About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Transmutation Effects in Materials in Fission, Fusion, and Spallation Environments
|
| Presentation Title |
The impact of carbon on structure and properties of radiation defects in W and WC. |
| Author(s) |
Timofey Frolov, Yang Li, Lance Snead, Yuri Mishin |
| On-Site Speaker (Planned) |
Timofey Frolov |
| Abstract Scope |
Tungsten-based alloys and tungsten carbides are considered promising candidates for plasma-facing and shielding components in fusion energy devices. Under irradiation, carbon can modify the structure, stability, and mobility of point defects and their clusters, while also segregating to tungsten grain boundaries and driving structural phase transformations that alter the grain boundary properties. To investigate defect behavior in tungsten and tungsten carbides, we developed a novel moment-tensor interatomic potential for the tungsten-carbon system that accurately describes tungsten, tungsten carbides, and their interfaces. Using atomistic simulations, we examine the energetics and evolution of point defects, defect clusters, grain boundaries, and tungsten-carbon interfaces, providing novel insights into how the carbon chemistry governs defect evolution and radiation tolerance in tungsten-based fusion materials. This work was conducted under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Modeling and Simulation, Mechanical Properties |