About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior of Nuclear Reactor Materials and Components III
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Presentation Title |
Castable Nanostructured Alloy Steels and the Graded Transition to Tungsten for Fusion Reactors |
Author(s) |
Tim Graening, Isthiaque Robin, Ying Yang, Weicheng Zhong, Wei Tang, T.M. Kelsy Green, Kevin Field, Yutai Kato, Yutai Katoh |
On-Site Speaker (Planned) |
Tim Graening |
Abstract Scope |
Castable nanostructured alloy (CNA) steels were developed as improved reduced activation ferritic martensitic steels. Currently, a multi-ton-scale heat is being manufactured to demonstrate scale-up, initiate code qualification, and conduct in-depth radiation tolerance evaluations. Tensile properties up to 650 ºC and hardness measurements were conducted for qualification of the as-produced material. Relatedly, to be useful, the CNA steel needs to be joined to plasma-facing materials like tungsten required in divertors in fusion reactors. Here, a novel transitional multilayer structure joining CNA and tungsten was investigated. Each interlayer was selected based on computational thermodynamics and diffusion kinetics to prevent the formation of a brittle intermetallic phase region in the temperature range of 620~1150 ºC. Nano hardness measurements across the multilayered interfaces of SPS samples were performed and analyzed in comparison to nano hardness results of direct energy deposition additively manufactured gradients. The microstructure was investigated to explain the mechanical properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Joining, Iron and Steel, Additive Manufacturing |