| 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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Rieth, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (58/58 displayed)
- 2024Additive manufacturing of novel complex tungsten components via electron beam melting: Basic properties and evaluation of the high heat flux behavior
- 2024In-Situ synchrotron investigation of elastic and tensile properties of oxide dispersion strengthened EUROFER97 steel for advanced fusion reactorscitations
- 2024Hydrogen diffusion and trapping in a cryogenic processed high-Cr ferrous alloy
- 2024Tungsten alloys R&D program at KIT
- 2023Microstructural insights into EUROFER97 batch 3 steels
- 2023Effect of neutron irradiation on tensile properties of advanced Cu-based alloys and composites developed for fusion applications
- 2022Effect of neutron irradiation on ductility of tungsten foils developed for tungsten-copper laminates
- 2022Effect of neutron irradiation on ductility of tungsten foils developed for tungsten-copper laminatescitations
- 2022Recent progress in the assessment of irradiation effects for in-vessel fusion materials: tungsten and copper alloyscitations
- 2021Microstructure and precipitation behavior of advanced RAFM steels for high-temperature applications on fusion reactorscitations
- 2021Impact of materials technology on the breeding blanket design – Recent progress and case studies in materials technologycitations
- 2021Technological Processes for Steel Applications in Nuclear Fusion
- 2021Additive manufacturing technologies for EUROFER97 components
- 2021Impact of materials technology on the breeding blanket design Recent progress and case studies in materials technologycitations
- 2020Elucidating the microstructure of tungsten composite materials produced by powder injection molding
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: the rate-limiting mechanism of plasticity controlling the BDT in ultrafine-grained tungstencitations
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: On the loss of room-temperature ductility after annealing and the phenomenon of 45° embrittlementcitations
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: On the loss of room-temperature ductility after annealing and the phenomenon of 45° embrittlementcitations
- 2020The brittle-to-ductile transition in cold-rolled tungsten sheets: Contributions of grain and subgrain boundaries to the enhanced ductility after pre-deformation
- 2019Manufacturing, high heat flux testing and post mortem analyses of a W-PIM mock-upcitations
- 2019Long-term stability of the microstructure of austenitic ODS steel rods produced with a carbon-containing process control agent
- 2019Mechanical properties and microstructure characterization of Eurofer97 steel variants in EUROfusion program
- 2019High pulse number thermal shock testing of tungsten alloys produced by powder injection moldingcitations
- 2018Expanding the operation window of RAFM steels by optimized chemical compositions and heat treatments
- 2018Expanding the operation window of RAFM steels by optimized chemical compositions and heat treatments
- 2017Processing of complex near-net-shaped tungsten parts by PIM
- 2017Ductilisation of tungsten (W): Tungsten laminated compositescitations
- 2017Production, microstructure and mechanical properties of two different austenitic ODS steelscitations
- 2017Assessment of industrial nitriding processes for fusion steel applicationscitations
- 2017Plasma exposure of tungsten in the linear plasma device PSI-2 produced via powder injection molding
- 2017Rapid material development and processing of complex near-net-shaped parts by PIM
- 2015Improvement of RAFM steels through thermo-mechanical treatments
- 2015Mechanical and microstructural investigations of tungsten and doped tungsten materials produced via powder injection moldingcitations
- 2014Microstructural anisotropy of ferritic ODS alloys after different production routes
- 2014Virtuelle Material- und Prozessentwicklung am Beispiel der Konstrukturausbildung in Schweißnähten
- 2011Optimization and limitations of known DEMO divertor concepts
- 2011TEM study of mechanically alloyed ODS powder
- 2011Review on the EFDA programme on tungsten materials
- 2011Influence of thickness and notch on impact bending properties of pure tungsten plate material
- 2011Development of high performance materials for nuclear fusion power plants
- 2010Cost effective fabrication of a fail-safe first wall
- 2010Fracture behavior of tungsten materials and the impact on the divertor design in nuclear fusion power plants
- 2010Tungsten materials for structural divertor applications
- 2009Fe-Cr-V ternary alloy-based ferritic steels for high- and low-temperature applications
- 2008Diffusion weld study for test blanket module fabrication
- 2008Impact bending tests on selected tungsten materials
- 2008Fracture behaviour of tungsten materials depending on microstructure and surface fabrication
- 2008Mechanical properties of different refractory materials for nuclear fusion applications
- 2007Specific welds for test blanket modules
- 2005Present development status of EUROFER and ODS-EUROFER for application in blanket concepts
- 2005A steady-state creep model for the AISI 316 L(N) in the technically relevant stress range
- 2005Evaluation of the mechanical properties of W and W-1%La₂O₃ in view of divertor applications
- 2005Creep and recrystallization of pure and dispersion strengthened tungsten
- 2005A comprising steady-state creep model for the austenitic AISI 316 L(N) steel
- 2005Microstructure and mechanical properties of different EUROFER welds
- 2005Assessment of different welding techniques for joining EUROFER blanket components
- 2005Verification and validation experiments for atomistic modeling of FeCr alloys
- 2004Creep of the austenitic steel AISI 316 L(N). Experiments and models
Places of action
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document
Microstructure and mechanical properties of different EUROFER welds
Abstract
| ---|--- EUROMAT 2005 Prague, 5-9 September 2005 In contrast to austenitic steels untreated welded joints of ferritic-martensitic steels like EUROFER suffer from hardening and embrittlement due to uncontrolled martensite formation in the weld and from softening in the vicinity of the heat affecting zones. With respect to specific Test Blanket Module (TBM) design and assembly requirements for DEMO there is a significant discrepancy between the necessary post welding heat treatment and its applicability. Therefore, Tungsten-Inert-Gas (TIG) with EUROFER filler wire, Electron Beam (EB), and Laser welding have been applied to EUROFER plates in the condition as received. Prior to specimen fabrication the microstructure of the different welds have been investigated. Both TIG welds show coarse grain formation which is typical for solidification micro structures that form during the welding cycles. Both beam welds dont show this severe grain coarsening. Also typical for TIG welds are the softened regions in the HAZ as can be seen from the hardness profiles. While the lateral extensions of the beam welds are significantly smaller, softening in the HAZ cannot be observed here. From these microstructural examinations it is already clear that TIG welds need a full two-step heat treatment (austenitization plus annealing) in order to recover a uniform distributed fine grain. This was also confirmed by poor charpy test results. But charpy tests on beam welded specimens have shown surprisingly good results, even without post-weld heat treatment. Compared to the EUROFER base material, the Ductile-to-Brittle-Transition-Temperature (DBTT) of Laser and EB welds is almost comparable. Further assets and drawbacks of these different welding technologies are discussed in detail based on tensile and charpy tests performed on welds with and without applied post-welding heat treatments. The examinations were completed by according microstructural examinations. 280 words