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A phase-field investigation of the effect of grain-boundary diffusion on austenite to ferrite transformation
Bhattacharya A., Mondal K., Sangal S.,
Published in Elsevier B.V.
Volume: 173
We study the transformation of austenite to ferrite under the influence of Grain-Boundary (GB) diffusion. In order to simulate identical level of penetration of solute through GB as predicted by theory, diffusivity gradient at the boundary of a bulk austenitic domain is calibrated by numerical simulations. Applying a phase-field model for mixed-mode of transformation, it has been found that GB allotriomorph has a constant lengthening rate and the sharp tip of the allotriomorph displaces carbon due to its curvature. The accumulated solute has a significant effect on the thickening behaviour in terms of growth coefficient and exponent. We also discuss the morphological evolution of ‘perturbed’ allotriomorphic ferrite. © 2019 Elsevier B.V.
About the journal
JournalData powered by TypesetComputational Materials Science
PublisherData powered by TypesetElsevier B.V.
Open AccessNo