A new scenario for ‹c› vacancy loop formation ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
A new scenario for ‹c› vacancy loop formation in zirconium based on atomic-scale modeling
Auteur(s) :
Christiaen, Benjamin [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Domain, Christophe [Auteur]
Matériaux et Mécanique des Composants [EDF R&D MMC]
Thuinet, Ludovic [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ambard, A. [Auteur]
Matériaux et Mécanique des Composants [EDF R&D MMC]
Legris, Alexandre [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations - UMR 8207 [UMET]
Domain, Christophe [Auteur]
Matériaux et Mécanique des Composants [EDF R&D MMC]
Thuinet, Ludovic [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ambard, A. [Auteur]
Matériaux et Mécanique des Composants [EDF R&D MMC]
Legris, Alexandre [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Titre de la revue :
Acta Materialia
Nom court de la revue :
Acta Materialia
Pagination :
93-106
Éditeur :
Elsevier BV
Date de publication :
2019-10
ISSN :
1359-6454
Mot(s)-clé(s) en anglais :
Zirconium;Dislocation loop;DFT;Elasticity;Stacking fault pyramids
Discipline(s) HAL :
Chimie/Matériaux
Résumé en anglais : [en]
The growth of zirconium alloys under irradiation is a phenomenon experimentally identified and associated with the development beyond a threshold dose of dislocation loops with vacancy character having a Burgers vector ...
Lire la suite >The growth of zirconium alloys under irradiation is a phenomenon experimentally identified and associated with the development beyond a threshold dose of dislocation loops with vacancy character having a Burgers vector with a component parallel to the c axis. In this work, by combining atomic simulations (DFT and empirical potential) and continuous modeling, we show that prismatic stacking fault pyramids or bipyramids whose base rests on the basal plane of the hcp structure are likely precursors to the formation of ‹c› vacancy loops. In other words, these would not be formed by progressive accretion of vacancies but rather by collapse of the pyramids or bipyramids beyond a certain size. This mechanism could explain the fact that the ‹c› vacancy loops are never observed below a size of the order of 10 nm and their appearance at high fluence.Lire moins >
Lire la suite >The growth of zirconium alloys under irradiation is a phenomenon experimentally identified and associated with the development beyond a threshold dose of dislocation loops with vacancy character having a Burgers vector with a component parallel to the c axis. In this work, by combining atomic simulations (DFT and empirical potential) and continuous modeling, we show that prismatic stacking fault pyramids or bipyramids whose base rests on the basal plane of the hcp structure are likely precursors to the formation of ‹c› vacancy loops. In other words, these would not be formed by progressive accretion of vacancies but rather by collapse of the pyramids or bipyramids beyond a certain size. This mechanism could explain the fact that the ‹c› vacancy loops are never observed below a size of the order of 10 nm and their appearance at high fluence.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
INRA
ENSCL
CNRS
INRA
ENSCL
Collections :
Équipe(s) de recherche :
Métallurgie Physique et Génie des Matériaux
Date de dépôt :
2020-02-13T15:35:05Z
2020-02-28T15:57:07Z
2020-02-28T15:57:07Z