| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
|
| Presentation Title |
Using Ion Irradiation as a Surrogate for Neutron Radiation: Credibility, Issues, and Mitigation |
| Author(s) |
Lin Shao, Frank A Garner |
| On-Site Speaker (Planned) |
Lin Shao |
| Abstract Scope |
This talk reviews the challenges, issues, and mitigation strategies in experimental design, data interpretation, and modeling of accelerator-based ion irradiation as a surrogate for reactor neutron damage. The key question is whether flux differences cause transient shifts or maximum swelling temperature shifts in void swelling, as two models are still debated in the field. No neutron experiments reported so far support the maximum swelling temperature shifting model, while all evidence of maximum swelling temperature shifts comes from ion irradiation, likely due to the injected interstitials effect, which depends on temperature and flux. The talk covers recent methodology developments to identify safe analysis zones and mitigate artifacts by avoiding affected regions. Finally, it summarizes homogeneous void nucleation theory as a basis for predicting transient shifts under various flux conditions, providing guidance for experimental design to bridge the gap between ion and neutron irradiations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Modeling and Simulation |