| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Introducing Damage Gradient in Hastelloy N by 2 MeV Proton Irradiation and Mapping of Corrosion Susceptibility in FLiNaK |
| Author(s) |
Michenna Allen, Kenneth Cooper, Kyle Williams, Rijul Chauhan, Lin Shao |
| On-Site Speaker (Planned) |
Michenna Allen |
| Abstract Scope |
Understanding the effect of radiation damage on the corrosion of molten salt reactor (MSR) structural materials is important for MSR deployment. In the present study, Hastelloy N was irradiated by a 2 MeV proton beam to different damage levels at 600°C, then immersed in FLiNaK salt at 700°C for 100 hours. The proton irradiation was performed with gradually increasing slit width, producing a damage gradient on the sample in discrete values of 0, 0.5, 1, 1.5, and 2 displacements per atom (dpa). With this high-throughput approach, the effect of radiation damage on corrosion behavior can be studied with minimized uncertainty. After the corrosion testing, the sample was cut and cross-sectionally polished. Scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS) mapping, and transmission electron microscopy were performed to compare Cr dissolution, cracking morphology, elemental segregations, and radiation-damage induced microstructural changes at different locations, with an effort to link these to cracking susceptibility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Environmental Effects, |