| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
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Advances in the State-of-the-Art of High Temperature Alloys
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| Presentation Title |
Property-microstructure Evaluation of L-PBF Ni-based Superalloy Candidates for Industrial Gas Turbine (IGT) Fuel Injectors |
| Author(s) |
Chantal K. Sudbrack, Kyle A. Rozman, Rui Feng, Lucas Teeter, Yoosuf N Picard, Martin Detrois, Anand Kulkarni, Ramesh Subramanian |
| On-Site Speaker (Planned) |
Chantal K. Sudbrack |
| Abstract Scope |
Laser powder bed fusion (L-PBF) additive manufacturing is emerging as a legitimate, cost-competitive manufacturing tool for geometrically complex components in high performance applications, including IGT fuel injectors fabricated from Ni-based superalloys. The materials suitability and performance of injector candidates, L-PBF Haynes 282, Alloy 625, and Alloy 718, are being evaluated for service up to 815C. Various properties are being screened and compared at relevant service conditions for temperatures between 550 and 815°C to determine suitability, including: tensile strength, creep resistance, low-cycle fatigue, environmental resistance, and susceptibility to hydrogen embrittlement by slow strain rate tensile testing. Optimized processing led to fully dense material with consistent tensile behavior after standard heat treatments. Two candidates recrystallized fully and had comparable creep performance to conventionally processed, whereas a third candidate underperformed in creep and exhibited restrained grains. Environmental response will be discussed given observed microstructures and alloy composition. This work is supported by NETL-FWP-1022408 Advanced Turbines. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Additive Manufacturing, Mechanical Properties |