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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Colas, Kimberly
CEA Saclay
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2022Environmental degradation of nuclear materials: the use of advanced characterization techniques to understand physical and chemical phenomena
- 2021Impact of ion and neutron irradiation on the corrosion of the 6061-T6 aluminium alloy ; Influence de l'irradiation par ions et neutrons sur la corrosion de l'alliage d'aluminium 6061-T6citations
- 2021Impact of the microstructure on the swelling of aluminum alloys: characterization and modelling basescitations
- 2021Impact of ion and neutron irradiation on the corrosion of the 6061-T6 aluminium alloycitations
- 2020Effects of temperature and pH on uniform and pitting corrosion of aluminium alloy 6061-T6 and characterisation of the hydroxide layerscitations
- 2020Effects of temperature and pH on uniform and pitting corrosion of aluminium alloy 6061-T6 and characterisation of the hydroxide layers ; Effet de la température et du pH sur la corrosion de l'alliage d'Al 6061-T6 et caractérisation des couches d'oxydescitations
- 2019Correlation between quenching rate, mechanical properties and microstructure in thick sections of Al Mg Si( Cu) alloyscitations
- 2019Effect of hardening on toughness captured by stress-based damage nucleation in 6061 aluminum alloycitations
- 2018Understanding of Corrosion Mechanisms after Irradiation: Effect of Ion Irradiation of the Oxide Layers on the Corrosion Rate of M5citations
- 2018Study of the influence of the initial pH on the aqueous corrosion of an Al-Mg-Si alloy at 70°C
- 2018Effect of ion irradiation of the metal matrix on the oxidation rate of Zircaloy-4citations
- 2018Microstructure Evolution in Ion-Irradiated Oxidized Zircaloy-4 Studied with Synchrotron Radiation Microdiffraction and Transmission Electron Microscopycitations
- 2017Stability of β″ nano-phases in Al-Mg-Si(-Cu) alloy under high dose ion irradiationcitations
- 2016Identification of monoclinic θ-phase dispersoids in a 6061 aluminium alloycitations
- 2015Influence of light ion irradiation of the oxide layer on the oxidation rate of Zircaloy-4citations
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article
Effect of hardening on toughness captured by stress-based damage nucleation in 6061 aluminum alloy
Abstract
International audience ; A deterioration of fracture toughness, especially of the tearing modulus, with aging time and associated strength increase is observed for aluminum 6061 and reproduced here numerically thanks to a stress-based damage nucleation criterion.A correlative multiscale analysis by scanning electron microscopy, atom probe tomography as well as 3D X-ray laminography shows that coarse particles and the characteristic damage mechanisms do not depend on aging time: the fracture mechanism is typically ductile and transgranular as shown by electron backscatter diffraction analysis of sections of compact tension specimens containing interrupted cracks. Large Mg2Si inclusions fracture at very low plastic strain, and defects nucleate at large (Fe,Si)-rich inclusions with increasing plastic deformation. Only the hardening nanoprecipitation increases with aging time: aging favors the precipitation of nm-size Mg2Si precipitates which causes hardening of the matrix so that damage nucleation at coarse inclusions becomes easier - thus leading to a decrease in toughness. Indeed, larger clusters and a substantially higher area fraction of iron based intermetallic particles are found on the fracture surfaces of the longest aging time CT samples compared to the shortest aging time samples.Based on these observations, a Gurson-Tvergaard Needleman type model is proposed to simulate the tearing tests using Finite Elements. It uses damage nucleation kinetics which depend on the maximum principal stress, since a classical strain-based nucleation is not sufficient to reproduce the deterioration of the tearing modulus.