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Monte Carlo Simulations for Bcc Alloys Under Irradiation: Phase Stability and Microstructural Evolutions

Published online by Cambridge University Press:  16 February 2011

F. Soisson ,
P. Bellon ,
A. Barbu  and
G. Martin
F. Soisson
Affiliation:
CEA, DECM-SRMP, CE de Saclay, 91191 Gif-sur-Yvette, France
P. Bellon
Affiliation:
CEA, DECM-SRMP, CE de Saclay, 91191 Gif-sur-Yvette, France
A. Barbu
Affiliation:
CEA, DECM-SESI, Ecole Polytechnique, 91128 Palaiseau, France
G. Martin
Affiliation:
CEA, DECM-SRMP, CE de Saclay, 91191 Gif-sur-Yvette, France
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Abstract

When a compound is maintained in far for equilibrium configurations by nuclear collisionsunder irradiation, the steady-state properties of the system can no longer be predicted from equilibrium thermodynamics. Here we propose Monte Carlo simulations for addressing the question of phase stability under irradiation. They are based on a kinetic model with two dynamics acting in parallel: thermally activated jumps of vacancies and ballistic events induced by nuclear collisions. Two transformations are studied: the A2-B2 order-disorder transition and the precipitation of copper in iron. In the former case a shift from second to first order of the A2-B2 transition, predicted by the model, has been experimentally checked by I MeV electron irradiations of a FeA1 alloy. In the latter case, the precipitation kinetics are determined by Monte Carlo simulations and are found to be in very good agreement with available experimental data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 373: Symposium Y – Microstructure of Irradiated Materials , 1994 , 89
Copyright
Copyright © Materials Research Society 1995

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References

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