| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
Advancing Characterization of Co/Ni-based Superalloys with Statistics using Correlative Electron Diffraction and X-ray Spectroscopy |
| Author(s) |
Tom McAuliffe, Alex Foden, Chris Bilsland, Dafni Daskalaki Mountanou, David Dye, Thomas Benjamin Britton |
| On-Site Speaker (Planned) |
Thomas Benjamin Britton |
| Abstract Scope |
Understanding carbides in Co/Ni-based superalloys is important for high temperature creep and oxidation of next generation jet engines. We develop a new approach to classify carbide types in Co-based superalloys using maps which contain simultaneous energy dispersive X-ray spectroscopy (EDS) and electron backscatter diffraction (EBSD) data that has been captured in the SEM. These signals are combined and analysed using principal component analysis (PCA) followed by rotation of the components using multivariant statistical analysis to make physical analysis of each label more meaningful. Each characteristic signal labels a region of common chemistry (EDS) and structure (EBSD) and amplifies signal to noise. We use this to clearly separate FCC Co/Ni-matrix, M23C6, M2C, M6C and MC type structures in the Co/Ni-based alloys. Ultimately, our robust characterisation of these phases will help us understand the role of each carbide type in the high temperature performance of these materials and enable alloy design. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |