| 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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Molina-Aldareguia, Jon M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Fracture resistance of binderless tungsten carbide consolidated by spark plasma sintering and flash sinteringcitations
- 2023Room temperature stability, structure and mechanical properties of cubic tungsten carbide in flash sintered productscitations
- 2023Does flash sintering alter the deformation mechanisms of tungsten carbide?citations
- 2023Role of surface carbon nanolayer on the activation of flash sintering in tungsten carbidecitations
- 2022Selective Metal Ion Irradiation Using Bipolar HIPIMS: A New Route to Tailor Film Nanostructure and the Resulting Mechanical Propertiescitations
- 2021High temperature in situ SEM assessment followed by ex situ AFM and EBSD investigation of the nucleation and early growth stages of Fe-Al intermetallicscitations
- 2018Single-imprint moth-eye anti-reflective and self-cleaning film with enhanced resistancecitations
- 2016A 3D dislocation dynamics analysis of the size effect on the strength of [111] LiF micropillars at 300K and 600Kcitations
- 2016Comparison of push-in and push-out tests for measuring interfacial shear strength in nano-reinforced composite materialscitations
- 2015A study of composite laminates failure using an anisotropic gradient-enhanced damage mean-field homogenization modelcitations
- 2015An XFEM/CZM implementation for massively parallel simulations of composites fracturecitations
- 2014Understanding size effects on the strength of single crystals through high-temperature micropillar compressioncitations
- 2014Mechanical behavior of nanoscale multilayers Prefacecitations
- 2013Superplastic deformation of directionally solidified nanofibrillar Al2O3-Y3Al5O12-ZrO2 eutecticscitations
- 2012Influence of Plasma Surface Treatments on Kink Band Formation in PBO Fibers During Compressioncitations
- 2011An experimental and numerical study of the influence of local effects on the application of the fibre push-in testcitations
- 2010Effect of fiber, matrix and interface properties on the in-plane shear deformation of carbon-fiber reinforced compositescitations
- 2010Thermomechanical Properties of Copper-Carbon Nanofibre Composites Prepared by Spark Plasma Sintering and Hot Pressingcitations
Places of action
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article
Understanding size effects on the strength of single crystals through high-temperature micropillar compression
Abstract
Compression tests of 〈1 1 1〉-oriented LiF single-crystal micropillars 1–5 μm in diameter were carried out from 25 °C to 250 °C. While the flow stress at ambient temperature was independent of the micropillar diameter, a strong size effect developed with elevated temperature. This behavior was explained by rigorously accounting for the different contributions to the flow stress of the micropillars as a function of temperature and pillar diameter: the lattice resistance, the forest hardening; and the size-dependent contribution as a result of the operation of single-arm dislocation sources. This was possible because the micropillars were obtained by chemically etching away the surrounding matrix in directionally solidified LiF–NaCl and LiF–KCl eutectics, avoiding any use of focused ion beam methods, yielding micropillars with a controlled dislocation density, independent of the sample preparation technique. In particular, the role of the lattice resistance on the size effect of micrometer-size single crystals was demonstrated unambiguously for the first time. This result rationalizes the different values of power-law exponent for the size effect found in the literature for face-centered cubic and body-centered cubic metals as well as for covalent and ionic solids.