| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Systems for the Future of Fusion Energy
|
| Presentation Title |
Microstructural Transitions during Powder Metallurgical Processing of Solute Stabilized Nanostructured Tungsten Alloys |
| Author(s) |
Sean Mascarenhas, David Sprouster, Chad Parish, Jason Trelewicz |
| On-Site Speaker (Planned) |
|
| Abstract Scope |
Grain size refinement and the introduction of compositional complexities provide unique opportunities for tungsten, which while largely considered to be the primary divertor armor material for future fusion devices, remains limited by instabilities under extended exposure to the anticipated harsh conditions of the fusion environment. Here, we present a synergistic alloy design strategy for combating structural instabilities in tungsten and characterize the microstructural transitions during powder metallurgical processing of bulk nanostructured tungsten alloys. Through lattice Monte Carlo modeling, we map compositional complexities in the W-Ti-Cr system and their dependence on temperature. Using these design maps, a series of ternary nanostructured tungsten alloys are subsequently synthesized through high energy ball milling with microstructural evolution characterized through synchrotron x-ray diffraction. Finally, we demonstrate bulk alloy synthesis through field assisted sintering and show that the deliberately designed tungsten alloys consolidate to near-full density at markedly reduced sintering temperatures relative to pure coarse-grained tungsten. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Powder Materials, Characterization |