|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Multiscale Modeling of Defect Cluster Evolution in Irradiated Structural Materials
||Brian Wirth, Aaron Kohnert, Donghua Xu
|On-Site Speaker (Planned)
Irradiation effects impact structural materials performance in nuclear environments. Irradiation effects initiate from displacement cascades, and are ultimately determined by the diffusional transport and fate of point defects and their clusters, along with solute and impurity re-distribution. This presentation will introduce the inherently multiscale nature of irradiation effects in materials and describe a multiscale research paradigm based on close integration of materials modeling and experimental characterization. Results will be presented from in-situ ion irradiation studies of thin film materials in the transmission electron microscope of molybdenum and ferritic/martensitic steels. In this effort, spatially dependent cluster dynamics models, which are informed by lower length scale understanding of cascade dynamics and defect cluster behavior, are shown to be in good agreement with the fine details of the dose, dose rate and sample dimension dependencies of the defect density and size distribution observed experimentally for low dose irradiation.
||Planned: A print-only volume