| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
|
| Presentation Title |
Plastic Deformation in Nickel Bicrystals Containing Helium Bubbles |
| Author(s) |
Tung Yan Liu, Michael J. Demkowicz |
| On-Site Speaker (Planned) |
Tung Yan Liu |
| Abstract Scope |
We present molecular dynamics simulations of plastic deformation of nickel (Ni) bicrystals containing nano-scale helium bubbles. The models are based on experimental characterization of defect structures in Ni-base alloy components irradiated during service in pressurized heavy water reactors. We examine dislocation nucleation and motion, slip band formation, deformation-induced changes in bubble shape, as well as slip interactions with grain boundaries. We also assess how these behaviors are affected by the introduction of a rigid inclusion at a grain boundary. The implications of our work for understanding the lifetime and performance of Ni-base components in nuclear fission applications are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Modeling and Simulation, Nuclear Materials |