| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
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Phase Transformations and Microstructural Evolution
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| Presentation Title |
As-Cast Microstructure of the Ni-Based Superalloy Rene N5 Fabricated via Lost-Wax Casting |
| Author(s) |
Rafal Cygan, Andrzej Trojan, Tomasz Szczech, Grzegorz Labaj, Jadwiga Pipala, Mateusz Orzel, Grzegorz Boron, Ewelina Halon, Pawel Koziol, Lukasz Rakoczy |
| On-Site Speaker (Planned) |
Rafal Cygan |
| Abstract Scope |
Ni-based superalloys are extensively used in turbine blades for modern aero-engines and gas turbines due to their exceptional high-temperature mechanical properties, superior creep and fatigue resistance, and excellent corrosion resistance. This study investigated the microstructure and mechanical properties of the nickel-based superalloy René N5 produced via investment casting. The casting's microstructure was systematically analyzed using thermodynamic simulations, X-ray diffraction, light microscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. The typical dendritic microstructure with considerable microsegregation of the alloying elements was revealed in produced castings. Dendritic regions consist of cubic-like secondary γ′ precipitates. In the interdendritic spaces additionally, primary γ′ precipitates and MC carbides were detected. Although the γ' phase is mostly responsible for improvements in thermo-mechanical properties, it also poses challenges during processing, making these alloys prone to crack formation and, consequently, expensive to cast and repair welding.
The authors gratefully acknowledge the funding by the National Centre for Research and Development Poland under grant FENG.01.01-IP.01-000E/23. |
| Proceedings Inclusion? |
Planned: |