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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Refractory Metals
Presentation Title Tungsten Grain Optimization and Composite Fabrication for Use in Fusion Reactors
Author(s) Lauren M. Garrison, John Echols, Nathan Reid
On-Site Speaker (Planned) Lauren M. Garrison
Abstract Scope 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.
Proceedings Inclusion? Planned:
Keywords Nuclear Materials, Composites, Joining


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Design of BCC High-entropy Alloys with Low Neutron Absorption Cross-section
Design of MoWTaTiZr Refractory Multi-principal Element Alloys
Development of Heat-treatable Crss-Cr3Si-based Alloys: Microstructure, Oxidation, and Creep
Development of Novel Chromium-superalloys Strengthened by B2 Intermetallic Precipitates
Effect of Heating Rate and Substrate on the Oxidation Behavior of Hafnium Aluminum Diboride Thin Films
Flow Behavior and Associated Microstructures of Niobium at 1200 to 1500°C
Grain Boundary Doping as Effective Method to Improve Mechanical Properties in Ultra-fine Grained Tungsten
Grain Boundary Segregation Engineering in Technically Pure Molybdenum Examined via Three-point Bending Tests
High-throughput Engineering of Oxidation Behavior in Complex Refectory Alloys
NanoPhase Separation Sintering in Mo and Mo-W Based Systems
Nanostructured Tungsten Alloys for Nuclear Fusion
Oxidation Behavior of Mo-Si-B-Al Alloys at Elevated Temperature
Platinum-based Superalloys: Combating High Temperatures and Aggressive Environments
Realizing Sub-micron Tungsten and Tungsten Composite Microstructures via Deformable Punch Spark Plasma Sintering
Refractory High Entropy Alloys for Applications in Extreme Environments
Studies on the Phase Formation of Cobalt Contacted with Zinc Vapour
Sustainability-based Selection of Materials for Refractory High Entropy Alloys
Tensile Properties of Molybdenum & ODS MoLa Sheet at Elevated Temperatures
The Influence of Impurities on the Interfacial Chemistry of Niobium – Alumina High-temperature Refractories
Thermal Stability of Thin Rolled Potassium-doped Tungsten Sheets at Temperatures between 1100 C and 1400 C
Tungsten Grain Optimization and Composite Fabrication for Use in Fusion Reactors

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