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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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Riesch, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Progress in the development of industrial scale tungsten fibre-reinforced composite materialscitations
- 2023Recrystallization and grain growth in single tungsten fiber-reinforced tungsten compositescitations
- 2022Recent progress in the assessment of irradiation effects for in-vessel fusion materials: tungsten and copper alloyscitations
- 2021Deuterium retention in tungsten fiber-reinforced tungsten compositescitations
- 2021Cyclic ring fiber textures in single tungsten fiber-reinforced tungsten compositescitations
- 2019Correlation of microstructural and mechanical properties of K-doped tungsten fibers used as reinforcement of tungsten matrix for high temperature applications
- 2019Correlation of microstructural and mechanical properties of K-doped tungsten fibers used as reinforcement of tungsten matrix for high temperature applications
- 2019Micromechanical and microstructural properties of tungsten fibers in the as-produced and annealed state: Assessment of the potassium doping effect
- 2019Micromechanical and microstructural properties of tungsten fibers in the as-produced and annealed state:Assessment of the potassium doping effect
- 2018Plastic deformation of recrystallized tungsten-potassium wires: Constitutive deformation law in the temperature range 22–600 °Ccitations
- 2017Plasma-wall interaction studies within the EUROfusion consortium: progress on plasma-facing components development and qualificationcitations
- 2017Plasma–wall interaction studies within the EUROfusion consortium: progress on plasma-facing components development and qualification
- 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
- 2016Properties of drawn W wire used as high performance fibre in tungsten fibre-reinforced tungsten compositecitations
- 2016Materials for DEMO and reactor applications-boundary conditions and new concepts
- 2015Influence of Ti 3 SiC 2 Fiber Coating on Interface and Matrix Cracking in an SiC Fiber-Reinforced Polymer-Derived Ceramiccitations
- 2013Recent progress in research on tungsten materials for nuclear fusion applications in Europecitations
- 2013Recent progress in research on tungsten materials for nuclear fusion applications in Europecitations
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article
Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatments
Abstract
Plastic deformation of tungsten wire is an effective source of toughening tungsten fibre-reinforced tungsten composites (Wf/W) and other tungsten fibre-reinforced composites. To provide a reference for optimization of those composites, unconstrained pure tungsten wire is studied after various heat treatments in terms of microstructure, mechanical behaviour and fracture mode. Recrystallization is already observed at a relatively low temperature of 1273 K due to the large driving force caused by a high dislocation density. Annealing for 30 min at 1900 K also leads to recrystallization, but causes a rather different microstructure. As-fabricated wire and wire recrystallized at 1273 K for 3 h show fine grains with a high aspect ratio and a substantial plastic deformability: a clearly defined tensile strength, high plastic work, similar necking shape, and the characteristic knife-edge-necking of individual grains on the fracture surface. While the wire recrystallized at 1900 K displays large, almost equiaxed grains with low aspect ratios as well as distinct brittle properties. Therefore, it is suggested that a high aspect ratio of the grains is important for the ductile behaviour of tungsten wire and that embrittlement is caused by the loss of the preferable elongated grain structure rather than by recrystallization. In addition, a detailed evaluation of the plastic deformation behaviour during tensile test gives guidance to the design and optimization of tungsten fibre-reinforced composites.