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dc.contributor.author
Tancogne-Dejean, Thomas
dc.contributor.author
Roth, Christian C.
dc.contributor.author
Morgeneyer, Thilo F.
dc.contributor.author
Helfen, Lukas
dc.contributor.author
Mohr, Dirk
dc.date.accessioned
2021-01-11T12:05:40Z
dc.date.available
2021-01-10T03:41:29Z
dc.date.available
2021-01-11T12:05:40Z
dc.date.issued
2021-02-15
dc.identifier.issn
1359-6454
dc.identifier.other
10.1016/j.actamat.2020.116556
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/460888
dc.identifier.doi
10.3929/ethz-b-000460888
dc.description.abstract
The mechanisms leading to fracture of aluminum alloy AA2024-T3 under shear loading are investigated via X-ray synchrotron laminography. A 1mm-thick flat double-gage section shear specimen is loaded inside a synchrotron X-ray beamline. The microscale defects population is reconstructed on six loading steps as well as on the broken specimen. The material exhibits an initial void volume fraction of 0.7% as well as a high concentration of large Cu-rich intermetallic particles. Using 2D Digital Image Correlation of projected volume data, based on the void contrast, it is possible to track the evolution of both types of mesoscale defects throughout the loading and to correlate the deformation mechanisms with the local strains. Upon mechanical loading, pre-existing voids rotate and elongate following the deformation of the aluminum matrix. The intermetallic particles fail at early loading stages in a brittle manner, leading to the nucleation of voids normal to the maximum principal stress direction. The newly-created voids continue to grow during the subsequent loading steps impeded by the fragmented particles, eventually forming micro-cracks. A fracture mechanism is proposed based on these observations and assessed with a representative volume element simulation, pointing towards the formation of a shear localization band during the final loading step.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
In situ
en_US
dc.subject
Synchrotron radiation computed tomography
en_US
dc.subject
Aluminum alloy
en_US
dc.subject
Ductile fracture
en_US
dc.subject
Shear
en_US
dc.title
Ductile damage of AA2024-T3 under shear loading: Mechanism analysis through in-situ laminography
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-12-16
ethz.journal.title
Acta Materialia
ethz.journal.volume
205
en_US
ethz.journal.abbreviated
Acta Mater
ethz.pages.start
116556
en_US
ethz.size
16 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02622 - Institut für virtuelle Produktion / Institute of Virtual Manufacturing::09473 - Mohr, Dirk / Mohr, Dirk
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02622 - Institut für virtuelle Produktion / Institute of Virtual Manufacturing::09473 - Mohr, Dirk / Mohr, Dirk
ethz.date.deposited
2021-01-10T03:41:43Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-11T12:05:49Z
ethz.rosetta.lastUpdated
2021-02-15T23:06:09Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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