| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
|
| Presentation Title |
High-resolution Characterization of Grain Boundary Precipitates and Their Interfaces in Ni-based Superalloys with B and C Additions |
| Author(s) |
Felix Theska, Richard Buerstmayr, Michael Lison-Pick, Steven Street, Sophie Primig |
| On-Site Speaker (Planned) |
Felix Theska |
| Abstract Scope |
Cast & wrought Ni-based superalloys are high-temperature materials for aerospace and power generation applications. René 41 provides the high-temperature strength required for next generation aircraft engines, but wider applications are limited by grain boundary cracking and insufficient grain size control.
Alloy design utilizing B & C additions can mitigate grain boundary cohesion and grain boundary pinning. However, complex precipitation reactions may have opposing effects. Thus, more detailed studies are required to understand the impact of B & C additions on grain boundary microstructure and properties.
In the present work, René 41 variants with C & B additions are designed to study their hot workability during industrial-scale hot rolling. Electron microscopy reveals the grain boundary microstructure. Site-specific atom probe microscopy reveals the composition of precipitates and their interfaces. Thermodynamic modeling underpins experimental findings. These insights establish pathways to alloy design of future superalloys with improved hot workability and grain size control. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Phase Transformations |