About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Irradiation Testing: Facilities, Capabilities, and Experimental Designs
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Presentation Title |
Comparison between Ion and Neutron Irradiated Tungsten to Simulate Damage in Commercial Nuclear Fusion Reactors |
Author(s) |
Kieran Rivers, Adrien Couet, Junliang Liu, Andrew London, Dmitry Terentyev, Michael Moody, Paul Bagot, David Armstrong |
On-Site Speaker (Planned) |
Kieran Rivers |
Abstract Scope |
Tungsten is the main candidate for fusion reactor plasma facing components. More information is needed about how and why its properties degrade when subjected to fusion neutron irradiation. Since no source of fusion neutrons exist for studying microstructural changes in tungsten, this work uses high energy fission neutrons and self-ion irradiation. Both irradiations were at 800°C and have a final tungsten composition representing approximately one full power year of commercial fusion reactor transmutation products. Atom probe tomography was used to study the microstructures consisting of transmutant element clusters, precipitates and decorated dislocation loops. Nanoindentation was used to study the change in mechanical properties after irradiation. Whilst changes in hardness are similar in both ion and neutron irradiated samples, ion irradiation produced smaller voids and more diffuse clusters. The differing damage cascade in ion irradiation has caused dissolution of larger clusters compared to neutron irradiation, giving a differing hardening mechanism. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, High-Temperature Materials, Other |