|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Tungsten grain optimization and composite fabrication for use in fusion reactors
||Lauren M. Garrison, John Echols, Nathan Reid
|On-Site Speaker (Planned)
||Lauren M. Garrison
Tungsten will be a plasma-facing material in future fusion reactors. Its properties, mechanical and gas retention especially, depend heavily on its processing history including grain size and dislocation density. To form a full plasma-facing component, tungsten must be joined with other materials, which can further alter its microstructure. This work’s purpose is twofold: 1) examine tungsten with varying grain sizes and textures (powder sintered and rolled; forged; and e-beam additive manufactured), and 2) develop tungsten joints and composites relevant for fusion (W-SiC, W-Cu, and W-steel). The fabrication of the joints and composites will be described. Unirradiated materials were examined with scanning electron microscopy, electron backscatter diffraction, and miniature three-point bend tests. The mechanical properties are linked to the grain characteristics and/or interface properties. This development and characterization set the stage for the future neutron irradiation of these materials in the High Flux Isotope Reactor.
||Nuclear Materials, Composites, Joining