| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Olier, Patrick
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2021Effect of Aging Heat Treatment at 400-600°C on the Microstructure and Tensile Properties of 15Cr-15Ni Ti-Stabilized Steel Cladding
- 2021Numerical assessment of large hexagonal seamless steel tube extrusion feasibilitycitations
- 2021Effect of aging heat treatment at 400-600°C on the microstructure and tensile properties of 15Cr-15Ni Ti-stabilized steel cladding
- 2020Loss of ductility in optimized austenitic steel at moderate temperature: A multi-scale study of deformation mechanismscitations
- 2019Fabrication and characterization of 15Cr-15Ni austenitic steel cladding tubes for sodium fast reactors
- 2018Fabrication and characterization of 15Cr-15Ni austenitic steel cladding tubes for sodium fast reactors
- 2017Singularities of tensile behavior of advanced austenitic steels obtained by different cold processes
- 2015Comparison of 15Cr-15Ni Austenitic Steel Cladding Tubes Obtained by HPTR Cold Pilgering or by Cold Drawingcitations
- 2015Comparison of 15Cr-15Ni austenitic steel cladding tubes obtained by HPTR cold pilgering or by cold drawingcitations
- 2013Relationships between mechanical behavior and microstructural evolutions in Fe 9Cr-ODS during the fabrication route of SFR cladding tubescitations
- 2013Microstructure and Properties of a Three-Layer Nuclear Fuel Cladding Prototype Containing Erbium as a Neutronic Burnable Poisoncitations
- 2012Assessment of a new fabrication route for Fe-9Cr-1W ODS cladding tubescitations
- 2012Optimization of the Fabrication Route of Ferritic/Martensitic ODS Cladding Tubes: Metallurgical Approach and Pilgering Numerical Modeling
- 2011Effect of interfacial oxidation occurring during the duplex process combining surface nanocrystallisation and co-rolling
- 2009High Strength Nanocrystallized Multilayered Structure Obtained by Smat and Co-rollingcitations
- 2008Microstructural and Cold Workability Assessment of a New ODS Ferritic Steelcitations
- 2008Combination of the SMA-treatment and the co-rolling process for the production of a nanostructured composite structure
- 2007Comportement mécanique d'une structure multicouche obtenue par co- laminage de tôles nanostructurées par SMAT
Places of action
| Organizations | Location | People |
|---|
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.