| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
|
| Presentation Title |
Effect of Free Surface on Displacement-cascade Damage in Neutron Irradiated Nickel |
| Author(s) |
Michele L. Fullarton, Giridhar Nandipati, Ram Devanathan, David Senor |
| On-Site Speaker (Planned) |
Michele L. Fullarton |
| Abstract Scope |
During reactor operation, the production of point defects from displacement cascades due to energetic neutron-atom collisions and their accumulation rapidly degrades the physical and mechanical properties of Nickel (Ni) and its alloys. In this study, we explored the differences in the cascade dynamics in the bulk and the near-surface region in pure Ni using molecular dynamics simulations, as a function of temperature (300, 425 and 525 K) and primary-knock-on atom (PKA) energy (1 to 10 keV). Additionally, the depth and direction of PKAs in the near-surface region were studied. In all cases, PKA direction significantly impacted the count and size distribution of surviving defect clusters. We will present a detailed analysis of cascade dynamics and point defect production to illustrate the influence of a free surface. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Nuclear Materials, Other |