MAUGIS, Philippe; DANOIX, F.; ZAPOLSKY, Helena; CAZOTTES, Sophie; GOUNÉ, Mohamed

doi:10.1103/PhysRevB.96.214104

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MAUGIS, Philippe
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]

DANOIX, F.
Groupe de physique des matériaux [GPM]

ZAPOLSKY, Helena
Groupe de physique des matériaux [GPM]

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Ce document a été publié dans

Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2017-12, vol. 96, n° 21, p. 214104 - 214104

American Physical Society

Résumé en anglais

Although many works have been devoted to the order-disorder transition in carbon-supersaturated α-Fe, all seem to have overlooked the temperature hysteresis phenomenon occurring around the critical temperature. It is shown, from a mean-field model based on the elasticity theory of point defects, that the origin of the temperature hysteresis is thermodynamic. As a consequence, both the critical temperature and carbon concentration for the order-disorder transition can be defined upon heating and cooling. The results obtained were successfully compared to molecular dynamics simulations, and are evidence that the transition is of first order and that linear elasticity is the predominant source of the thermodynamics of the Fe-C solid solutions.< Réduire

DOI

http://dx.doi.org/10.1103/PhysRevB.96.214104

Project ANR

Etude de la décomposition spinodale dans les aciers martensitiques Fe-X-C - ANR-13-BS08-0014

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Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026