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Article Dans Une Revue Metallurgical and Materials Transactions A Année : 2013

Self-Consistent Model for Planar Ferrite Growth in Fe-C-X Alloys

Résumé

A self-consistent model for non-partitioning planar ferrite growth from alloyed austenite is presented. The model captures the evolution with time of interfacial contact conditions for substitutional and interstitial solutes. Substitutional element solute drag is evaluated in terms of the dissipation of free energy within the interface, and an estimate is provided for the rate of buildup of the alloying element "spike" in austenite. The transport of the alloying elements within the interface region is modeled using a discrete-jump model, while the bulk diffusion of C is treated using a standard continuum treatment. The model is validated against ferrite precipitation and decarburization kinetics in the Fe-Ni-C, Fe-Mn-C, and Fe-Mo-C systems.

Domaines

Matériaux

Dates et versions

hal-00869671 , version 1 (03-10-2013)

Identifiants

Citer

H.S. Zurob, D. Panahi, C.R. Hutchinson, Y. Brechet, G.R. Purdy. Self-Consistent Model for Planar Ferrite Growth in Fe-C-X Alloys. Metallurgical and Materials Transactions A, 2013, 44A (8), pp.3456-3471. ⟨10.1007/s11661-012-1479-8⟩. ⟨hal-00869671⟩
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