| 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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Durst, Karsten
Technical University of Darmstadt
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (31/31 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
- 2024Advanced Nanoindentation Testing for Studying Strain-Rate Sensitivity and Activation Volume
- 2024Mechanical softening of CuX alloys at elevated temperatures studied via high temperature scanning indentationcitations
- 2024Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocationscitations
- 2024Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review
- 2024Influence of Colloidal Additivation with Surfactant‐Free Laser‐Generated Metal Nanoparticles on the Microstructure of Suction‐Cast Nd–Fe–B Alloy
- 2024A simple way to make tough diamond/metal laminates
- 2024Bioinspired damage tolerant diamond-metal laminates by alternating CVD and PVD processes
- 2024Nanoindentation creep testing: Advantages and limitations of the constant contact pressure method
- 2024Tailoring the Mechanical Properties of Metaluminous Aluminosilicate Glasses by Phosphate Incorporation
- 2024Severe plastic deformation for producing Superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary reviewcitations
- 2024Observation of grain boundary sliding in a lamellar ultrafine‐grained steel
- 2023Influence of Colloidal Additivation with Surfactant‐Free Laser‐Generated Metal Nanoparticles on the Microstructure of Suction‐Cast Nd–Fe–B Alloycitations
- 2023Direct Observation of Quadrupolar Strain Fields forming a Shear Band in Metallic Glassescitations
- 2023Room temperature viscous flow of amorphous silica induced by electron beam irradiationcitations
- 2022Direct observation of Eshelby inclusions in metallic glasses
- 2022Effect of High-Pressure Torsion on the Microstructure and Magnetic Properties of Nanocrystalline CoCrFeNiGax (x = 0.5, 1.0) High Entropy Alloyscitations
- 2021Influence of Al2O3 Addition on Structure and Mechanical Properties of Borosilicate Glasses
- 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
- 2020Tailoring the mechanical properties of metaluminous aluminosilicate glasses by phosphate incorporationcitations
- 2020Influence of Al2O3 addition on structure and mechanical properties of borosilicate glassescitations
- 2015Nanoindentation studies of the mechanical properties of the mu phase in a creep deformed Re containing nickel-based superalloycitations
- 2014An improved long-term nanoindentation creep testing approach for studying the local deformation processes in nanocrystalline metals at room and elevated temperaturescitations
- 2012Failure mechanisms of a hydrogenated amorphous carbon coating in load-scanning testscitations
- 2012Failure mechanisms of a tungsten-modified hydrogenated amorphous carbon coating in load-scanning testscitations
- 2006Determination of Plastic Properties of Polycrystalline Metallic Materials by Nanoindentation – Experiments and Finite Element Simulationscitations
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.