| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Micromechanical Investigation of Defects in Single Crystal Ni-Based Superalloys |
| Author(s) |
Felicitas Werner, Janine Pfetzing-Micklich, Aleksander Kostka, Jan Frenzel, Gunther Eggeler |
| On-Site Speaker (Planned) |
Felicitas Werner |
| Abstract Scope |
The work investigates the effects of crystal defects in single crystal Ni-based superalloys (SX) on micromechanical behavior. It is well known that SX can contain defects such as low angle grain boundaries (LAGBs) and primary γ̓-particles. It is not clear how these defects affect mechanical behavior. In the present work, an effort was made to tackle this topic. We combine advanced scanning electron microscopy (SEM), high resolution cross-correlation electron backscatter diffraction (EBSD) and an in-situ SEM micro-cantilever technique, which allows to mechanically probe small microstructural regions. The obtained load-displacement curves reveal elastic-plastic deformation behavior and feature load drops associated with formation of a slip bands. It was observed that primary γ̓-particles particles, which are often considered as brittle phases, in fact show ductile behavior. The presence of LAGBs can result in lower yield strengths, which suggests that they may act as dislocation sources during deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Solidification, High-Temperature Materials |