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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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Fæster, Søren
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (34/34 displayed)
- 2024Microstructural Evolution During Welding of High Si Solution-Strengthened Ferritic Ductile Cast Iron Using Different Filler Metalscitations
- 2024An experimentally validated thermomechanical model for a parametric study on reducing residual stress in cast iron repair welding
- 2023New White Etch Cracking resistant martensitic stainless steel for bearing applications by high temperature solution nitridingcitations
- 2023Dataset for scanning electron microscopy based local fiber volume fraction analysis of non-crimp fabric glass fiber reinforced compositescitations
- 2023Corrosion surface morphology-based methodology for fatigue assessment of offshore welded structurescitations
- 2023Understanding the challenges during repair welding of EN GJS-500-14 spheroidal cast iron for wind industry
- 2023Thermomechanical modeling and experimental study of a multi-layer cast iron repair welding for weld-induced crack predictioncitations
- 2022Effect of manufacturing defects on fatigue life of high strength steel bolts for wind turbinescitations
- 2022Technologies of Wind Turbine Blade Repair: Practical Comparisoncitations
- 2021Nanoengineered graphene-reinforced coating for leading edge protection of wind turbine bladescitations
- 2021Scanning electron microscopy datasets for local fibre volume fraction determination in non-crimp glass-fibre reinforced compositescitations
- 2021Unraveling compacted graphite evolution during solidification of cast iron using in-situ synchrotron X-ray tomographycitations
- 2020Analysis of the correlation between micro-mechanical fields and fatigue crack propagation path in nodular cast ironcitations
- 2019X-ray tomography data of compression tested unidirectional fibre composites with different off-axis anglescitations
- 2019Impact of micro-scale residual stress on in-situ tensile testing of ductile cast iron: Digital volume correlation vs. model with fully resolved microstructure vs. periodic unit cellcitations
- 20192D and 3D characterization of rolling contact fatigue cracks in manganese steel wing rails from a crossingcitations
- 2019Crack formation within a Hadfield manganese steel crossing nosecitations
- 20182D and 3D characterization of rolling contact fatigue cracks in a manganese steel crossing wing rail
- 2018Preface for the 39th Risø Symposium Proceedings, IOP publication
- 2017Non-spherical voids and lattice reorientation patterning in a shock-loaded Al single crystalcitations
- 2017Multiscale characterization of White Etching Cracks (WEC) in a 100Cr6 bearing from a thrust bearing test rigcitations
- 2017Graphite nodules in fatigue-tested cast iron characterized in 2D and 3Dcitations
- 2017Analysis of bearing steel exposed to rolling contact fatiguecitations
- 2017Synchrotron measurements of local microstructure and residual strains in ductile cast ironcitations
- 20163D characterization of rolling contact fatigue crack networkscitations
- 2016Three-dimensional local residual stress and orientation gradients near graphite nodules in ductile cast ironcitations
- 2014Grinding induced martensite on the surface of rails
- 2014Statistical analysis of manufacturing defects on fatigue life of wind turbine casted Component
- 2014Characterization of graphite nodules in thick-walled ductile cast iron
- 2011Growth of thin fullerene films by Matrix Assisted Pulsed Laser Evaporation
- 2011Laser-assisted deposition of thin C60 films
- 2006Controlling Interface Adhesion and Fracture Properties in Composite Materials by Plasma Polymerisation
- 2004Measurement of the components of plastic displacement gradients in three dimensionscitations
- 2004Metal Microstructures in Four Dimensions
Places of action
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article
3D characterization of rolling contact fatigue crack networks
Abstract
Rolling contact fatigue (RCF) damage is becoming more frequent with increased traffic, accelerations, and loading conditions in the railway industry. Defects which are characterized by a two-lobe darkened surface and a V-shaped surface-breaking crack are defined as squats. The origination and propagation of squats in railway rails is the topic of many recent studies; the associated crack networks develop with complicated geometry near the surface of rails, but can be difficult to detect and distinguish from normally existing head checks in their early stages, using in-field non-destructive detection techniques. After cutting out damaged sections of rail, there are a number of options to characterize the damage. The aim of this study was to evaluate different methods to geometrically describe squat crack networks; through X-ray radiography complemented with geometrical reconstruction, metallography, X-ray tomography, and topography measurements. The experiments were performed on squats from rail sections taken from the field. In the first method, high-resolution and high-energy X-ray images exposed through the entire rail head from a range of angles were combined using a semi-automated image analysis method for geometrical reconstruction, and a 3D representation of the complex crack network was achieved. This was compared with measurements on cross-sections after repeated metallographic sectioning to determine the accuracy of prediction of the geometrical reconstruction. A second squat was investigated by X-ray tomography after extraction of a section of the rail head. A third squat was opened by careful cutting, which gave full access to the crack faces, and the topography was measured by stylus profilometry. The high-energy X-ray, 3D reconstruction method showed accurate main crack geometry at medium depths; the advantage of the method being that it potentially could be developed for non-destructive testing in field. However significant drawbacks exist due to limitations in radiography in terms of detecting tightly closed cracks in very thick components. This includes the inability to detect the crack tips which is an important factor in determining the risks associated to a specific crack. Metallographic investigation of the cracks gave good interpretation of crack geometry along the sections examined, and gave the possibility to study microstructure and plastic deformation adjacent to the crack face. However this time-consuming method requires destruction of the specimen investigated. The X-ray tomography revealed the 3D crack network including side branches in a 10×10×30mm3 sample, and provided topographic information without completely opening the squat. Topography measurements acquired by stylus profilometry provided an accurate description of the entire main crack surface texture, including features such as surface ridges and beach marks.