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 |
Opportunities, Lessons Learned, and Challenges From 718Plus Structures on Latest Generation Aero- Engines |
| Author(s) |
Jeffrey L. Williams |
| On-Site Speaker (Planned) |
Jeffrey L. Williams |
| Abstract Scope |
Given the broad participation of aero-engine original equipment manufacturers (OEMs) in the development of alloy 718Plus, initial component applications were identified and introduced to product closely following qualification and certification as a new superalloy material. These initial applications were re-designed versions of existing engine components that had been originally manufactured using other superalloys, such as Waspaloy and Udimet 720, and offered technical and economic advantages upon insertion. Based upon the success of 718Plus in these early components, ranging from large structural casings to high-pressure compressor airfoils, the alloy was considered for broader application in the new product development cycle for next-generation aero-engines that followed. Several new engine components were designed with 718Plus properties in view, including several complex multi-alloy fabricated structures as well as life-limited pressure vessel casings. This article will describe 718Plus alloy application experiences and challenges resolved in these latest generation of aero-engines. These include the introduction of new product forms, ensuring microstructure and property stability through joining and heat treat of fabricated structures, and understanding challenges of environmental interactions with high-temperature fastener lubricants. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |