Convection-Induced Compositional Patterning ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Convection-Induced Compositional Patterning at Grain Boundaries in Irradiated Alloys
Auteur(s) :
Bouobda Moladje, G. F. [Auteur]
University of Illinois at Urbana-Champaign [Urbana] [UIUC]
Averback, R. S. [Auteur]
University of Illinois at Urbana-Champaign [Urbana] [UIUC]
Bellon, P. [Auteur]
University of Illinois at Urbana-Champaign [Urbana] [UIUC]
Thuinet, Ludovic [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
University of Illinois at Urbana-Champaign [Urbana] [UIUC]
Averback, R. S. [Auteur]
University of Illinois at Urbana-Champaign [Urbana] [UIUC]
Bellon, P. [Auteur]
University of Illinois at Urbana-Champaign [Urbana] [UIUC]
Thuinet, Ludovic [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Titre de la revue :
Physical Review Letters
Nom court de la revue :
Phys. Rev. Lett.
Numéro :
131
Éditeur :
American Physical Society (APS)
Date de publication :
2023-08-01
Discipline(s) HAL :
Chimie/Matériaux
Résumé en anglais : [en]
We consider the stability of precipitates formed at grain boundaries (GBs) by radiation-induced segregation in dilute alloys subjected to irradiation. The effects of grain size and misorientation of symmetric-tilt GBs are ...
Lire la suite >We consider the stability of precipitates formed at grain boundaries (GBs) by radiation-induced segregation in dilute alloys subjected to irradiation. The effects of grain size and misorientation of symmetric-tilt GBs are quantified using phase field modeling. A novel regime is identified where, at long times, GBs are decorated by precipitate patterns that resist coarsening. Maps of the chemical Péclet number indicate that arrested coarsening takes place when solute advection dominates over thermal diffusion right up to the precipitate-matrix interface, preventing interfacial local equilibrium and overriding capillary effects. This contrasts with liquid-solid mixtures where convection always accelerates coarsening.Lire moins >
Lire la suite >We consider the stability of precipitates formed at grain boundaries (GBs) by radiation-induced segregation in dilute alloys subjected to irradiation. The effects of grain size and misorientation of symmetric-tilt GBs are quantified using phase field modeling. A novel regime is identified where, at long times, GBs are decorated by precipitate patterns that resist coarsening. Maps of the chemical Péclet number indicate that arrested coarsening takes place when solute advection dominates over thermal diffusion right up to the precipitate-matrix interface, preventing interfacial local equilibrium and overriding capillary effects. This contrasts with liquid-solid mixtures where convection always accelerates coarsening.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
INRAE
ENSCL
CNRS
INRAE
ENSCL
Collections :
Équipe(s) de recherche :
Métallurgie Physique et Génie des Matériaux
Date de dépôt :
2023-12-20T18:19:55Z
2023-12-22T09:07:36Z
2023-12-22T09:07:36Z