| 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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Mocellin, Katia
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (55/55 displayed)
- 2022Influence of mechanical characterization on the prediction of necking issues during sheet flow forming processcitations
- 2022FEM Modelling of Weld Damage in Continuous Cold Rolling of MIG/MAG Butt-Welded Stainless Steel Stripscitations
- 2022FEM Modelling of Weld Damage in Continuous Cold Rolling of MIG/MAG Butt-Welded Stainless Steel Stripscitations
- 2022Numerical analysis of a backward flow forming operation of AA6061-T6 and comparison with experimentscitations
- 2022Identifying Heterogeneous Friction Coefficients on the Hot Forming Tools in Mannesmann Cross-Roll Piercingcitations
- 2021Numerical assessment of large hexagonal seamless steel tube extrusion feasibilitycitations
- 2019Numerical analysis of the complex loading path during tube flow forming processes
- 2018Hybrid parallel multigrid preconditioner based on automatic mesh coarsening for 3D metal forming simulationscitations
- 2018Modelling the strength of an aluminium-steel nailed jointcitations
- 2018New numerical approach for the modelling of machining applied to aeronautical structural parts
- 2017In-situ creep law determination for modeling Spark Plasma Sintering of TiAl 48-2-2 powdercitations
- 2017Linear Friction Welding of Aeronautical alloys Modeling and Numerical Simulation
- 2017Quantitative analysis of galling in cold forging of a commercial Al-Mg-Si alloycitations
- 2017Quantitative analysis of galling in cold forging of a commercial Al-Mg-Si alloycitations
- 2017In-situ Experiments to Determine the Creep Law Describing the SPS Densification of a TiAl Powder
- 2017Numerical modeling of electrical upsetting manufacturing processes based on Forge® environmentcitations
- 2017Numerical modeling of electrical upsetting manufacturing processes based on Forge® environmentcitations
- 2017Numerical simulation of linear friction welding of aeronautical alloyscitations
- 2017Numerical methods for linear friction welding simulation of aeronautical alloys
- 2017A Numerical Tool to Master the SPS Densification of TiAl Complex Shapes
- 2016Numerical modelling of ODS steel tube cold pilgered by HPTR. Focus on experimental measurements and simulation of residual stress.
- 2016Numerische Vorhersage der während der Zerspanung von großen luftfahrttechnischen Aluminiumbauteilen auftretenden Verzüge ; Numerical prediction of distortions during machining of large aluminium aeronautical partscitations
- 2016Numerische Vorhersage der während der Zerspanung von großen luftfahrttechnischen Aluminiumbauteilen auftretenden Verzügecitations
- 2016Numerical Modeling of Tube Forming by HPTR Cold Pilgering Processcitations
- 2016Numerical Modeling of Tube Forming by HPTR Cold Pilgering Processcitations
- 2016Influence of the machining sequence on the residual stress redistribution and machining quality: analysis and improvement using numerical simulationscitations
- 2015Numerical Modeling of Fuel Rod Resistance Butt Weldingcitations
- 2015Numerical prediction of distorsions during machining of large aluminum aeronautical parts
- 2014Experimental and Numerical Analysis of Electrical Contact Crimping to Predict Mechanical Strengthcitations
- 2013Numerical Modeling of Fuel Rod Resistance Butt Weldingcitations
- 2013Non standard samples behaviour law parameters determination by inverse analysis
- 2013Development of Adapted Material Testing for Cold Pilgering Process of ODS Tubescitations
- 2013Development of Adapted Material Testing for Cold Pilgering Process of ODS Tubescitations
- 2013Numerical Study of a Crimped Assembly Mechanical Strengthcitations
- 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
- 2012A simple approach for the modeling of an ODS steel mechanical behavior in pilgering conditionscitations
- 2012A simple approach for the modeling of an ODS steel mechanical behavior in pilgering conditionscitations
- 2011Modelling Of Residual Stresses Induced By High Speed Milling Processcitations
- 20112D high speed machining simulations using a new explicit formulation with linear triangular elementscitations
- 20112D high speed machining simulations using a new explicit formulation with linear triangular elementscitations
- 2011Finite Element Modeling and Optimization of Mechanical Joining Technologycitations
- 2011Identification of cyclic and anisotropic behaviour of ODS steels tubescitations
- 2011An enhanced Lemaitre model formulation for materials processing damage computationcitations
- 2010Computational modeling of electrical contact crimping and mechanical strength analysiscitations
- 2010An experimental study to determine electrical contact resistancecitations
- 2009Numerical life prediction of mechanical fatigue for hot forging toolscitations
- 2008A node-nested Galerkin multigrid method for metal forging simulationcitations
- 2008Explicit F.E. formulation with modified linear tetrahedral elements applied to high speed forming processescitations
- 2008Explicit F.E. formulation with modified linear tetrahedral elements applied to high speed forming processescitations
- 2007Modélisation de l'endommagement pour la simulation d'assemblages par déformation
- 2005A node-nested Galerkin multigrid method for metal forging simulation
- 2001Toward large scale FE computation of hot forging process using iterative solvers, parallel computation and multigrid algorithmscitations
- 2001Three dimensional finite element simulation of ring rolling
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.