| 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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Alfreider, Markus
Montanuniversität Leoben
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Stabilization of mechanical strength in a nanocrystalline CoCrNi concentrated alloy by nitrogen alloying
- 2024Micro-Mechanical Fracture Investigations on Grain Size Tailored Tungsten-Copper Nanocompositescitations
- 2024Automatic and time-resolved determination of fracture characteristics from in situ experimentscitations
- 2023Deformation and failure behavior of nanocrystalline WCucitations
- 2023Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloycitations
- 2023Revealing the nano-scale mechanisms of the limited non-basal plasticity in magnesium
- 2023Nanoscale printed tunable specimen geometry enables high-throughput miniaturized fracture testingcitations
- 2022In situ micromechanical analysis of a nano-crystalline W-Cu compositecitations
- 2022Interface mediated deformation and fracture of an elastic–plastic bimaterial system resolved by in situ transmission scanning electron microscopycitations
- 2022The influence of chemistry on the interface toughness in a WTi-Cu systemcitations
- 2021Prospects of Using Small Scale Testing to Examine Different Deformation Mechanisms in Nanoscale Single Crystals—A Case Study in Mgcitations
- 2021Extracting information from noisy data: strain mapping during dynamic in situ SEM experimentscitations
- 2020Correlation between fracture characteristics and valence electron concentration of sputtered Hf-C-N based thin filmscitations
- 2020In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloycitations
- 2020Probing defect relaxation in ultra-fine grained Ta using micromechanical spectroscopycitations
- 2019Bioinspired nacre-like alumina with a bulk-metallic glass-forming alloy as a compliant phasecitations
- 2019Rate limiting deformation mechanisms of bcc metals in confined volumescitations
- 2018In-situ elastic-plastic fracture mechanics on the microscale by means of continuous dynamical testingcitations
- 2018In-situ TEM observation of {101¯2} twin-dominated deformation of Mg pillarscitations
- 2017The influence of deformation and proton-irradiation on the mechanical behaviour in nano-crystalline stainless steels
- 2016Synthesis and Mechanical Characterisation of an Ultra-Fine Grained Ti-Mg Compositecitations
Places of action
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article
In situ micromechanical analysis of a nano-crystalline W-Cu composite
Abstract
W-Cu composites are commonly used as heat-sinks or high-performance switches in power electronics. To enhance their mechanical properties and mutually their usability, grain refinement of the initially coarse-grained microstructure was realized using high–pressure torsion. This leads to different microstructural conditions, exhibiting fine-, ultrafine-grained or nanocrystalline microstructures. Scanning as well as transmission electron microscopy was performed to analyze the respective grain size and microstructures. The hardness and Young’s modulus of the deformed specimens were quantified by nanoindentation testing. Furthermore, X–ray diffraction indicated a decreased grain size and changed lattice spacings upon increasing the deformation ratio. The deformed specimens were tested for their fracture behaviour by continuous stiffness measurements during in-situ microcantilever bending experiments. Here, mean J–integral values of 288 ± 38 J/m2 and 402 ± 89 J/m2 were determined for the 5 and 50 times turned specimens, respectively. The combination of different characterization methods applied on a W–Cu composite allows to identify both, beneficial and unfavourable microstructural components regarding the fracture properties.