Convection-Induced Compositional Patterning ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Convection-Induced Compositional Patterning at Grain Boundaries in Irradiated Alloys
Author(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
Journal title :
Physical Review Letters
Abbreviated title :
Phys. Rev. Lett.
Volume number :
131
Publisher :
American Physical Society (APS)
Publication date :
2023-08-01
HAL domain(s) :
Chimie/Matériaux
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
INRAE
ENSCL
CNRS
INRAE
ENSCL
Collections :
Research team(s) :
Métallurgie Physique et Génie des Matériaux
Submission date :
2023-12-20T18:19:55Z
2023-12-22T09:07:36Z
2023-12-22T09:07:36Z