About this Abstract |
| Meeting |
11th International Symposium on Superalloy 718 and Derivatives 2026: Legacy, Innovations, and Future Directions
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| Symposium
|
Superalloy 718 and Derivatives 2026: Legacy, Innovations, and Future Directions
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| Presentation Title |
High Temperature Oxidation Resistance, Mechanical Properties and Microstructural Stability of the New Fabricable Ni-Based ATI 273™ Superalloy |
| Author(s) |
Matthew D. Bender, Rafael Rodriguez De Vecchis, Joseph A. Jankowski |
| On-Site Speaker (Planned) |
Matthew D. Bender |
| Abstract Scope |
The development of fabricable superalloys with high temperature strength and environmental resistance has long presented a challenge. In particular, the development of alumina-forming Ni-based superalloys has historically required sacrificing creep strength and fabricability in exchange for improved environmental resistance above 982 °C, limiting their applications. Originally developed as a precipitation-hardened chromia former, ATI 273™ alloy was found to also exhibit the formation of a protective, continuous alumina layer at temperatures above 1038 °C while simultaneously exhibiting improved strength and fabricability characteristics compared to conventional alumina-forming alloys. To assess the performance of the newly developed Ni-based ATI 273™ superalloy compared to other legacy Ni-based superalloys, its oxidation resistance, mechanical properties and microstructural stability from a 9-metric-ton production heat were investigated and compared to ATI 263™, ATI 6230™, ATI 718™, ATI 617™, Haynes® 282®, Haynes® 214® and Haynes® 233® alloys. Results indicate ATI 273™ alloy exhibits a unique combination of properties making it attractive for applications requiring long-term service at temperatures between 760 and 1149 °C. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |