Abstract
To continue improving alloy performance in harsh service environments, the development of alumina-forming nickel-based superalloysNickel-based superalloy is essential. Current generations of these alloys heavily rely on the addition of refractory elements to enhance their mechanical propertiesMechanical propertiesat high temperaturesHigh temperature oxidation; however, a systematic understanding of how such additions affect the overall oxidationOxidation behavior is still not well established, particularly from the standpoint of predicting the transition from internal to external alumina formation. The present work seeks to better understand the intrinsic effects that common minor additions of Ta and Nb have on the oxidationOxidation behavior of alumina-scale-forming γ-Ni model alloysModel alloy. By combining a novel simulation approach with high-temperatureHigh temperatureoxidationOxidation experiments and advanced characterization techniques, the present study provides insightful details on the differing effects that 2 at. % addition of Ta and Nb have on the alumina scale formation of Ni-based alloysNi-based alloy during 1100 °C oxidationOxidation.
Original language | English |
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Title of host publication | Superalloys 2024 - Proceedings of the 15th International Symposium on Superalloys |
Editors | Jonathan Cormier, Ian Edmonds, Stephane Forsik, Paraskevas Kontis, Corey O’Connell, Timothy Smith, Akane Suzuki, Sammy Tin, Jian Zhang |
Publisher | Springer Science and Business Media Deutschland GmbH |
Pages | 587-597 |
Number of pages | 11 |
ISBN (Print) | 9783031639364 |
DOIs | |
State | Published - 2024 |
Event | 15th International Symposium on Superalloys, ISS 2024 - Pennsylvania, United States Duration: Sep 8 2024 → Sep 12 2024 |
Publication series
Name | Minerals, Metals and Materials Series |
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ISSN (Print) | 2367-1181 |
ISSN (Electronic) | 2367-1696 |
Conference
Conference | 15th International Symposium on Superalloys, ISS 2024 |
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Country/Territory | United States |
City | Pennsylvania |
Period | 09/8/24 → 09/12/24 |
Funding
This research used Electron Microscopy resources of the Center for Functional Nanomaterials (CFN), which is the U. S. Department of Energy Office of Science User Facility, at Brookha-ven National Laboratory under Contract No. DE-SC0012704.
Keywords
- High-temperature oxidation
- Ni-based superalloys
- Niobium
- Tantalum