|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||Linking Defect Structure and Property Evolution in Ion-irradiated Tungsten: A Multi-facetted View
||Felix Hofmann, Suchandrima Das, Hongbing Yu, Mohamed Abdallah Reza, Daniel R. Mason, Sergei L. Dudarev
|On-Site Speaker (Planned)
Tungsten is one of the main candidate materials for future fusion reactor armor components. It is also an attractive model system for trying to gain fundamental insight into the link between irradiation-induced defects and the changes in structure, mechanical and physical properties they bring about. For helium and self-ion-implanted tungsten we have characterized irradiation-induced changes in lattice strain (using X-ray micro-diffraction), elastic properties (using surface acoustic waves), plastic deformation behavior (using nano-indentation) and thermal transport properties (using transient grating spectroscopy) as a function of exposure conditions. Using an array of different simulation tools (density functional theory calculations, molecular dynamics simulations, crystal plasticity modelling, kinetic theory thermal transport calculations) the measured changes can be quantitatively linked to the underlying irradiation-induced defects. Combining all this information, a coherent picture of the multi-facetted nature of irradiation-induced changes in tungsten begins to emerge.