| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Components
|
| Presentation Title |
A Model for Dislocation Climb and Precipitate Interactions Applied to Creep in Ferritic Steel |
| Author(s) |
Aaron Kohnert, Laurent Capolungo |
| On-Site Speaker (Planned) |
Aaron Kohnert |
| Abstract Scope |
Creep deformation is a primary concern for structural materials, which can lead to rupture and is often accelerated by radiation in reactor conditions. In the present study, discrete dislocation dynamics is applied to examine the dislocation creep regime using a unique methodology developed to describe the 3d transport of point defects between dislocations in a general network. Accordingly, this model can address the kinetics of climb in both thermal and irradiation environments. The kinematics of motion by climb for both edge and mixed character dislocations are considered to allow a full description of the climb in tangled dislocation networks which may include junctions. These realistic networks are evolved at a variety of ambient temperatures and applied loads to simulate creep deformation. Creep rate, activity, and density recovery are compared between single phase material and crystals with varying second phase dispersions to quantify the contribution of precipitates to the creep strength. |
| Proceedings Inclusion? |
Planned: |