| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Characterising Lattice Misfit of Single Crystal Nickel-based Superalloys Using Monochromatic Synchrotron X-ray Diffraction |
| Author(s) |
Jessica Pitchforth, Howard Stone, Leigh Connor |
| On-Site Speaker (Planned) |
Jessica Pitchforth |
| Abstract Scope |
Measurements of lattice misfit between γ and γʹ phases of nickel-based superalloys are typically accomplished using diffraction-based methods. However, for single crystal superalloys time resolved studies of lattice evolution under thermal or mechanical cycles are difficult due to the time required to acquire reciprocal lattice point maps.
In this study, monochromatic synchrotron X-ray diffraction has been used to investigate evolution of lattice misfit during thermal treatment of the nickel-based superalloy CMSX-4®. Fundamental and superlattice reflections were obtained simultaneously due to sufficient breadth of the reciprocal lattice points and energy dispersion from the source.
Data analysis revealed the limitations of this set up for characterisating lattice misfit, which were associated with the relative movement of γ and γʹ reciprocal lattice points through the Ewald sphere. Whether this could be overcome with rocking of the samples was also evaluated. The relative methods of this approach compared with other techniques is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, |