About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Grain boundary engineering in Ni- and Co-based alloys for aerospace and tooling |
| Author(s) |
Sophie Primig |
| On-Site Speaker (Planned) |
Sophie Primig |
| Abstract Scope |
I will summarize results on Ni-based superalloys and Co-based alloys for aerospace and tooling. Their complex grain boundary microstructures including crystallography, solute decoration, and Co-precipitation control their performance.
The high-temperature performance of Ni-based superalloys is achieved by their complex microstructures and decorated grain boundaries. Yet, processability and in-service properties continue to face challenges related to grain boundary cracking. I will discuss the roles of microalloying elements C, B and Zr in engineering grain boundary microstructures and properties.
Ru is often added to the binder of WC-Co hardmetals to improve mechanical properties. We studied the effect of Ru on the fcc (γ) to hcp (α) phase transformation in Co-Ru alloys. Ru stabilizes the γ-phase and promotes formation of low-energy (0001) α/γ interphase and α/α symmetrical tilt boundary planes. Nanohardness shows the dominant role of α/γ interfaces in controlling mechanical properties, hence, increasing their population is essential for making superior tools. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, High-Temperature Materials, Characterization |