| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Components
|
| Presentation Title |
Modeling the Effect of Helium Bubbles, Rigid Inclusions, and Grain Boundaries on Crack Initiation in Nickel |
| Author(s) |
Tung Yan Liu, Michael J. Demkowicz |
| On-Site Speaker (Planned) |
Tung Yan Liu |
| Abstract Scope |
In this work, we present molecular dynamics simulations of plastic deformation of nickel containing nano-scale helium bubbles, rigid inclusions, and grain boundaries. Our goal is to study how these microstructure features affect crack initiation. The models are built based on experimental characterization of defect structures in Ni-base alloy components irradiated during service in pressurized heavy water reactors. In particular, we examine dislocation nucleation and motion, deformation-induced changes in bubble shape, and slip band formation. We discuss the implications of our work for understanding the mechanism of deformation and fracture in irradiated materials, which aid lifetime predictions of nuclear reactor components. |
| Proceedings Inclusion? |
Planned: |