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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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Bowen, Paul
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2023Thermomechanical Responses of Microcracks in a Honeycomb Particulate Filter
- 2020Spark plasma sintering of ceramics: from modeling to practicecitations
- 2019Mesoscopic quantitative chemical analyses using STEM-EDX in current and next generation polycrystalline Ni-based superalloyscitations
- 2018On the effect of Nb on the microstructure and properties of next generation polycrystalline powder metallurgy Ni-based superalloyscitations
- 2017cemffcitations
- 2017Comparison of apparent activation energies for densification of alumina powders by pulsed electric current sintering (spark plasma sintering) and conventional sintering-toward applications for transparent polycrystalline aluminacitations
- 2017cemff : A force field database for cementitious materials including validations, applications and opportunitiescitations
- 2017cemff: a force field database for cementitious materials including validations, applications and opportunitiescitations
- 2016Atomistic simulations of silicate species interaction with portlandite surfacescitations
- 2015The role of oxidation damage in fatigue crack initiation of an advanced Ni-based superalloycitations
- 2015How colloid-colloid interactions and hydrodynamic effects influence the percolation threshold: A simulation study in alumina suspensionscitations
- 2015Effect of prior oxidation on high cycle fatigue performance of RR1000 and role of oxidation in fatigue crack initiationcitations
- 2015Surface 3D micro free forms: multifunctional microstructured mesoporous α-alumina by in situ slip casting using excimer laser ablated polycarbonate moldscitations
- 2011BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING
- 2011INFLUENCE OF ATTRITION MILLING ON BARIUM TITANATE PROPERTIES
- 2008Characterization of Barium Titanate powders Prepared by polymeric Precursors Method
- 2008Influence of lanthanum doping on properties of BaTiO3 prepared from organometallic complex
- 2007Improved superplasticisers for high performance concrete: the SUPERPLAST project
- 2007Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flowcitations
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article
The role of oxidation damage in fatigue crack initiation of an advanced Ni-based superalloy
Abstract
The effects of prior oxidation on the room temperature fatigue life of coarse-grained Ni-based superalloy, RR1000, have been investigated. High cycle fatigue tests were conducted, on both machined and pre-oxidised testpieces, at room temperature at an R ratio of 0.1. The oxidation damage was produced by pre-exposures at 700 °C for either 100 or 2000 h. Pre-oxidised testpieces tended to fail with shorter fatigue lives than those obtained from the as-machined testpieces although they were also observed to outperform the as-machined test pieces at peak stress levels around 900 MPa. The chromia scale and intergranular alumina intrusions formed during pre-oxidation are prone to crack under fatigue loading leading to early crack nucleation and an associated reduction in fatigue life. This has been confirmed to be the case both below and above a peak stress level of ∼900 MPa. The better fatigue performance of the pre-oxidised specimens around this stress level is attributed to plastic yielding of the weaker γ′ denuded zone, which effectively eases the stress concentration introduced by the cracking of the chromia scale and intergranular internal oxides. This γ′ denuded zone is also a product of pre-oxidation and develops as a result of the selective oxidation of Al and Ti. Over a limited stress range, its presence confers a beneficial effect of oxidation on fatigue life.