About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Materials Systems for the Future of Fusion Energy
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Presentation Title |
In-situ TEM of the Microstructure and He Behavior of AM W Alloys |
Author(s) |
Eric Lang, Ian McCue, W.S. Cunningham, Jason Trelewicz, Khalid Hattar |
On-Site Speaker (Planned) |
Eric Lang |
Abstract Scope |
Tungsten-base materials are the plasma-facing materials (PFMs) of choice for future fusion devices for their high Z and melting point. Future reactor designs are expected to require complex additively manufactured (AM)components, which poses processing challenges for tungsten. AM-W components are riddled with cracks due to solidification, cooling shrinkage, and passing through its ductile-to-brittle transition. This team has successfully fabricated dense, low-defect AM-W by developing custom AM alloy formulations. Unlike traditional wrought processing, W is fully melted during AM, which drives the formation of new microstructures with nanoscale, second-phase inclusions. In addition to increasing mechanical strength, these inclusions can potentially increase the material’s radiation-damage tolerance. In this talk, we present multiscale SEM and TEM microstructural characterization of these new materials. In addition, we carry out in-situ TEM irradiation and heating to probe the real-time incubation behavior of He bubbles.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Nuclear Materials, Characterization |