| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
High Temperature Stabilization of Nanostructured Tungsten Alloys Through Synergistic Compositional Complexities |
| Author(s) |
Nicholas Olynik, Cormac Killeen, Sean Mascarenhas, David J. Sprouster, Jason Trelewicz |
| On-Site Speaker (Planned) |
Nicholas Olynik |
| Abstract Scope |
Thermal stabilization of nanostructured tungsten is desirable to harness the enhanced properties of refined grain sizes while mitigating the adverse effects of recrystallization under extreme environments. In this study, we utilized a unique nanostructure alloy design strategy where a W-Ti-Cr alloy is synthesized in a single phase nanocrystalline state, which upon annealing, produces chromium grain boundary segregation as well as dispersed TiC nanoprecipitates through reaction with carbon impurities. The combined effect of these compositional heterogeneities is stabilization of an ultrafine grained microstructure at high homologous temperatures after prolonged (i.e., >1 month) thermal aging. Employing the solute stabilized alloy powders and direct current sintering, bulk sintered nanostructured tungsten alloys are demonstrated along with an assessment of their high temperature stability, thermophysical properties, and their evolution with thermal aging. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, Phase Transformations |