Titre :

Dislocation electron tomography: A technique to characterize the dislocation microstructure evolution in zirconium alloys under irradiation

Auteur(s) :

Mussi, Alexandre [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Onimus, Fabien [Auteur]
CEA- Saclay [CEA]

Titre de la revue :

Acta Materialia

Numéro :

213

Pagination :

116964

Éditeur :

Elsevier BV

Date de publication :

2021-07

ISSN :

1359-6454

Mot(s)-clé(s) en anglais :

Dislocation
Tomography
Irradiation
Helix
Loops

Discipline(s) HAL :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Planète et Univers [physics]/Sciences de la Terre

Résumé en anglais : [en]

Diffraction-contrast electron tomography was used to analyse the 3D geometry of the dislocation microstructure in a zirconium alloy before and after ion irradiation. The material had been strained at room temperature prior ...
Lire la suite >Diffraction-contrast electron tomography was used to analyse the 3D geometry of the dislocation microstructure in a zirconium alloy before and after ion irradiation. The material had been strained at room temperature prior to irradiation. After straining, the material exhibited mainly screw dislocations with <a> Burgers vectors. From the analysis of the habit plane of <a> dislocations with non-screw segments, it was deduced that they have glided mainly in the prismatic planes and to a lesser extent in the first order pyramidal planes. After irradiation, dislocation loops with <a> Burgers vectors were observed. It was shown that the loops are not pure edge and have their habit plane located around the planes {10-10}, tilted up to 20° towards the planes (0001) and {11-20}. Furthermore, it was proven that the initial screw dislocations have climbed under irradiation. Several dislocations were also found to have interacted with loops during climb. The climb of <a> dislocations under irradiation is an important mechanism that can explain part of the in-reactor deformation of zirconium alloys when subjected to simultaneous mechanical loading and irradiation. Interactions between dislocations and loops occurring during dislocation climb may also play a significant role on the in-reactor deformation of zirconium alloys.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet Européen :

Rheology of Earth materials: closing the gap between TIMEscales in the laboratory and in the MANtle

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Plasticité

Date de dépôt :

2021-05-26T18:17:44Z
2021-06-08T13:48:17Z