| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments III
|
| Presentation Title |
Defect Structure and Property Evolution in Ion-irradiated Tungsten: Progress towards a Comprehensive Understanding |
| Author(s) |
Felix Hofmann, Daniel R. Mason , Abdallah Reza, Suchandrima Das, Hongbing Yu, Sergei L. Dudarev |
| On-Site Speaker (Planned) |
Felix Hofmann |
| Abstract Scope |
Tungsten is a promising candidate for future fusion reactor armor components. It is also an attractive model system to gain fundamental insight into the link between irradiation-induced defects and the changes in mechanical and physical properties they bring about. We consider self-ion-implanted tungsten exposed to damage levels from 0.0001 dpa (low dose limit) to 10 dpa (high dose limit). We have characterized the evolution of lattice strain (using X-ray micro-diffraction and electron 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 damage dose. 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 how irradiation changes tungsten begins to emerge. |