Pre- and post-deformation microstructures and tensile properties of the newly-developed oxide dispersion strengthened (ODS) ferritic steels, K1 (Fe-19Cr-0.3W-0.3Ti-0.3Y2O3) and K4 (Fe-19Cr-4Al-2W-0.3Ti-0.3Y2O3) for nuclear fusion reactors and Generation IV nuclear fission systems were investigated. The nano-oxides of the K1 were cubic pyrochlore Y2Ti2O7, while those of K4 were mainly perovskite AlYO3, which was confirmed by transmission electron microscopy and X-ray diffraction (XRD) analyses. K1 was found to have much higher strength than K4 and the difference in the nano-oxides of K1 and K4 can account for this difference. Most of the extracted residues in the K1 and K4 identified by XRD consisted of M23C6 carbides.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering