|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||Defect Evolution and Radiation Resistance of Advanced Fusion Materials Under Heavy Ion and Low Energy Helium Irradiation
||Osman El-Atwani, Stuart Maloy
|On-Site Speaker (Planned)
The degradation of the morphology and mechanical properties of helium and neutron irradiated tungsten stimulated recent research on the discovery of new and irradiation resistant plasma facing and structural materials for fusion power. Here we present a summary of the performance of nanocrystalline W and ultrafine W-TiC alloys under heavy ion (to simulate neutron damage) and low energy helium (to simulate transmutation reactions) irradiation performed in-situ in the TEM. Defect (dislocation loops and bubbles) evolution (density, size and total damage) as a function of time (dose) is illustrated. Conclusions were supported from the in-situ irradiation/TEM videos where the dynamic response (defect dynamics) is observed directly. Interpretation of the experimental results with theory is made and emphasized the need of advanced modeling and simulations to fundamentally understand the performance of these materials and design radiation resistant fusion materials.