Accéder directement au contenu Accéder directement à la navigation
Communication dans un congrès

Quantitative investigation of brittle out-of-plane fracture in X70 pipeline steel

Abstract : Brittle out-of-plane cracking (by delamination or brittle tilted fracture) affects the impact toughness of pipeline steels. It has been investigated on notched tensile specimens using a local approach to fracture. Smooth and notched bars taken along four directions (including the short transverse direction, ND) have been tested in tension at temperatures between 20 °C and -196 °C. Delamination partly results from the lower value of the critical cleavage stress along ND, linked to the microtexture anisotropy, but also from the presence of ductile microcracks acting as stress concentrators triggering fracture along the rolling plane. Brittle tilted fracture was associated to a relatively lower value of the critical cleavage stress in that plane, but prior delamination was necessary to trigger it. The relevance of a macroscopic critical stress criterion for delamination is finally discussed.
Type de document :
Communication dans un congrès
Liste complète des métadonnées

Littérature citée [6 références]  Voir  Masquer  Télécharger

https://hal-mines-paristech.archives-ouvertes.fr/hal-01053645
Contributeur : Bibliothèque Umr7633 <>
Soumis le : jeudi 31 juillet 2014 - 16:56:13
Dernière modification le : mercredi 14 octobre 2020 - 03:52:47
Archivage à long terme le : : mardi 11 avril 2017 - 19:09:47

Fichier

Tankoua-CrA_pin-Thibaux_Proced...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Citation

Franck Tankoua, Jérôme Crépin, Philippe Thibaux, Steven Cooreman, Anne-Françoise Gourgues-Lorenzon. Quantitative investigation of brittle out-of-plane fracture in X70 pipeline steel. 20th European conference on fracture (ECF 20), Jun 2014, Trondheim, Norway. pp.1149-1154, ⟨10.1016/j.mspro.2014.06.187⟩. ⟨hal-01053645⟩

Partager

Métriques

Consultations de la notice

372

Téléchargements de fichiers

539