| 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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Mohanty, Gaurav
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2024Tribological behavior and biocompatibility of novel Nickel-Free stainless steel manufactured via laser powder bed fusion for biomedical applicationscitations
- 2024Glass and nanocrystalline phase formation in CuZrAg alloyscitations
- 2024In-situ SEM micropillar compression and nanoindentation testing of SU-8 polymer up to 1000 s−1 strain ratecitations
- 2024Correlated high throughput nanoindentation mapping and microstructural characterization of wire and arc additively manufactured 2205 duplex stainless steelcitations
- 2023Effect of stiff substrates on enhancing the fracture resistance of Barium Titanate thin filmscitations
- 2023Evolution of alumina phase structure in thermal plasma processingcitations
- 2023Evolution of alumina phase structure in thermal plasma processingcitations
- 2023Wire arc additive manufacturing of thin and thick walls made of duplex stainless steelcitations
- 2023High-Entropy Carbides: Processing And Characterization
- 2022Effect of Welding Direction and Bead Pattern in Alloy 52 / SA508 Repair Weld
- 2022Multistage Reversible Tg Photomodulation and Hardening of Hydrazone-Containing Polymerscitations
- 2022Structural characterisation of Cu-Zr thin film combinatorial libraries with synchrotron radiation at the limit of crystallinitycitations
- 2022Dynamic cryo-mechanical properties of additively manufactured nanocrystalline nickel 3D microarchitecturescitations
- 2021Microscale fracture of chromia scalescitations
- 2021Multistage Reversible Tg Photomodulation and Hardening of Hydrazone-Containing Polymerscitations
- 2020Fiber push-in failure in carbon fiber epoxy compositescitations
- 2020Local mechanical properties at the dendrite scale of Ni-Based superalloys studied by advanced high temperature indentation creep and micropillar compression testscitations
- 2020A52M/SA52 Dissimilar Metal RPV Repair Weld:Experimental Evaluation and Post-Weld Characterizationscitations
- 2020A52M/SA52 Dissimilar Metal RPV Repair Weld : Experimental Evaluation and Post-Weld Characterizationscitations
- 2019Microscale fracture of chromia scalescitations
- 2019Novel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 °Ccitations
- 2019Deformation of lamellar γ-TiAl below the general yield stresscitations
- 2019Deformation of lamellar γ-TiAl below the general yield stresscitations
- 2018Longitudinal twinning in a TiAl alloy at high temperature by in situ microcompressioncitations
- 2018Interplay of stresses, plasticity at crack tips and small sample dimensions revealed by in-situ microcantilever tests in tungstencitations
- 2016Room temperature stress relaxation in nanocrystalline Ni measured by micropillar compression and miniature tensioncitations
- 2016Understanding the mechanical behaviour of fiber/matrix interfaces during push-in tests by means of finite element simulations and a cohesive zone modelcitations
- 2016Key-features in processing and microstructure for achieving giant electrostriction in gadolinium doped ceria thin filmscitations
- 2015A comparative transmission electron microscopy, energy dispersive x-ray spectroscopy and spatially resolved micropillar compression study of the yttria partially stabilised zirconia - porcelain interface in dental prosthesiscitations
- 2015Elevated temperature, strain rate jump microcompression of nanocrystalline nickelcitations
- 2015Microscale resolution fracture toughness profiling at the zirconia-porcelain interface in dental prosthesescitations
- 2014Image denoising techniques applied to glow discharge optical emission spectroscopy elemental mappingcitations
- 2014Use of radiofrequency power to enable glow discharge optical emission spectroscopy ultrafast elemental mapping of combinatorial libraries with nonconductive components: nitrogen-based materialscitations
Places of action
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article
Deformation of lamellar γ-TiAl below the general yield stress
Abstract
<p>The occurrence of plasticity below the macroscopic yield stress during tensile monotonic loading of nearly lamellar Ti-45Al-2Nb-2Mn(at%)-0.8 vol% TiB<sub>2</sub> at both 25 °C and 700 °C, and in two conditions of lamellar thickness, was measured by digital image correlation strain mapping of a remodelled Au surface speckle pattern. Such initial plasticity, not necessarily related to the presence of common stress concentrators such as hard particles or cracks, could occur at applied stresses as low as 64% of the general yield stress. For a same applied strain it was more prominent at room temperature, and located as slip and twinning parallel to, and near to or at (respect.) lamellar interfaces of all types in soft mode-oriented colonies. These stretched the full colony width and the shear strain was most intense in the centre of the colonies. Further, the most highly operative microbands of plasticity at specimen fracture were not those most active prior to yielding. The strain mapping results from polycrystalline tensile loading were further compared to those from microcompression testing of soft-mode stacks of lamellae milled from single colonies performed at the same temperatures. Combined with post-mortem transmission electron microscopy of the pillars, the initial plasticity by longitudinal dislocation glide was found to locate within 30–50 nm of the lamellar interfaces, and not at the interfaces themselves. The highly localised plasticity that precedes high cycle fatigue failure is therefore inherently related to the lamellar structure, which predetermines the locations of plastic strain accumulation, even in a single loading cycle.</p>