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7 results on '"Becquart, C."'

1. Peculiar release kinetics of deuterium from polycrystalline tungsten revealed by a laser induced desorption technique: experiment and modeling

Author

Minissale, Marco, Hodille, E, Ghiorghiu, F, Markelj, S., Martin, Céline, Ferro, Y, Barthe, M.F., Becquart, C, Mougenot, Jonathan, ANGOT, Thierry, Grisolia, C, Gallais, Laurent, Bisson, Régis, Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), ILM (ILM), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Jozef Stefan Institute [Ljubljana] (IJS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Laboratoire des Sciences des Procédés et des Matériaux (LSPM), Université Paris 13 (UP13)-Institut Galilée-Université Sorbonne Paris Cité (USPC)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA), and Centre National de la Recherche Scientifique (CNRS)-Université Sorbonne Paris Cité (USPC)-Institut Galilée-Université Paris 13 (UP13)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

2. Influence of the specificities of ion irradiation on the nanostructural evolution in Fe alloys: an object kinetic Monte Carlo study

Author

Chiapetto, M., Malerba, L., Castin, N., Heintze, C., and Becquart, C. S.

Subjects
continuous irradiation, Physics::Medical Physics, ion irradiation, technology, industry, and agriculture, pulsed irradiation, kinetic Monte Carlo, Fe-Cr alloys
Abstract

This work investigates the nanostructural evolution under ion irradiation in both a binary Fe-C alloy and an Fe-9%Cr-C alloy at 300°C, using an object kinetic Monte Carlo model originally developed to simulate neutron irradiation in Fe-(Cr)-C alloys. We studied the effect of specificities of ion irradiation that are expected to have an impact on the evolution of radiation-induced defect clusters as compared to neutron irradiation. The most relevant impact is due to the difference in dose-rate between neutron and ion irradiation. Moreover, the effect of two different ion irradiation regimes (continuous versus pulsed) on the nanostructure evolution material was also investigated: the presence of Cr was seen to lead to a different response over accumulated dose, the reason having been identified in the defect cluster recombination mechanism.

Published
2017

3. Properties of vacancy clusters in FeMnNi alloys for the parameterization of OKMC models

Author

Messina, L., Chiapetto, M., Becquart, C., Domain, C., Olsson, P., Efsing, P., Malerba, L., CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etude de l'Energie Nucléaire (SCK-CEN), Université de Lille, Matériaux et Mécanique des Composants (EDF R&D MMC), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Department of Mathematics (KTH Royal Institute of Technology), Royal Institute of Technology [Stockholm] (KTH ), Vattenfall, European Project: 661913,H2020,NFRP-2014-2015,SOTERIA(2015), and European Project: 604862,EC:FP7:Fission,FP7-Fission-2013,MATISSE(2013)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], diffusion, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], kinetic Monte Carlo, defects
Abstract

International audience; This talk will present an investigation of the properties (stability and mobility) of vacancy clusters of varying size and composition in FeMnNi model alloys, performed by means of atomistic kinetic Monte Carlo (KMC) simulations. This study provides a necessary dataset for the implementation of object KMC simulations of long-term RPV microstructure evolution. The results show that Mn and Ni atoms considerably reduce the mobility of small vacancy clusters, which is shown in a parallel talk to be one of the key phenomena leading the microstructure evolution of irradiated FeMnNi model alloys and RPV steels.

Published
2016

4. Ab initio threshold displacement energies in iron

Author

Olsson, P., Becquart, C. S., and Domain, C.

Abstract

The threshold displacement energy in iron is determined using ab initio molecular dynamics. This is the most fundamental input parameter for radiation damage assessments. The predictions agree well with the available experiments and provide a significantly lower average value for iron than the standard one. This result impacts radiation damage assessments in iron alloys and steels and especially so for dose estimations and conditions close to the threshold. The importance of using an appropriate description of the core and valence electrons is highlighted. Energy loss simulations provide important fitting parameters for improved interatomic potentials. IMPACT STATEMENT Ground-breaking ab initio calculations of the threshold displacement energies in iron show significant differences in the angular anisotropy and predicted average value with respect to previous literature.

Published
2016
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5. Monte Carlo and molecular dynamics simulations of screw dislocation locking by Cottrell atmospheres in low carbon Fe-C alloys (vol 108, pg 19, 2015)

Author

Veiga, R. G. A., Goldenstein, H., Perez, Michel, Becquart, C. S., Matériaux, ingénierie et science [Villeurbanne] ( MATEIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)

Subjects
[ SPI.MAT ] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience

Published
2016

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