| 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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Larrosa, Nicolas O.
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Corrosion mechanisms of plasma welded Nickel aluminium bronze immersed in seawatercitations
- 2024Modelling the Effect of Residual Stresses on Damage Accumulation Using a Coupled Crystal Plasticity Phase Field Fracture Approach
- 2024Cohesive zone modelling of hydrogen environmentally assisted cracking for double cantilever beam samples of 7xxx aluminium alloys
- 2023The role of corrosion pit topography on stress concentration
- 2023Investigation of the effect of pitting corrosion on the fatigue strength degradation of structural steel using a short crack modelcitations
- 2023Investigation of the effect of pitting corrosion on the fatigue strength degradation of structural steel using a short crack modelcitations
- 2022Development of a microstructural cohesive zone model for intergranular hydrogen environmentally assisted crackingcitations
- 2022Development of a microstructural cohesive zone model for intergranular hydrogen environmentally assisted crackingcitations
- 2022Sizing limitations of ultrasonic array images for non-sharp defects and their impact on structural integrity assessmentscitations
- 2022The Role of Surface Roughness on Pitting Corrosion Initiation in Nickel Aluminium Bronzes in Aircitations
- 2020Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural modelcitations
- 2020Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural modelcitations
- 2020Hydrogen environmentally assisted cracking during static loading of AA7075 and AA7449citations
- 2020Hydrogen environmentally assisted cracking during static loading of AA7075 and AA7449citations
- 2018Linking microstructure and processing defects to mechanical properties of selectively laser melted AlSi10Mg alloycitations
- 2018Corrosion-fatiguecitations
- 2017A transferability approach for reducing excessive conservatism in fracture assessmentscitations
- 2016Ductile fracture modelling and J-Q fracture mechanicscitations
- 2016Blunt defect assessment in the framework of the failure assessment diagramcitations
- 2015Characterization of the effect of notch bluntness on hydrogen embrittlement and fracture behavior using fe analyses
- 2015Fatigue life estimation of pitted specimens by means of an integrated fracture mechanics approachcitations
Places of action
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conferencepaper
The Role of Surface Roughness on Pitting Corrosion Initiation in Nickel Aluminium Bronzes in Air
Abstract
Nickel Aluminium Bronze (NAB) continues to be used extensively in the marine industry and is most commonly seen in valves and propellers due to its strength and corrosion resistance. However, components used for marine applications often endure long exposure to air during storage periods prior to installation and NAB is vulnerable to pitting corrosion in air. To investigate the potential condition of stored NAB, this study measured the height, width and percentage coverage of corrosion pits observed in NAB samples after 4 months of air exposure at room temperature in a laboratory.<br/><br/>Four different types of NAB samples were considered; off-the-shelf (sample 1a), polished (sample 1b), laser beam welded (sample 1c) and failed in service (samples 2a and 2b) and the microstructure of the samples was characterised using a mixture of microscopic techniques including surface roughness characterisation, SEM, EBSD, EDX and neutron diffraction.<br/><br/>Examples of pitting corrosion were found on each sample type after 4 months of exposure to air. The results show significant correlation between surface roughness of the pre-corroded sample and pitting coverage, and this is thought to be due to the development of crevice corrosion during the 4 months of air exposure. It also highlights the inaccuracies in using Ra values alone to measure surface roughness in samples where localised corrosion pits are suspected due to high surface roughness or long periods of air exposure.<br/><br/>The results of this study bring into question the pitting corrosion that would be found in components that are stored for longer period before being installed onto vessels. This has concerning safety implications as the initial surface characteristics of the metal may influence the residual load-bearing capacity of components.