| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
The Role of Alloying Species on Radiation Tolerance of BCC Fe Binary Alloys |
| Author(s) |
Patrick Henry Warren, Caleb Denton Clement, Chao Yang, Yaqiao Wu, Janelle Wharry |
| On-Site Speaker (Planned) |
Patrick Henry Warren |
| Abstract Scope |
The objective of this study is to understand the effect of alloying species on irradiation tolerance in BCC Fe. BCC Fe forms the basis of radiation-tolerant steels for advanced nuclear structural and cladding applications, but little is known about how alloying species affect irradiation tolerance. Here, model binary alloys Fe-9Cr, Fe-2P, Fe-2.3N, and Fe-1.25Mo (at%) were irradiated to 8.5 dpa by 4.5 MeV Fe++ ions at 653 K. Transmission electron microscopy (TEM) evaluated the irradiated microstructures, and nanoindentation evaluated mechanical properties. The Fe-P alloy had a dense dispersion of radiation-induced defects including nanoclusters and dislocation loops, while the other alloys had a lower density of larger loops and dislocation lines. Molecular dynamics simulations confirm a higher defect density in Fe-P. This is attributed to the strong trapping of point defects such as self-interstitial atoms (SIAs) by undersized P atoms. Results are discussed in the context of atomic size factors. |
| Proceedings Inclusion? |
Undecided |