High dose self-ion irradiation studies on 14YWT nanostructured ferritic alloys

Aydoğan Güngör, Eda
Anderoglu, Osman
Almirall, Nathan
Odette, Robert
Shao, Lin
Garner, Frank
Nanostructured ferritic alloys (NFAs) are attractive materials for core components in Generation IV reactors because of their excellent high temperature strength, stability, and radiation damage resistance, thanks to the existence of the nanooxides (NOs) having the size <5 nm. In this research, 14YWT NFAs, produced in thin-walled tubular form, were irradiated with 3.5 MeV Fe2+ ions up to 1100 peak dpa at 450 °C. Their initial and post irradiation microstructures were investigated using transmission electron microscopy (TEM), atom probe tomography (APT) and micro- and nanohardness techniques. It has been found that these alloys show almost zero swelling. Besides, both TEM and APT techniques indicate that the NOs are quite stable under irradiation at 450 °C.


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Effect of High-Density Nanoparticles on Recrystallization and Texture Evolution in Ferritic Alloys
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Ferritic alloys are important for nuclear reactor applications due to their microstructural stability, corrosion resistance, and favorable mechanical properties. Nanostructured ferritic alloys having a high density of Y-Ti-O rich nano-oxides (NOs < 5 nm) are found to be extremely stable at high temperatures up to similar to 1100 degrees C. This study serves to understand the effect of a high density of nano-particles on texture evolution and recrystallization mechanisms in ferritic alloys of 14YWT (14Cr-3W-...
Citation Formats
E. Aydoğan Güngör, O. Anderoglu, N. Almirall, R. Odette, L. Shao, and F. Garner, “High dose self-ion irradiation studies on 14YWT nanostructured ferritic alloys,” presented at the 24th International Conference on the Application of Accelerators in Research and Industry (CAARI 2016) (30 Ekim - 04 Kasım 2016), 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/84489.