About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interrelated Extremes in Materials Degradation for Fission and Fusion Environments
|
| Presentation Title |
Integrated Model of Grain Growth in Tungsten Armor Materials Under ARC Plasma Edge Operation Conditions |
| Author(s) |
Jinxin Yu, Jaime Marian, Brian Wirth, Lauren Garrison, Nithin Mathew, Sophie Blondel, Ane Lasa, Jon Hillesheim |
| On-Site Speaker (Planned) |
Jinxin Yu |
| Abstract Scope |
Structural materials in fusion power plants must withstand extreme
conditions, particularly in the divertor, where exposure to hydrogen isotopes (H/D/T) leads to hydrogen infiltration and interaction with the material’s microstructure. Direct measurement of internal hydrogen profiles during plasma exposure is highly challenging, and the relationship between hydrogen concentration and grain growth remains unclear. Here, we perform vertex dynamics simulations of grain growth in plasma-exposed polycrystalline tungsten (W), adapting a recrystallization model to the conditions expected in an ARC-class power plant from Commonwealth Fusion Systems. While operational parameters for ARC’s divertor are being defined, surface material choices and design specifics are still in development. Our simulations use boundary conditions informed by recent studies of deuterium-exposed W surfaces under ARC-relevant conditions. This work helps establish realistic expectations for material performance and provides insights into hydrogen-driven microstructural evolution in fusion environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Nuclear Materials, Computational Materials Science & Engineering |