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Journal Articles

${it In-situ}$ observation of dislocation evolution in ferritic and austenitic stainless steels under tensile deformation by using neutron diffraction

Sato, Shigeo*; Kuroda, Asumi*; Sato, Kozue*; Kumagai, Masayoshi*; Harjo, S.; Tomota, Yo*; Saito, Yoichi*; Todoroki, Hidekazu*; Onuki, Yusuke*; Suzuki, Shigeru*

Tetsu To Hagane, 104(4), p.201 - 207, 2018/00

 Times Cited Count:3 Percentile:58.46(Metallurgy & Metallurgical Engineering)

Journal Articles

Distribution and anisotropy of dislocations in cold-drawn pearlitic steel wires analyzed using micro-beam X-ray diffraction

Sato, Shigeo*; Shobu, Takahisa; Sato, Kozue*; Ogawa, Hiromi*; Wagatsuma, Kazuaki*; Kumagai, Masayoshi*; Imafuku, Muneyuki*; Tashiro, Hitoshi*; Suzuki, Shigeru*

ISIJ International, 55(7), p.1432 - 1438, 2015/07

 Times Cited Count:5 Percentile:60.41(Metallurgy & Metallurgical Engineering)

To characterize the distribution and anisotropy of dislocations in cold-drawn pearlitic steel wires, X-ray diffraction line-profile analysis was performed using synchrotron radiation micro-beams. The plastic shear strain was generally more severe near the surface than the center of the wire, whereas the dislocation density distribution was almost constant from the center to the surface. On the other hand, the dislocation rearrangement, which evolves the dislocation cell structure, progressed closer to the surface. It was also revealed that a difference between the hardness in axial and transverse wire directions could be explained by anisotropic dislocation density. Line-profile analysis based on diffraction data at elevated temperatures was performed. Whereas the cementite recovery progressed at a constant rate, the ferrite phase recovery rate was temperature-dependent, suggesting that the ferrite phase recovery was less related to that of the cementite phase.

Oral presentation

Application of ICP-MS to analytical methods for samples from 1F site at "Okuma Analysis and Research Center"

Shimada, Kozue; Iwasaki, Maho; Kurosawa, Katsuaki; Hamada, Yosei; Yonekawa, Minoru; Sato, Soichi; Kaji, Naoya; Koyama, Tomozo; Nakayama, Shinichi

no journal, , 

Oral presentation

Deployment of sensing technologies to promote human resource development in Naraha Remote Technology Development Center of JAEA

Nishimura, Akihiko; Shibata, Takuya; Yamada, Tomonori; Suzuki, Hiroshi*; Shimada, Kozue; Sato, Yuki; Torii, Tatsuo; Koyama, Shinichi

no journal, , 

In August 2015, we ran an educational program about laser technologies in Tsuruga district of Fukui prefecture and did the other about robot technologies in Tokai of Ibaraki separately. After the establishment of the Naraha remote Technology Development Center, a more advanced educational program was arranged in September 2016. It was a 10 days internship program where we focused the sensing techniques with robotic technologies. We are fighting the problems to break through the present miserable situation of Fukushima Daiichi NPPS. Countermeasure technique against water leakage for the suppression chamber is most needed. As a means of eventually sealing down, UV activating polymerization is under testing. Remote sensing for the pedestal concrete strength is also indispensable. Laser ablation technique for ICP-MS is now under preparation. And the facility has been opened for user's R&D at a low price.

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