| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Investigating the Oxidation Mechanisms of Polycrystalline Ni-based Superalloys at 800°C With Varying Ti:Ta Contents |
| Author(s) |
Frances Synnott, Dennis Premoli, Paraskevas Kontis, Lewis Owen, Howard Stone, Mark Hardy, Katerina Christofidou |
| On-Site Speaker (Planned) |
Frances Synnott |
| Abstract Scope |
The oxidation resistance of polycrystalline Ni-based superalloys is crucial for the development of next-generation jet turbine engines. Increasing engine efficiency leads to higher operating temperatures, which Ni-based superalloys must withstand. Oxidation resistance can be improved through compositional modifications to reduce mass gain and optimise the protective oxide scales formed during exposure to high temperatures. The co-additions of Ti and Ta in three powder-processed Ni-based superalloys were investigated through thermo-gravimetric analysis, microstructural characterisation of the forming oxide species through scanning electron microscopy and electron probe microanalysis. The bulk microstructures were characterised to understand the relative compositions of the γ, γʹ and carbide phases and their contribution to the oxidation performance using X-ray synchrotron diffraction and atom probe tomography. The results enabled the quantification of the co-additions on the oxidation resistance at 800°C. Supported by Rolls-Royce plc, SFI [18/EPSRC-CDT/3584] and EPSRC [EP/S022635/1]. Beamtime under EE9270 was used. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Other, High-Temperature Materials |