|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Computational Materials Engineering for Nuclear Reactor Applications
||Cluster Dynamics Modeling of Damage Evolution in Iron Chrome Alloys
||Aaron Kohnert, Brian Wirth
|On-Site Speaker (Planned)
This study investigates the mechanisms controlling irradiation induced microstructural evolution in iron chrome alloys over a wide range of temperatures. Cluster dynamics is an expansion of simpler rate theory models which tracks the populations of defect clusters as they are produced in cascades, annihilate at sinks, or interact with one another to form observable radiation damage features such as dislocation loops and voids. Primary damage is introduced with a multiscale approach by using a database of molecular dynamics simulations of displacement cascades to implant damage as a distribution of defect clusters rather than a simple Frenkel pair approach. Insights from ab initio calculations, molecular dynamics studies, and experimental inference are combined to inform the fundamental properties of the clusters, such as mobility and configuration. The model can accommodate various assumptions about the kinetics of defect clusters including interaction with trapping sites and one dimensional diffusion of crowdion bundles.
||Planned: A print-only volume