Cavitation at triple nodes in α-zirconium polycrystals - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Acta Materialia Année : 1996

Cavitation at triple nodes in α-zirconium polycrystals

Résumé

The damage mechanisms of α-zirconium polycrystals in tension at room temperature and their dependence on texture and grain size are investigated. Ductile damage proceeds by growth of cavities appearing at triple nodes; at larger strain, other cavities nucleate at precipitate platelets. The cavitation kinetics depend on the tension direction; they are lower the coarser the grains. For a better understanding of the cavity formation at triple nodes, the internal stress field due to intergranular plastic incompatibility is estimated. The mean stress exhibits a logarithmic singularity on the triple junction. By combining this property with some experimentally determined features of the cavity growth (tubular shape along the c axis and growth by activation of prismatic glide), a crystallographic orientation-dependent cavitation criterion is derived. The determination of the grains orientation by the E.B.S.D. technique leads to a satisfactory comparison of the model predictions with the observations.
Fichier principal
Vignette du fichier
Care1996.pdf (1.39 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-00111516 , version 1 (06-02-2023)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

Citer

Sabine Caré, André Zaoui. Cavitation at triple nodes in α-zirconium polycrystals. Acta Materialia, 1996, 44 (4), pp.1323-1336. ⟨10.1016/1359-6454(95)00302-9⟩. ⟨hal-00111516⟩
145 Consultations
8 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More