About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components III
|
Presentation Title |
Simulating Irradiation Induced Creep with Coupled Rate Theory and Plasticity Models |
Author(s) |
Aaron Kohnert, Laurent Capolungo |
On-Site Speaker (Planned) |
Aaron Kohnert |
Abstract Scope |
Creep deformation can occur in radiation environments well below the temperatures and stresses where similar behavior is seen thermally. This work introduces a modeling framework capable of directly simulating irradiation induced creep by attaching a rate theory approach to treating vacancy and self-interstitial fluxes directly to a dislocation dynamics model to capture plastic flow. The simulations are fully resolved in 3d, and include the elastic interactions between point defects and dislocations which drive preferential partition of defects between sinks. From these simulations, we examine dislocation network morphologies and microstructure evolution in bcc Fe crept in both thermal and radiation environments. Additionally, quantitative flow rates are extracted at a variety of temperatures and stress levels, providing the expected magnitude of irradiation induced creep for a range of conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Mechanical Properties, Modeling and Simulation |