| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Effect of Damage Rate and Cascade Size on α' Precipitate Stability in Fe-15Cr |
| Author(s) |
Katey N. Thomas, Zhijie Jiao, Gary Was |
| On-Site Speaker (Planned) |
Katey N. Thomas |
| Abstract Scope |
Fe-Cr ferritic-martensitic (F-M) steels are candidates for nuclear reactor structural components due to their high resistance to swelling and corrosion. However, these steels are susceptible to Cr-rich α’ precipitate formation at low to intermediate temperatures in thermal and irradiation environments. In this study, the effects of damage rate and cascade size on α’ precipitate stability is determined using a steady state α’ precipitate population formed by 2 MeV proton irradiation at 1x10-5 dpa/s to 1 dpa at 400°C. Samples were then subjected to further irradiation, varying the damage rate and cascade size using self-ion, proton, and electron irradiation up to 10 dpa at 400°C. Atom probe tomography (APT) analysis was used to assess precipitate size, number density, volume fraction and Cr content. Results are used to determine the ballistic dissolution factor and to unfold the roles of cascade size and damage rate on α’ stability. |
| Proceedings Inclusion? |
Undecided |