About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
Radiation Induced Segregation in Metallic Alloys: Insights from Phase Field Modeling |
| Author(s) |
Yitao Wang, Jacob Jeffries, Marie Thomas, Daniele Offidani, Suveen Mathaudhu, Emmanuelle Marquis, Enrique Martinez, Fadi Abdeljawad |
| On-Site Speaker (Planned) |
Yitao Wang |
| Abstract Scope |
The evolution of radiation damage is a major technical issue for the durable and safe operation of materials in nuclear power plants. Under irradiation of metallic alloys, the formation and evolution of point defects results in grain boundary (GB) radiation-induced segregation (RIS) due to force-flux coupling. Using a phase field (PF) model, we explore RIS in binary alloys by quantifying the impact of grain size and GB sink strength, a parameter used to quantify GB accommodation of point defects, on RIS profiles. As inputs, the PF model requires Onsager transport coefficients, which are obtained via atomistic Monte Carlo simulations. Simulation results reveal a strong dependence of GB solute excess on boundary sink strength. Under the same radiation conditions, the GB RIS profile is found to increase with grain size. In broad terms, our approach provides avenues to quantitatively describe RIS behavior and microstructure evolution of metallic alloys under radiation conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Nuclear Materials |