| 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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Bruns, Sebastian
Technical University of Darmstadt
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Mechanical softening of CuX alloys at elevated temperatures studied via high temperature scanning indentationcitations
- 2024Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocationscitations
- 2024A simple way to make tough diamond/metal laminates
- 2024Bioinspired damage tolerant diamond-metal laminates by alternating CVD and PVD processes
- 2024Tailoring the Mechanical Properties of Metaluminous Aluminosilicate Glasses by Phosphate Incorporation
- 2024Observation of grain boundary sliding in a lamellar ultrafine‐grained steel
- 2023Hard and tough novel high-pressure $γ-Si_3N_4/Hf_3N_4$ ceramic nanocompositescitations
- 2023Room temperature viscous flow of amorphous silica induced by electron beam irradiationcitations
- 2021Influence of Al2O3 Addition on Structure and Mechanical Properties of Borosilicate Glasses
- 2020Tailoring the mechanical properties of metaluminous aluminosilicate glasses by phosphate incorporationcitations
- 2020Influence of Al2O3 addition on structure and mechanical properties of borosilicate glassescitations
Places of action
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article
Observation of grain boundary sliding in a lamellar ultrafine‐grained steel
Abstract
The deformation behavior of a ferrite steel with ultrafine‐grained (UFG) lamellar microstructure generated by linear flow splitting is investigated and compared to a coarser cold‐worked reference state, using a set of complementary local deformation and microstructural characterizations methods. The pile‐up around indentations shows a pronounced anisotropy for the UFG lamellar microstructure indicating the relative motion of grains along their elongated boundaries. This observation is confirmed by stepwise compression testing of micropillars along the normal direction of lamellar‐shaped grains using a new faceted pillar geometry to image the initial microstructure and its evolution throughout the test. The surface roughening in pillar compression testing can be categorized into the formation of discrete steps at the surface along particular grain boundaries and a more gradual roughening that is attributed to intragranular dislocation slip. Potential mechanisms for the observed grain boundary sliding are discussed taking several factors such as the strain rate sensitivity and potential Coble creep rates into account. In conclusion, a grain boundary sliding process carried by grain boundary dislocations appears to be the most likely explanation for the observed behavior.