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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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Mokhtarishirazabad, Mehdi
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Bridging Length Scales Efficiently Through Surrogate Modellingcitations
- 2022Effect of Heat-Treating on Microstructure and High Cycle Bending Fatigue Behavior of AZ91 and AZE911 Magnesium Alloyscitations
- 2021Evaluation of fracture toughness and residual stress in AISI 316L electron beam weldscitations
- 2020Study of the biaxial fatigue behaviour and overloads on S355 low carbon steelcitations
- 2020Study of the biaxial fatigue behaviour and overloads on S355 low carbon steelcitations
- 2020The effect of grain size on the fatigue overload behaviour of nickelcitations
- 2019Estudios de propagación de grietas mediante correlación de imágenes y mecánica de la fractura ; Multi-parameter fracture mechanic analysis of fatigue crack propagation by digital image correlation
- 2019Effects of In-Plane and Out-of-Plane Constraint on Fracture Toughness in Austenitic Stainless Steel
- 2019Effects of In-Plane and Out-of-Plane Constraint on Fracture Toughness in Austenitic Stainless Steelcitations
- 2019Study of the Fracture Toughness in Electron Beam Weldscitations
- 2019Study of the Fracture Toughness in Electron Beam Welds
- 2019Effects of loading rate on crack growth behavior in carbon fiber reinforced polymer composites using digital image correlation techniquecitations
- 2013Heat treatment effect on thermo-mechanical fatigue and low cycle fatigue behaviors of A356.0 aluminum alloycitations
- 2013Effect of rare earth elements on high cycle fatigue behavior of AZ91 alloycitations
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article
The effect of grain size on the fatigue overload behaviour of nickel
Abstract
The fatigue overload behaviours of coarse grain (~30 μm), ultrafine grain (360 nm) and nanocrystalline (~30 nm) Ni are compared under constant amplitude loading at R = 0.1 after a 100% overload. Synchrotron X-ray diffraction is applied to map the elastic crack-tip strain fields at the mid-thickness of a compact tension specimen of nanocrystalline Ni at various stages through the loading cycles, from which the variation in stress before, during and after overload is estimated. Digital image correlation is used to measure the crack length and the displacement fields at the specimen surfaces for both grain sizes, from which the fatigue crack growth (FCG) rate, crack opening displacement and stress intensity factor range are determined. The FCG for coarse grain Ni is most significantly retarded whereas the nanocrystalline Ni is least affected by the overload due to an increased yield stress and a more planar crack surface morphology. As a result, FCG retardation by plasticity, surface roughness and residual stress-induced crack closure are reduced.