|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Materials Science and Engineering for Nuclear Energy
||Discrete Dislocation Sinks in Spatially Resolved Cluster Dynamics Simulations
||Aaron Kohnert, Laurent Capolungo
|On-Site Speaker (Planned)
In mean field rate theory based models for predicting the microstructural response of materials to radiation exposure, dislocation sinks are typically represented as a homogeneous absorbing medium. The preferential transport of self interstitial defects to these sinks due to elastic interactions is similarly homogenized through a bias factor computed for idealized environments with simple boundary conditions or inferred from experimental data. We have developed a novel method to localize point defect absorption to discrete dislocations in spatially resolved rate theory based simulations, such as cluster dynamics, allowing the drift diffusion of point defects to be solved explicitly for general arrangements of dislocations. It is demonstrated that this method produces accurate biases and defect concentration profiles in the idealized cases for a wide range of interaction strengths. The method is also applied to more complex dislocation microstructures, and we discuss the spatially resolved defect cluster evolution in comparison to homogenized systems.
||Planned: Supplemental Proceedings volume