix and the newly forming phase. To study the intrinsic mobility of the austenite-ferrite interface, i.e., the mobility of the interface in the absence of long-range diffusion, differential thermal analysis (DTA) experiments were performed on high-purity dilute Fe-Co and Fe-Cu alloys. The data obtained were analyzed using a three-dimensional geometry, based on a tetrakaidecahedron model for the austenite grain and a recent interface mobility model. The observed transformation behavior is described accurately, with the interface mobility being composition dependent.
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Vooijs, S.I., van Leeuwen, Y., Sietsma, J. et al. On the mobility of the austenite-ferrite interface in Fe-Co and Fe-Cu. Metall Mater Trans A 31, 379–385 (2000). https://doi.org/10.1007/s11661-000-0274-0
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DOI: https://doi.org/10.1007/s11661-000-0274-0