About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-9: Investigating the Thermomechanical Processing Limits of Tungsten-Containing Refractory Compositionally Complex Alloys (R-CCAs) |
| Author(s) |
Andrew Boyd, Carla J.C. Nochesda, Eric Lass |
| On-Site Speaker (Planned) |
Andrew Boyd |
| Abstract Scope |
Tungsten-bearing Refractory Compositionally Complex Alloys (R-CCAs) are essential for next-generation extreme-environment applications, yet they remain notoriously difficult to process. Systematic thermomechanical processing (TMP) of these systems is almost non-existent in current literature. This study seeks to bridge this gap by mapping the microstructural response of tungsten-containing RCCA system across a gradient of cold-work intensities.
While preliminary success has been achieved through 35% thickness reduction followed by high-temperature annealing for alloys in the HfNbTaTiZr family, the lower limits of this processing window remain undefined for tungsten-containing RCCAs. This research characterizes the evolution of the microstructure at 15%, 25%, and 30% cold work. By analyzing grain morphology and phase stability, we aim to identify the critical deformation threshold required to overcome the inherent lattice resistance of Tungsten. Furthermore, we address the chemical interaction between the alloy and encapsulation materials at 1200°C to define the environmental constraints for heat treatment. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Characterization, High-Temperature Materials, |