|
|
Iwate University Repository >
030 工学 Technology >
学術雑誌掲載論文 >
査読済み論文(article) >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10140/2055
|
| Title: | In situ magnetic measurements under neutron radiation in Fe metal and low carbon steel |
| Authors: | Takahashi, Seiki
Kikuchi, Hiroaki
Ara, Isato
Ebine, Noriya
Kamada, Yasuhiro
Kobayashi, Satoru
Suzuki, Masahide
Nondestructive Evaluation and Science Research Center, Faculty of Engineering, Iwate University
Nondestructive Evaluation and Science Research Center, Faculty of Engineering, Iwate University,
Nondestructive Evaluation and Science Research Center, Faculty of Engineering, Iwate University,
Department of Reactor Safety Research, Japan Atomic Energy Agency
Nondestructive Evaluation and Science Research Center, Faculty of Engineering, Iwate University
Nondestructive Evaluation and Science Research Center, Faculty of Engineering, Iwate University,
Department of Reactor Safety Research, Japan Atomic Energy Agency |
| Issue Date: | 2006 |
| Publisher: | American Institute of Physics |
| Citation: | Journal of Applied Physics,Vol.100,i2,p023902-1-6 |
| Abstract: | Magnetic minor hysteresis loops of low carbon steel and Fe metal have been measured during neutron radiation at 563 K in a 50 MW nuclear reactor. For investigation of nucleation mechanism of copper precipitates and dislocation loops during neutron radiation, special attention was paid to minor-loop coefficients, which are deduced from simple relations between minor-loop parameters and are very sensitive to lattice defects such as dislocations, copper precipitates, and grain boundaries. We found that with increasing neutron fluence, the minor-loop coefficients of low carbon steel sharply increase and show a maximum at the fluence of 1×1019 cm–2, followed by a slow decrease. The appearance of the maximum suggests the presence of two mechanisms of internal stress; while copper precipitates and dislocation loops in the matrix make the internal stress increase, those grown in the vicinity of dislocations compensate the internal stress of dislocations so as to minimize the elastic energy. On the other hand, the minor-loop coefficients show a monotonic increase with neutron fluence in Fe metal where dislocation loops play an important role for the brittleness. |
| URI: | http://hdl.handle.net/10140/2055 |
| ISSN: | 0021-8979 |
| Appears in Collections: | 査読済み論文(article)
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|
