In-Service Oxidation and Microstructural Evolution of a Nickel Superalloy in a Formula 1 Car Exhaust
De Lille, D
Oxidation of Metals
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Pedrazzini, S., Kiseeva, E., Escoube, R., Gardner, H., Douglas, J., Radecka, A., Mignanelli, P., et al. (2017). In-Service Oxidation and Microstructural Evolution of a Nickel Superalloy in a Formula 1 Car Exhaust. Oxidation of Metals https://doi.org/10.1007/s11085-017-9792-7
The oxidation response and microstructural evolution of an Inconel 625 alloy exhaust manifold exposed to an automobile racing environment has been examined using a range of advanced electron microscopy-based techniques, atom probe tomography and high-sensitivity laser ablation mass spectrometry. The dynamic, corrosive gas conditions result in accelerated oxidation, with the inner exhaust surface also heavily contaminated by multiple species including Zn, P, K and Na. Nb carbides and Ti nitrides identified in stock control samples evolve into mixed (Ti, Nb)N species during exposure, decorated by smaller Mo, Si-rich precipitates. The exposed alloy component therefore reveals unique surface and subsurface features following in-service use.
LA-ICPMS experiments were carried out in the Department of Earth Sciences with thanks to Prof. Bernard Wood, financially supported by ERC Grant 267764. E.S. Kiseeva was supported by NERC Grant NE/L010828/1. Additional EPMA experiments were carried out at the School of Geosciences, University of Edinburgh with thanks to Dr. Chris Hayward. A. Radecka was supported by Prof. David Dye at Imperial College London and Prof. Dave Rugg in Rolls-Royce plc. for facilities to prepare samples.
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External DOI: https://doi.org/10.1007/s11085-017-9792-7
This record's URL: https://www.repository.cam.ac.uk/handle/1810/267503