Investigating the Dislocation-Driven Micro-mechanical Response Under Non-isothermal Creep Conditions in Single-Crystal Superalloys
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
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Schwalbe, C., Cormier, J., Jones, C., Galindo-Nava, E., & Rae, C. (2018). Investigating the Dislocation-Driven Micro-mechanical Response Under Non-isothermal Creep Conditions in Single-Crystal Superalloys. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 49 (9), 3988-4002. https://doi.org/10.1007/s11661-018-4764-3
The creep responses of the superalloy CMSX-4 under thermal cycling conditions (900-1050ºC) and constant load (200 MPa) was analyzed using TEM dislocation analysis and compared to the modelled evolution of key creep parameters. By studying tests interrupted at different stages of creep, it is argued that the thermal cycling creep rate under these conditions depends on the creation of interfacial dislocation networks and their disintegration by the -shear of dissimilar Burgers vector pairs.
The authors would like to thank Rolls-Royce plc and the Engineering and Physical Sciences Research Council (EPSRC) for financial support under the Strategic Partnership, Grant Numbers EP/H022309/1 and EP/H500375/1. E.I. Galindo-Nava would like to acknowledge the Royal Academy of Engineering for his research fellowship funding.
UNIVERSITY OF BIRMINGHAM (FB EPSRC) (EP/H022309/1)
External DOI: https://doi.org/10.1007/s11661-018-4764-3
This record's URL: https://www.repository.cam.ac.uk/handle/1810/283554
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/