| 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
Optimization and limitations of known DEMO divertor concepts
Abstract
ISFNT 10, international symposium on fusion nuclear technology, 11-16 Sept. 2011, Portland, Oregon Oral presentation Karlsruhe Institute of Technology, Institute for Applied Materials, P.O. Box 3640, 76021 Key words: DEMO divertor, cooling of the coolant, jet impingement, water cooling, annealing In this work we will introduce and discuss improvements for two types of DEMO divertors based on known designs: (i) gas cooled designs and (ii) liquid coolant concepts. In a first step, the advantages and disadvantages of gas cooling as well as the necessityof a jet impingement to increase the heat transfer coefficients will be discussed. Further discussion deals with the pros and cons of liquid coolant concepts, like for example, liquid metal or water cooling. Thereafter, we will present two rather contrary DEMO divertor concepts which are based on today’s knowledge on refractory materials science, fabrication and joining technology. The first design is based on the known helium cooling concept using jet impingement. Drawbacks of the actual He-cooled divertor design are small scale parts as well as the necessary high helium inlet temperature of about 800°C which leads to the question: How can we deal with such high helium temperatures? This paper shows a solution for large scale components as well as a new thermal management for the helium outlet gas that we call ‘cooling of the coolant’.The second improved concept uses water flowing through steel pipes, typically made of Eurofer steel. It is well known that using Eurofer at low temperatures is critical due to its severe embrittlement under neutron irradiation. Here we will make a proposal how it could be possible to use the Eurofer steel anyway: The solution could consist in a limited operation period followed by an annealing cycle at 550°C for a few hours during any maintenance shut down phases. Finally,a special transition from the steel pipes to the tungsten monoblocks will be described. This is important to reduce the load resulting from the mismatch of the thermal expansion coefficients. Both concepts are discussed in terms of materials selection due to material limits, joining technology, thermal management, and simulation with a special focus on the material issue using already existing and available materials.