Gamma Prime Precipitate Evolution During Aging of a Model Nickel Based Superalloy
Authors
Goodfellow, Amy
Galindo-Nava, E
Christofidou, Katerina
Martin, T
Bagot, P
Boyer, C
Hardy, M
Publication Date
2018-03-01Journal Title
Metallurgical and Materials Transactions A
ISSN
1073-5623
Publisher
Springer
Volume
49
Issue
3
Pages
718-728
Language
eng
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Goodfellow, A., Galindo-Nava, E., Christofidou, K., Jones, N., Martin, T., Bagot, P., Boyer, C., et al. (2018). Gamma Prime Precipitate Evolution During Aging of a Model Nickel Based Superalloy. Metallurgical and Materials Transactions A, 49 (3), 718-728. https://doi.org/10.1007/s11661-017-4336-y
Abstract
The microstructural stability of nickel-based superalloys is critical for maintaining alloy performance during service in gas turbine engines. In this study, the precipitate evolution in a model polycrystalline Ni-based superalloy during aging to 1000 hours has been studied via transmission electron microscopy, atom probe tomography and neutron diffraction. Variations in phase composition and precipitate morphology, size and volume fraction were observed during aging, whilst the constrained lattice misfit remained constant at approximately zero. The experimental composition of the γ matrix phase was consistent with thermodynamic equilibrium predictions, whilst significant differences were identified between the experimental and predicted results from the γʹ phase. These results have implications for the evolution of mechanical properties in service and their prediction using modeling methods.
Sponsorship
The authors wish to acknowledge Mrs. S. Rhodes, Dr. H.T. Pang, Dr. D.M. Collins, and Dr. O.M.D.M. Messé for their assistance with the experiments performed. Funding was provided by the EPSRC/Rolls-Royce Strategic Partnership under EP/M005607/1 and EP/H022309/1. The Oxford Atom Probe facility was funded by the EPSRC under EP/M022803/1. Neutron diffraction beam time was supported through the Canadian Neutron Beam Centre under Experiment number 1258.
Funder references
Engineering and Physical Sciences Research Council (EP/H022309/1)
Engineering and Physical Sciences Research Council (EP/M005607/1)
EPSRC (1504226)
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1007/s11661-017-4336-y
This record's URL: https://www.repository.cam.ac.uk/handle/1810/273332
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