| 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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Cao, Y.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2021Investigating high opacity and increased activation energy in the multi-trigger resistcitations
- 2018Fine (Cr,Fe)2B borides on grain boundaries in a 10Cr–0.01B martensitic steelcitations
- 2018Unusual Suppression of the Superconducting Energy Gap and Critical Temperature in Atomically Thin NbSe2citations
- 2018Fine (Cr,Fe) 2 B borides on grain boundaries in a 10Cr–0.01B martensitic steelcitations
- 2017Test methods to determine durability of concrete under combined environmental actions and mechanical load: final report of RILEM TC 246-TDCcitations
- 2017Recommendation of RILEM TC 246-TDC: test methods to determine durability of concrete under combined environmental actions and mechanical load: Test method to determine the effect of applied stress on chloride diffusioncitations
- 2016High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSecitations
- 2016Intergranular crack tip oxidation in a Ni-base superalloycitations
- 2015Solution processed bismuth sulfide nanowire array core/silver shuffle shell solar cellscitations
- 2013Intergranular crack tip oxidation in a Ni-base superalloycitations
- 2013New atom probe approaches to studying segregation in nanocrystalline materialscitations
- 2008Identifying the limitation of Oliver and Pharr method in characterizing the viscoelasticplastic materials with respect to indenter geometry
Places of action
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article
Intergranular crack tip oxidation in a Ni-base superalloy
Abstract
High-temperature intergranular crack tip oxidation under a single 600 s long sustained tensile load at 700 °C was studied for the Ni-base superalloy Allvac 718Plus. High-resolution analytical techniques showed oxidation to take place at and immediately ahead of the tip of an open crack, forming a closed but layered oxide structure about the prior (now oxidized) grain boundary. Near the prior grain boundary the oxide is Ni-rich, with a Co-enriched layer furthest away from the metal and a Fe-enriched region below this. A Cr-rich oxide is present below the outer Ni-rich oxides throughout the crack, also in the direction of crack growth. This is believed to have a hindering effect on oxidation ahead of the crack. Ni3(Nb,Al) γ′ precipitates close to the grain boundaries were found to oxidize and form regions of near-stoichiometric NiO within the oxide layers. Remaining constituents of γ′ (e.g. Al and Nb) were found to be enriched in the surrounding oxidized matrix and also to produce thin oxide layers near the interface between the unoxidized metal and the Cr-rich oxide. The formation of the crack tip oxides is discussed with regard to thermodynamics, kinetics and the influence of applied mechanical load. © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.