About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Neutron and X-ray Scattering in Materials Science
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Presentation Title |
Abnormal Grain Growth and Nano-oxide Precipitation of Oxide Dispersion Strengthened Steels Throughout Their Consolidation Evaluated by In-situ Wide and Small Angle X-ray Scattering |
Author(s) |
Gabriel Spartacus, Joël Malaplate, Frédéric de Geuser, Denis Sornin , Raphaëlle Guillou , Alexis Deschamps |
On-Site Speaker (Planned) |
Gabriel Spartacus |
Abstract Scope |
Oxide Dispersion Strengthened (ODS) steels are candidate materials for nuclear fusion and fission power plants. The production process of ODS steels includes ball milling of Fe-Cr, Y2O3 and TiH2 to dissolve Y, Ti and O into the matrix. This process also induces a very fine and deformed grain microstructure. During subsequent annealing at 1100°C, Y-Ti-O nano-oxides form, grain grows and dislocation density evolves, all in intricate ways that are so far poorly understood, mostly due to lack of experimental data. To investigate these features, both the nano-oxides precipitation and mean crystallite size and dislocation density were investigated by in-situ small and wide angle X-ray scattering respectively, monitoring the pinning of grains and dislocations by the growing nano-oxides, already effective at 500°C. The temperature of abnormal grain growth were determined on several ODS grades between 600-800°C, and different trends were identified on several ODS with different Y/Ti/O ratios addition. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Characterization, Iron and Steel |