About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
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Presentation Title |
L-50: Towards a Novel Approach for Integrating Tungsten and Reduced Activation Ferritic Martensitic Steel for Fusion Reactors |
Author(s) |
Ishtiaque Robin, Tim Graening, Ying Yang, Yutai Katoh, Steven Zinkle |
On-Site Speaker (Planned) |
Tim Graening |
Abstract Scope |
Joining plasma-facing material tungsten and structural material ferritic/martensitic (FM) steel for fusion reactors is challenging. A novel transition layer design is proposed here to integrate tungsten and FM steel with the insertion of interlayers VCrTi, VCrAl, and FeCrAl which would minimize the coefficient of thermal expansion gradient and avoid formation of brittle intermetallic phases. Preliminary data confirms the existence of fully body-centered cubic structure throughout the spark plasma sintering (SPS)-produced diffusion-bonded transition structure. Upon annealing at fusion relevant temperature 620 °C for up to 1000 hours, formation of brittle intermetallic and delamination are avoided. Results from first annealing tests were used to optimize chemical composition for second set of experiments. After subjecting to different annealing conditions, extensive microstructure characterization was performed on SPS-produced transition structure with modified composition. Experimental diffusion profiles are used to modify mobility database which was used for diffusion simulation to design this novel transition structure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Joining, Characterization, Nuclear Materials |