| 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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Bruder, Enrico
Technical University of Darmstadt
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Solid solution hardening in CrMnFeCoNi-based high entropy alloy systems studied by a combinatorial approach
- 2024Switching the fracture toughness of single-crystal ZnS using light irradiation
- 2024Mechanical softening of CuX alloys at elevated temperatures studied via high temperature scanning indentationcitations
- 2024{001}-textured Pb(Zr, Ti)O₃ thin films on stainless steel by pulsed laser deposition
- 2024Observation of grain boundary sliding in a lamellar ultrafine‐grained steel
- 2021Switching the fracture toughness of single-crystal ZnS using light irradiationcitations
- 2021From diluted solid solutions to high entropy alloys: Saturation grain size and mechanical properties after high pressure torsioncitations
- 2021Dislocation-toughened ceramicscitations
- 2021Nanoindentation pop‐in in oxides at room temperature: Dislocation activation or crack formation?citations
- 2021Microstructure formation and mechanical properties of ODS steels built by laser additive manufacturing of nanoparticle coated iron-chromium powderscitations
- 2019Strain-rate sensitive ductility in a low-alloy carbon steel after quenching and partitioning treatmentcitations
- 2019Towards manufacturing of Nd-Fe-B magnets by continuous rotary swaging of cast alloycitations
- 2018Anisotropic local hardening in hot-deformed Nd-Fe-B permanent magnetscitations
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.