About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Developments in Advanced Nuclear Structural Materials
|
| Presentation Title |
Designing Irradiation-Tolerant TaTiVW Refractory High-Entropy Alloys With Defects Simulation and Heavy Ion Irradiation |
| Author(s) |
Stanley Chang |
| On-Site Speaker (Planned) |
Stanley Chang |
| Abstract Scope |
Body-centered cubic (BCC) single-phase solid-solution Refractory high-entropy alloys (RHEAs), comprising Ta, Ti, V, and W, are proposed as candidate structural materials for nuclear fusion, subject to specific downselecting constraints. The primary focus of this research lies in investigating the defect recombination capability under the hypothesis that variations in the potential energy landscape (PEL) determine the irradiation tolerance of RHEAs. Molecular Dynamics (MD) will optimize the composition of RHEAs to achieve the most PEL heterogeneity. Heavy self-ion irradiation will then be employed to compare various samples and validate the simulation findings. To ensure consistent defect mobility, the irradiation temperature will be maintained at one-third of each sample's homologous temperature (Tm). Additionally, In situ ion irradiation transient grating spectroscopy (I3TGS) and Transmission Electron Microscopy (TEM) will be employed to evaluate thermal elastic properties and microstructures to assess radiation-induced damage. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Entropy Alloys, High-Temperature Materials |