|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Mechanical Properties, Damage and Morphology Details of Nanocrystalline and Ultrafine Tungsten Materials Exposed to Low Energy Helium and Heavy Ion Irradiation
||Osman El-Atwani, Erika Esquivel, Mert Efe, Jordan Weaver, Jason Trelewicz, Nathan Mara, Stuart Maloy
|On-Site Speaker (Planned)
Nuclear materials will be exposed to irradiation doses that can alter the mechanical properties of the materials and change their morphology. Among the solutions proposed to mitigate this irradiation damage is the use of ultrafine and nanocrystalline materials of high grain boundary density. Here, we present detailed in-situ and ex-situ irradiation studies on nanocrystalline and coarse grained tungsten exposed to helium and heavy ion irradiation. Challenges in quantifying the irradiation damage though conventional methods (eg. loop or bubble density measurements) are presented based on quantification outputs on different materials irradiated at different conditions. Nanomechanical property measurement is then introduced to quantify the irradiation damage by correlating mechanical property changes after irradiation with morphology which permitted distinguishing irradiation hardening from bubbles and interstitial loops. The effect of bubble loaded grain boundaries in nanocrystalline materials is presented which showed softening effect and detrimental changes to the mechanical properties.
||Planned: Supplemental Proceedings volume