Temperature hysteresis of the order-disorder transition in carbon-supersaturated α-Fe
MAUGIS, Philippe
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
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Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
MAUGIS, Philippe
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
< Reduce
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
Language
en
Article de revue
This item was published in
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2017-12, vol. 96, n° 21, p. 214104 - 214104
American Physical Society
English Abstract
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, ...Read more >
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.Read less <
ANR Project
Etude de la décomposition spinodale dans les aciers martensitiques Fe-X-C - ANR-13-BS08-0014
Origin
Hal imported