@article{oai:repo.qst.go.jp:00077926,
 author = {Kumada, Takayuki and Oba, Yojiro and Motokawa, Ryuhei and Morooka, Satoshi and Tominaga, Aki and Tanida, Hajime and Shobu, Takahisa and Konno, Azusa and Owada, Kenji and Oono, Naoko and Ukai, Shigeharu and Kenji, Ohwada},
 journal = {Journal of Nuclear Materials},
 month = {Nov},
 note = {We have succeeded in observing Fe-ion-beam induced nanostructural change of MA956 oxide dispersion-strengthened (ODS) steel using anomalous small-angle X-ray scattering (ASAXS) diffractometry. The ASAXS curve shows a power-law scattering that follows the Porod's law and an overlapped shoulder peak at the magnitude of scattering vector, Q, around 0.6nm−1. As the X-ray energy approaches the absorption K-edge of Cr (5.990keV), the intensity of the power-law scattering slightly decreases, but that of the shoulder peak remarkably increases. From these results, the power-law scattering is attributed to Cr-poor scatterers with a radius much larger than 5nm, and the shoulder peak is attributed to Cr-rich α′ precipitates with a mean radius of 2.8nm. After the ion-beam irradiation, intensity of the power-law scattering is nearly doubled, but the shoulder peak remains unchanged within an error of 2%. The latter result indicates that the irradiation-induced changes of radius and inter-precipitation distance of the α′ precipitates are smaller than 10%, and the change of their interface thickness is less than 0.5nm. In this way, our ASAXS results guarantee an absence of irradiation-induced nanostructure change of specific kinds of precipitates together with statistical errors, while observing changes of other precipitates.},
 title = {Anomalous small-angle X-ray scattering (ASAXS) study of irradiation-induced nanostructure change in Fe-ion beam irradiated oxide dispersion-strengthened (ODS) steel},
 volume = {528},
 year = {2019}
}