About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Nanostructured Materials in Extreme Environments
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Presentation Title |
G-22: Development of Nanostructured Ferritic Superalloys for Nuclear Environments |
Author(s) |
Sophia Von Tiedemann, Kan Ma, Pedro Ferreirós, Alexander Knowles |
On-Site Speaker (Planned) |
Sophia Von Tiedemann |
Abstract Scope |
Nuclear fusion and generation-IV fission reactors will operate at increasingly extreme conditions regarding temperature and neutron flux. However, existing structural steels and zirconium alloys become limited in strength and creep resistance above ~500°C. Therefore, the development of new materials with high microstructural stability and strength at elevated temperatures, as well as resistance to irradiation damage, plays a key role in next-generation nuclear power. Ferritic (BCC) superalloys, based on a disordered A2/ferritic matrix strengthened by ordered-BCC B2/L21 nanoprecipitates, are being developed to meet these challenges. Fe-Al-X type systems have been studied following ageing heat treatments and proton irradiation. The effect of changes in precipitate volume fraction (precipitate-matrix interfacial area) and lattice misfit, on nano-hardness, irradiation-induced defect formation and sink strength were investigated. Characterisation was carried out using Scanning and Transmission Electron Microscopy (SEM, TEM, STEM), Atom Probe Tomography (APT) and nano-indentation pre- and post-proton irradiation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Characterization, Iron and Steel |