Influence of ordering phenomena on carbon segregation in tungsten screw dislocation
| Autor: | F. Berthier, B. Legrand |
|---|---|
| Přispěvatelé: | Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Service de recherches de métallurgie physique (SRMP), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Polymers and Plastics
Metals and Alloys Ceramics and Composites Segregation Phase separation [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Dislocation Order [CHIM.MATE]Chemical Sciences/Material chemistry Carbon Tungsten Electronic Optical and Magnetic Materials Phase transition |
| Zdroj: | Acta Materialia Acta Materialia, 2023, 245, pp.118610. ⟨10.1016/j.actamat.2022.118610⟩ |
| ISSN: | 1359-6454 |
| Popis: | International audience; Concentration profiles on the different sites of tungsten screw dislocation are calculated as a function of the nominal carbon atom concentration, temperature and dislocation density. Rigid lattice Monte Carlo simulations and associated mean-field modelling are performed based on interaction energies from ab initio calculations. We show that the repulsive interactions induce ordering phenomena that drastically change the concentration in the core of the dislocation and leads to ordered structures among the octahedral sites. We detail the domains of short-range ordering (SRO) and long-range ordering (LRO). |
| Databáze: | OpenAIRE |
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