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- Title
Oxidation-Related Microstructural Changes at a Crack Tip in Waspaloy After Elevated-Temperature Dwell-Fatigue Testing.
- Authors
Viswanathan, G. B.; Mills, David E.; Mills, Michael J.
- Abstract
Using advanced aberration-corrected scanning transmission electron microscopy coupled with high-resolution energy-dispersive spectroscopy techniques, transitions to microstructure and composition occurring at a grain boundary (GB) crack-tip in Waspaloy after dwell-fatigue at 704 °C are characterized at the nano to atomic scale. The simple microstructure of this γ/γ′ superalloy, which enables elucidation of oxygen effect ahead of the oxide intrusion—dissolution of the precipitates fostering selective segregation of Al to the GB to form oxides—has been experimentally observed.
- Subjects
SCANNING transmission electron microscopy; CRYSTAL grain boundaries
- Publication
Metallurgical & Materials Transactions. Part A, 2019, Vol 50, Issue 12, p5574
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-019-05499-0