| 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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Pantleon, Wolfgang
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2024Tungsten fiber-reinforced tungsten composites and their thermal stabilitycitations
- 2024Dislocation structure evolution during metal additive manufacturingcitations
- 2024Microstructure of additive manufactured materials for plasma-facing components of future fusion reactorscitations
- 2023High-resolution reciprocal space mapping reveals dislocation structure evolution during 3D printingcitations
- 2023Recrystallization and grain growth in single tungsten fiber-reinforced tungsten compositescitations
- 2023Thermal stability of differently rolled pure tungsten plates in the temperature range from 1125°C to 1250°Ccitations
- 2022Grain growth in thin film under strong temperature gradientscitations
- 2022Separation of XRD peak profiles in single-phase metals with bimodal grain structure to analyze stress partitioningcitations
- 2022Separation of XRD peak profiles in single-phase metals with bimodal grain structure to analyze stress partitioningcitations
- 2021Microstructural evolution in single tungsten fiber-reinforced tungsten composites during annealing: recrystallization and abnormal grain growthcitations
- 2020Microstructure characterization in individual texture components by X-ray line profile analysis:Principles of the X-TEX method and practical application to tensile-deformed textured Ticitations
- 2020Microstructure Characterization in Individual Texture Components by X-Ray Line Profile Analysis: Principles of the X-TEX Method and Practical Application to Tensile-Deformed Textured Ticitations
- 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
- 2019Monitoring microstructural evolution in-situ during cyclic loading with high-resolution reciprocal space mappingcitations
- 2019Through analysis of the microstructure changes during linear friction welding of the near-α titanium alloy Ti-6Al-2Sn-4Zr-2Mo (Ti6242) towards microstructure optimizationcitations
- 2019Monitoring microstructural evolution in-situ during cyclic loading with high-resolution reciprocal space mapping:Papercitations
- 2018Multi-scale and multi-technic microstructure analysis of a linear friction weld of the metastable-β titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti17) towards a new Post-Weld Heat Treatmentcitations
- 2018Isothermal annealing of thin rolled tungsten plates in the temperature range from 1300 °C to 1400 °Ccitations
- 2018Multi-scale and multi-technic microstructure analysis of a linear friction weld of the metastable-beta titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti17) towards a new Post-Weld Heat Treatmentcitations
- 2017Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatmentscitations
- 2017Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatmentscitations
- 2017Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel:crystallographic structure and interface with ferrite matrixcitations
- 2016Microstructural Analysis of Orientation-Dependent Recovery and Recrystallization in a Modified 9Cr-1Mo Steel Deformed by Compression at a High Strain Ratecitations
- 2015Kinetics of individual grains during recrystallization of cold-rolled coppercitations
- 2015Thermal stability of a highly-deformed warm-rolled tungsten plate in the temperature range 1100 °C to 1250 °Ccitations
- 2014Non-equilibrium grain boundaries in titanium nanostructured by severe plastic deformation: Computational study of sources of material strengtheningcitations
- 2014Direct observation of grain boundary migration during recrystallization within the bulk of a moderately deformed aluminium single crystalcitations
- 2014Recrystallization kinetics of warm-rolled tungsten in the temperature range 1150-1350 °Ccitations
- 2014High-Resolution Reciprocal Space Mapping for Characterizing Deformation Structurescitations
- 2013Work-hardening stages and deformation mechanism maps during tensile deformation of commercially pure titaniumcitations
- 2012Compression behavior of a ferritic-martensitic Cr-Mo steel
- 2011Work softening in nanocrystalline materials induced by dislocation annihilationcitations
- 2010Texture evolution during tensile necking of copper processed by equal channel angular extrusioncitations
- 2010In situ measurements of X-ray peak profile asymmetry from individual grainscitations
- 2007Investigation of the deformation structure in an aluminium magnesium alloy by high angular resolution three-dimensional X-ray diffractioncitations
- 2002First Joint Chinese-Danish Symposium: Characterisation of Microstructures. Extended abstracts
Places of action
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article
The brittle-to-ductile transition in cold-rolled tungsten sheets: On the loss of room-temperature ductility after annealing and the phenomenon of 45° embrittlement
Abstract
The high brittle-to-ductile transition (BDT) temperature of conventionally produced tungsten (W), challenges the design of W-based structural components. Recent studies have demonstrated the potential of cold rolling to produce W sheets, which are ductile at room temperature and exhibit a BDT temperature of 208 K. In order to assess the thermal stability of these materials, we conducted isothermal heat treatments (at 1300 K, for annealing durations between 0.1 h and 210 h) combined with studies on the evolution of mechanical properties and microstructure of a severely deformed undoped W sheet. With this work, we demonstrate the need for a stabilized microstructure before utilization of cold-rolled W in high-temperature applications can take place successfully. After annealing at 1300 K for 6 h, the material properties changed remarkably: The BDT temperature increases from 208 K to 473 K and the sharp BDT of the as-rolled condition transforms into a wide transition regime spanning over more than 200 K. This means in fact, an endangered structural integrity at room temperature. We also address the so-called phenomenon of 45° embrittlement of W sheets. Here we show that cleavage fracture in strongly textured W sheets always takes place with an inclination angle of 45° to the rolling direction, independent of the studied material condition, whether as-rolled or annealed. An in-depth study of the microstructure indicates a correlation between an increased BDT temperature caused by annealing and microstructural coarsening presumably by extended recovery. We conclude that 45° embrittlement needs to be comprehended as a combined effect of an increased spacing between grain boundaries along the crack front, leading to an increased BDT, and a high orientation density of the rotated cube component or texture components close to that, which determine the preferred crack propagation of 45° to the rolling direction.