About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
|
| Presentation Title |
Emulation of Microchemical Evolution at High Doses in Neutron Irradiated 800H Using Dual Ion Irradiation |
| Author(s) |
Xingyu Liu, Antoine Waegaert, Xing Wang, Arthur T. Motta |
| On-Site Speaker (Planned) |
Xingyu Liu |
| Abstract Scope |
To accelerate the qualification of structural materials for advanced nuclear reactors and life-extended operating reactors, it is essential to emulate neutron damage at high doses using ion irradiation. Here, the austenitic 800H alloy is selected as a benchmark material to compare neutron-induced damage in face-centered cubic materials with dual ion irradiation (9MeV Fe and 3.42MeV He) up to 81 dpa. In neutron-irradiated samples, radiation-induced precipitates, e.g., M23C6, showed a tendency of increasing in size and decreasing in density with increasing dose. However, these precipitates were rarely observed in dual ion-irradiated samples likely due to the increased ballistic precipitate dissolution that increases linearly with dose rate. Similar radiation-induced segregation of various alloying elements Ni, Si, Ti, Al, P to grain boundaries and cavities was observed in both neutron- and ion-irradiated samples, with lower segregation near cavities due to reduced sink strength. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Iron and Steel, Characterization |