| People | Locations | Statistics |
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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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Toualbi, Louise
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Grain size sensitive modelling of the nonlinear behaviour and fatigue damage of Inconel 718 superalloycitations
- 2023Modeling of the shot peening of a nickel alloy with the consideration of both residual stresses and work hardening ; Modélisation du grenaillage de précontrainte d'un alliage de nickel avec la prise en compte des contraintes résiduelles et de l'écrouissagecitations
- 2023Microstructure and mechanical properties of a laser powder bed fused Al-Fe alloy
- 2023Assesment of different additive manufacturing routes for repair: comparison of liquid-phase and solid-state material deposition processes ; Evaluation de différentes voies de fabrication additive pour la réparation : comparaison des procédés de dépôt de matériaux en phase liquide et a l'état solide
- 2022Microstructure, plasticity and ductility of a TNM + alloy densified by Spark Plasma Sintering ; Microstructure, plasticité et ductilité d'un alliage TNM+ densifié par frittage SPScitations
- 2022Microstructure, Plasticity and Ductility of a TNM+ Alloy Densified by Spark Plasma Sinteringcitations
- 2022Plasticity and brittleness of the ordered beta-0 phase in a TNM-TiAl alloy ; Plasticité et fragilité de la phase βo ordonnée dans un alliage TNM-TiAlcitations
- 2022Interplay between solidification microsegregation and complex precipitation in a γ/γ' cobalt-based superalloy elaborated by Directed Energy Deposition ; Interaction entre la microségrégation de solidification et la précipitation complexe dans un superalliage à base de cobalt γ/γ' élaboré par dépôt d'énergie dirigéecitations
- 2020Cyclic deformation of TiAl generic microstructures at room and high temperature: Bauschinger effect & strain rate sensitivity ; Etude de la déformation des microstructures génériques des alliages TiAl sous sollicitation cyclique à température ambiante et haute température : effet Bauschinger et viscositécitations
- 2013Relationships between mechanical behavior and microstructural evolutions in Fe 9Cr-ODS during the fabrication route of SFR cladding tubescitations
- 2013Macroscopic and Microscopic Determinations of Residual Stresses in Thin Oxide Dispersion Strengthened Steel Tubescitations
- 2012Assessment of a new fabrication route for Fe-9Cr-1W ODS cladding tubescitations
- 2012Finite element simulation of cold pilgering of ODS tubes
- 2012Finite element simulation of cold pilgering of ODS tubes
- 2012Optimization of the Fabrication Route of Ferritic/Martensitic ODS Cladding Tubes: Metallurgical Approach and Pilgering Numerical Modeling
Places of action
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conferencepaper
Optimization of the Fabrication Route of Ferritic/Martensitic ODS Cladding Tubes: Metallurgical Approach and Pilgering Numerical Modeling
Abstract
Oxide Dispersion Strengthened ferritic/martensitic alloys are developed as prospective cladding materials for future Sodium-Cooled-Fast-Reactors (GEN IV). These advanced alloys present a good resistance to irradiation and a high creep rupture strength due to a reinforcement by the homogeneous dispersion of hard nano-sized particles (such as Y2O3 or YTiO). ODS alloys are elaborated by powder metallurgy, consolidated by hot extrusion and manufactured into cladding tube using the pilger cold-rolling process. ODS alloys present low ductility and high hardness at room temperature which complicate their manufacturing as tubes. Moreover extrusion and rolling processes induce strong crystallographic and morphological anisotropies. The manufacturing by means of cold rolling passes implies intermediate softening heat treatments. Fabrication route optimization is needed to ensure a safe manufacturing and reduce the cladding tube anisotropy. A better understanding of the deformation paths, the behavior laws and the metallurgy of ODS materials is required. This paper presents the studies conducted on the optimization of the fabrication routes of the new ferritic / martensitic ODS tubes fabricated at CEA. Two main ODS alloys are considered, a Fe-9Cr-1W-Ti-Y2O3 ODS martensitic steel and a Fe-14Cr-1W-Ti-Y2O3 ODS ferritic alloy. The numerical simulation of the cold pilgering process leads to the determination of the strain path undegone by a material point. The determination of the ODS constitutive law and the development of the numerical model allow calculating the stress triaxiality during the process. A systematic analysis of all strokes helps defining which stroke could contribute mainly to the oligocyclic fatigue of the materials. The predicted residual stress state results in longitudinal and ortho-radial tensile stresses. Those results are discussed regarding the possible crack initiation and the subsequent propagation in the formed tube. In parallel to the numerical developments conducted to ensure the formability of the material, an optimization of the heat treatments is conducted with the objective of releasing internal stresses and reducing the stored energy. The 9Cr-ODS steel presents a phase transformation from ferrite to austenite which allows reducing the tube hardness. Manufacturing through two different fabrication routes allows comparing the effects of annealing temperature on cold-workability, microstructure evolution and mechanical properties. Microstructure control of 14Cr-ODS alloy, which does not present a phase transformation, is more complex and the control of the recrystallization microstructure appears critical. Different examples are shown and discussed.