Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1566395 | Journal of Nuclear Materials | 2012 | 5 Pages |
Abstract
We report results of measurements of magnetic minor hysteresis loops for neutron-irradiated A533B nuclear reactor pressure vessel steels varying alloy composition and irradiation condition. A minor-loop coefficient, which is obtained from a scaling power law between minor-loop parameters exhibits a steep decrease just after irradiation, followed by a maximum in the intermediate fluence regime for most alloys. A model analysis assuming Avrami-type growth for Cu-rich precipitates and an empirical logarithmic law for relaxation of residual stress demonstrates that an increment of the coefficient due to Cu-rich precipitates increases with Cu and Ni contents and is in proportion to a yield stress change, which is related to irradiation hardening.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
S. Kobayashi, T. Yamamoto, D. Klingensmith, G.R. Odette, H. Kikuchi, Y. Kamada,