Response of 9Cr-ODS Steel to Proton Irradiation at 400 °C
The stability of Y–Ti–O nanoclusters, dislocation structure, and grain boundary segregation in 9Cr-ODS steels has been investigated following proton irradiation at 400 °C with damage levels up to 3.7 dpa. A slight coarsening and a decrease in number density of nanoclusters were observed as a result of irradiation. The composition of nanoclusters was also observed to change with a slight increase of Y and Cr concentration in the nanoclusters following irradiation. Size, density, and composition of the nanoclusters were investigated as a function of nanocluster size, specifically classified to three groups. In addition to the changes in nanoclusters, dislocation loops were observed after irradiation. Finally, radiation-induced enrichment of Cr and depletion of W were observed at grain boundaries after irradiation.
He, Jianchao; Wan, Farong; Sridharan, Kumar; Allen, Todd; Certain, A.; and Wu, Y. Q.. (2014). "Response of 9Cr-ODS Steel to Proton Irradiation at 400 °C". Journal of Nuclear Materials, 452(1), 87-94.