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 |
Nickel Superalloy Composition and Process Optimization for Improved Weldability |
| Author(s) |
Anna Holland, Jamie McIntyre, Jonah Klemm-Toole, Paul G. Sanders |
| On-Site Speaker (Planned) |
Paul G. Sanders |
| Abstract Scope |
In order to improve the efficiency of advanced ultra-supercritical power plants, hotside materials must be designed to maintain mechanical properties in high pressure and high temperature environments. Nickel superalloys are a viable yet expensive option, but welding challenges can lead to premature joint failures. The goal of this work is to experimentally evaluate computationally-designed nickel superalloys for improved weldability and lower alloy cost, while maintaining mechanical properties. Two optimized nickel alloys were designed to these targets and compared to benchmark nickel superalloys. Both optimized alloys had lower cost, with a 5Co-4Ti alloy exceeding room temperature hardness and elastic modulus values while a 7Co-3Ti alloy maintained elastic modulus values and room temperature hardness. Hot hardness, solidification cracking, and strain age cracking were assessed and compared to benchmark alloys. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |