Role of nickel and manganese in recovery of resistivity in iron-based alloys after low-temperature proton irradiation |
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| Authors: | K Murakami T Iwai H Abe N Sekimura Y Katano T Iwata |
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| Institution: | 1. Nuclear Professional School, The University of Tokyo, 2-22 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1188, Japan;2. Faculty of Medicine, Yamagata University, 2-2-2 Iida-Nishi, Yamagata, Yamagata-shi 990-9585, Japan;3. Institute of Materials Research, Tohoku University, Katahira 2-1-1, Miyagi, Sendai 980-0812, Japan;4. Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1, Tokyo, Hongo, Bunkyo 113-8656, Japan |
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| Abstract: | This study investigates the recovery of electric resistivity in pure iron, Fe–0.6Ni and Fe–1.5Mn as related to isochronal annealing following 1 MeV proton irradiation at lower temperature than 70 K, focusing on the relationship between solute atoms and irradiation defects. Both nickel and manganese prevent stage ID recovery, which corresponds to correlated recombination. Stage II recovery is also changed by the addition of a solute, which corresponds to the migration of small interstitial clusters. In both pure iron and Fe–0.6Ni, no evident difference was observed in the stage III region, which corresponds to the migration of vacancies. In contrast, two substages appeared in the Fe–1.5Mn at a higher temperature than stage IIIB appeared in pure iron. These substages are considered to represent the release of irradiation-induced defects, which was trapped by manganese. |
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| Keywords: | radiation defects ion irradiation recovery stages reactor pressure vessel |
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