| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Solute Segregation and Precipitation Across Damage Rates in Dual Ion Irradiated T91 Steel |
| Author(s) |
Stephen Taller, Valentin Pauly, Zhijie Jiao, Gary S Was |
| On-Site Speaker (Planned) |
Valentin Pauly |
| Abstract Scope |
Dual ion irradiations using 5.0 MeV defocused Fe2+ ions and co-injected He2+ ions were conducted on ferritic-martensitic steel T91 to 17 dpa in a damage rate range 5×10-5 to 3×10-3 dpa/s at 445°C followed by characterization using scanning transmission electron microscopy. Ni/Si clusters and radiation induced segregation were quantified using energy dispersive x-ray spectroscopy (EDS) at each condition and compared with the same material in the as-received condition and irradiated in the BOR-60 reactor at 376°C. The density of Ni/Si clusters and magnitude of Ni and Si enrichments were found to decrease monotonically with damage rate. No significant Cr segregation was found with dual ion irradiation. Rate theory calculations suggest the increased recombination at higher ion damage rates reduced the segregation and Ni/Si cluster density compared to BOR-60. This work highlights the importance of irradiation damage rate when using ion irradiation to simulate reactor irradiation. |
| Proceedings Inclusion? |
Undecided |