In situ observation of strained bands and ductile damage in thin AA2139-T3 alloy sheets

Ante Buljac 1, 2 Thibault Taillandier-Thomas 1 Thilo Morgeneyer 2 Lukas Helfen 3, 4 Stéphane Roux 1 François Hild 1
1 LMT - Laboratoire de Mécanique et Technologie
2 MAT - Centre des Matériaux
3 ESRF - European Synchrotron Radiation Facility
4 ANKA - Institute for Photon Science and Synchrotron Radiation
Abstract : The interactions between plasticity and damage mechanisms are not clearly established concerning the fracture of ductile sheet materials (e.g., flat to slant transition). The question addressed herein is to elucidate which mechanism is responsible for localized phenomena leading to the final failure. A mechanical test carried out on a notched plate made of 2139-T3 aluminum alloy is imaged thanks to synchrotron laminography at micrometer resolution. Ductile damage (i.e., void nucleation, growth and coalescence) is analyzed via reconstructed volumes. Although the low volume fraction of secondary phases in the tested alloy is challenging, digital volume correlation is also utilized to measure displacement fields and estimate strain fields in the bulk of the alloy during the whole test. In the first part of this study, the resolution of the measurement technique is assessed under such conditions. Then strained bands are shown to occur very early on in what will be the slant region of the fracture path. Conversely, damage grows at very late loading steps.
Keywords : Digital Volume Correlation Damage Laminography Plasticity Flat-to-slant transition
Type de document :
Article dans une revue
Procedia IUTAM, cElsevier, 2017, 20, pp.66-72. 〈10.1016/j.piutam.2017.03.009〉
Liste complète des métadonnées

Littérature citée [36 références]  Voir  Masquer  Télécharger
https://hal-mines-paristech.archives-ouvertes.fr/hal-01518925
Contributeur : Bibliothèque Umr7633 <>
Soumis le : vendredi 5 mai 2017 - 15:46:43
Dernière modification le : lundi 12 novembre 2018 - 11:05:14
Document(s) archivé(s) le : dimanche 6 août 2017 - 16:03:11

Fichier

Buljac-Taillandier-Morgeneyer ...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

ENSMP | PARISTECH | ENSMP_MAT | ENS-CACHAN | INSTITUT-TELECOM | PSL | UNIV-PARIS-SACLAY

Citation

Ante Buljac, Thibault Taillandier-Thomas, Thilo Morgeneyer, Lukas Helfen, Stéphane Roux, et al.. In situ observation of strained bands and ductile damage in thin AA2139-T3 alloy sheets. Procedia IUTAM, cElsevier, 2017, 20, pp.66-72. 〈10.1016/j.piutam.2017.03.009〉. 〈hal-01518925〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

449

Téléchargements de fichiers

64

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD