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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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Reed, Philippa A. S.
University of Southampton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (65/65 displayed)
- 2023Fatigue crack initiation and growth behavior within varying notch geometries in the low-cycle fatigue regime for FV566 turbine blade materialcitations
- 2023Fatigue crack initiation and growth behavior within varying notch geometries in the low-cycle fatigue regime for FV566 turbine blade materialcitations
- 2022Effect of heat treatment on fatigue crack growth in IN718/316L multiple-materials layered structures fabricated by laser powder bed fusioncitations
- 2021Fatigue crack growth in IN718/316L multi-materials layered structures fabricated by laser powder bed fusioncitations
- 2021Data rich imaging approaches assessing fatigue crack initiation and early propagation in a DS superalloy at room temperaturecitations
- 2021Fatigue crack initiation and growth behavior in a notch with periodic overloads in the low-cycle fatigue regime of FV566 ex-service steam turbine blade materialcitations
- 2021Fatigue crack initiation and growth behavior in a notch with periodic overloads in the low-cycle fatigue regime of FV566 ex-service steam turbine blade materialcitations
- 2019On the mechanism of oxidation-fatigue damage at intermediate temperatures in a single crystal Ni-based superalloycitations
- 2018Strain accumulation and fatigue crack initiation at pores and carbides in a SX superalloy at room temperaturecitations
- 2018Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloycitations
- 2017Effect of intermetallic particles and grain boundaries on short fatigue crack growth behaviour in a cast Al-4Cu-3Ni-0.7Si piston alloycitations
- 2017Effect of microstructure on fatigue behaviour of advanced high strength ductile cast iron produced by quenching and partitioning processcitations
- 2017Effect of microstructure on fatigue behaviour of advanced high strength ductile cast iron produced by quenching and partitioning processcitations
- 2017Characterisation of strain localisation processes during fatigue crack initiation and early crack propagation by SEM-DIC in an advanced disc alloycitations
- 2017Application of X-Ray microtomography to evaluate complex microstructure and predict the lower bound fatigue potential of cast Al–7(0.7)Si–4Cu–3Ni–Mg alloys
- 2016Effects of oxidation on fatigue crack initiation and propafation in an advanced disk alloy
- 2016Fatigue crack growth behaviour in the LCF regime in a shot peened steam turbine blade materialcitations
- 2015Realistic microstructure-based modelling of cyclic deformation and crack growth using crystal plasticitycitations
- 2015Superplastic behaviour of AZ91 magnesium alloy processed by high– pressure torsioncitations
- 20153-D analysis of fatigue crack behaviour in a shot peened steam turbine blade materialcitations
- 2015Influence of oxidation on fatigue crack initiation and propagation in turbine disc alloy N18citations
- 2014Micromechanisms of short fatigue crack growth in an Al-Si piston alloycitations
- 2014Grain size effects in a Ni-based turbine disc alloy in the time and cycle dependent crack growth regimescitations
- 2013Microstructural modelling of fatigue initiation in aluminium-bearing alloyscitations
- 2013Comparison of fatigue crack propagation behaviour in two gas turbine disc alloys under creep–fatigue conditions: evaluating microstructure, environment and temperature effectscitations
- 2013Evaluating surface deformation and near surface strain hardening resulting from shot peening a tempered martensitic steel and application to low cycle fatiguecitations
- 2012Micromechanisms of fatigue crack growth in cast aluminium piston alloyscitations
- 2011The effect of shot peening on notched low cycle fatiguecitations
- 2011Analysis of fatigue crack initiation and S-N response of model cast aluminium piston alloyscitations
- 2010Comparison of time-dependent crack growth mechanisms in a range of turbine disc alloys
- 2010Characterisation of the influence of minor elements on microstructure variations in a secondary cast aluminium piston alloy
- 2009Comparison of fatigue performance of HVOF spray coated and conventional roll bonded aluminium bearing alloys
- 2009Plain bearing stresses due to forming and oil film pressure
- 2009Fatigue crack growth mechanisms in superalloys: an overviewcitations
- 2008Temperature and dwell dependence of fatigue crack propagation in various heat treated turbine disc alloys
- 2008Elasto-plastic finite element studies of fatigue crack shielding in multi-layered systems
- 2008Thermal activation of fatigue crack growth: analysing the mechanisms of fatigue crack propagation in superalloyscitations
- 2007The mechanisms of long fatigue crack growth behaviour in Al–Si casting alloys at room and elevated temperaturecitations
- 2007Effects of graphite nodules on crack growth behaviour of austempered ductile ironcitations
- 2007A comparison of high temperature fatigue crack propagation in various sub-solvus heat treated turbine disc alloyscitations
- 2006Fatigue crack growth and closure in fine-grained aluminium alloyscitations
- 2006Microstructural analysis of fatigue initiation in Al-Si casting alloys
- 2006Microstructural factors affecting fatigue initiation in various Al based bearing alloys
- 2006Fatigue behaviour in fine grained aluminium alloys
- 2006A comparison of high temperature fatigue crack propagation in sub-solvus heat treated turbine disc alloys
- 2005The effect of silicon content on long crack fatigue behaviour of aluminium-silicon piston alloy at elevated temperaturescitations
- 2005Effect of temperature and secondary orientation on notch fatigue resistance of CMSX4
- 2004The effect of environment and orientation on fatigue crack growth behaviour of CMSX-4 nickel base single crystal at 650 °Ccitations
- 2004Fatigue crack initiation and early growth in a multiphase Al alloy included in a multilayer material systemcitations
- 2004Quantitative assessment of preferential fatigue initiation sites in a multi-phase aluminium alloycitations
- 2004The potential of new processing routes in Al-based plain journal bearings
- 2003Microstructural characterisation of fatigue crack initiation in Al-based plain bearing alloyscitations
- 2003Elevated temperature short crack fatigue behaviour in near eutectic Al-Si alloyscitations
- 2002High temperature fatigue crack growth in powder processed nickel based superalloy U720Licitations
- 2002Elevated temperature fatigue of Al-Si piston alloys
- 2002Elastic-plastic characterisation of aluminium bearing alloys
- 2001Regression models for classification to enhance interpretability
- 2001Classification of imbalanced data with transparent kernelscitations
- 2000Microstructural influences on fatigue crack initiation and early growth behaviour in plain bearing Al-based linings
- 2000Effects of grain and precipitate size variation on creep-fatigue behaviour of Udimet 720Li in both air and vacuum
- 2000A study of the role of (Nb,Ti)C carbides in fatigue crack initiation in IN718 at 20oC and 600oC
- 2000The use of modelling techniques to describe recrystallized grain size of commercially processed 6000-series aluminium alloy components
- 2000Neurofuzzy and SUPANOVA modelling of structure-property relationships in Al-Zn-Mg-Cu alloys
- 2000Effect of oxidation on high temperature fatigue crack initiation and short crack growth in Inconel 718
- 2000Fatigue of an Al-Si gravity die casting alloy
Places of action
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article
Comparison of fatigue crack propagation behaviour in two gas turbine disc alloys under creep–fatigue conditions: evaluating microstructure, environment and temperature effects
Abstract
Gas turbine disc materials should possess excellent fatigue and creep performance due to the severe in service conditions experienced. In this study, a comparison of fatigue crack propagation behaviour in two turbine disc alloys, i.e. N18 and low solvus high refractory (LSHR) superalloy, has been made in terms of the propagation rate and fractography observed under equivalent testing conditions. Temperatures of 650 and 725uC are compared for a trapezoidal dwell fatigue cycle (1– 20–1–1) in both air and vacuum at an R ratio of 0?1. It is found that coarse grained LSHR superalloy has better fatigue crack propagation resistance than fine grained N18 in vacuum, which is ascribed to its better creep performance. Oxidation causes significant degradation of fatigue performance of these two alloys, especially in the LSHR superalloy at higher temperature (725uC), resulting in its inferior fatigue performance compared with N18. In the LSHR superalloy, it seems that oxidation is the principal contributor to the deterioration of fatigue resistance. This is supported by observations of transgranular fracture in vacuum and intergranular fracture in air. In contrast, creep is a greater contributor to the deterioration in fatigue performance of N18 (as indicated by the intergranular failure modes observed in vacuum). An apparent activation energy analysis is able to provide further insight into the underlying mechanisms of fatigue crack propagation under creep–oxidation– fatigue conditions in these two alloys.