About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
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Microstructure-Sensitive Design and Advanced Characterization: An MPMD/SMD Symposium Honoring David T. Fullwood
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| Presentation Title |
Determining the deformation mechanisms during tensile and creep testing in fusion relevant |
| Author(s) |
Dave Lunt, Ben Poole, Luke Hewitt, Ed Pickering, Eralp Demir, Chris Hardie |
| On-Site Speaker (Planned) |
Dave Lunt |
| Abstract Scope |
Understanding material degradation in fusion environments predominantly relies largely on testing parameters, including mechanical loading, thermal exposure, and irradiation, independently. Materials testing for the UK Spherical Tokamak for Energy Production (STEP) includes tensile and creep loading under sequential-irradiation, and simultaneous-irradiation respectively. The irradiations were performed at the Dalton Cumbrian Facility using the recently developed simultaneous irradiation-thermomechanical testing capability. High-resolution digital image correlation (HRDIC) was used to quantify the deformation at the nanoscale, while electron backscatter diffraction enabled direct correlation of strain distribution with the underlying microstructure to determine the deformation mechanisms. Comparison of deformation behaviour across testing conditions demonstrates the importance of testing time dependent mechanisms simultaneously and informs the development of future testing programmes for qualifying fusion structural materials. Furthermore, the experimental observations are being used to develop physically based models with predictive capability for the STEP materials validation strategy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Nuclear Materials |