Abstract
The growth of allotriomorphic ferrite from austenite in Fe-C-X alloys is studied. Two systems have been selected: the Fe-C-Ni system, in which the substitutional alloying element is expected to have a weak interaction with both the C and the moving interface, and the Fe-C-Mo system, in which these interactions are expected to be non-negligible. The ferrite growth kinetics was measured using two types of experiments: classical isothermal heat treatments and decarburization experiments. All of the experimental observations can be quantitatively rationalized using a model that describes an evolution in interfacial conditions from paraequilibrium (PE) to local equilibrium with negligible partitioning (LENP) during growth.
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This article is based on a presentation made in the “Hillert Symposium on Thermodynamics & Kinetics of Migrating Interfaces in Steels and Other Complex Alloys,” December 2–3, 2004, organized by the The Royal Institute of Technology in Stockholm, Sweden.
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Hutchinson, C.R., Zurob, H.S. & Bréchet, Y. The growth of ferrite in Fe-C-X alloys: The role of thermodynamics, diffusion, and interfacial conditions. Metall Mater Trans A 37, 1711–1720 (2006). https://doi.org/10.1007/s11661-006-0114-y
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DOI: https://doi.org/10.1007/s11661-006-0114-y