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Ioka, Ikuo; Kiuchi, Kiyoshi*; Takizawa, Masayuki*; Ito, Takeshi*
Nihon Kinzoku Gakkai-Shi, 78(1), p.16 - 22, 2014/01
Times Cited Count：0 Percentile：0.01(Metallurgy & Metallurgical Engineering)A multi-axis stress field is indispensable to quick and quantitative evaluation of stress corrosion cracking for constructional materials and weld joints of existing industrial plants. The applicability of multi-axis residual stress field into SCC tests was evaluated. The hard sphere ball was stuffed into small flat-plate of type 304SS. Numerical analysis was conducted in order to compare with the experimental results. The numerical analysis was comparatively in agreement with the experimental results. Parameters of the test were selected by numerical analysis to optimize the residual stress of specimen. SCC test in MgCl
was performed using the specimen with optical residual stress condition. It is confirmed that the multi-axis residual stress field was useful in quick and quantitative SCC test by comparing the initiation of cracks with the distribution of residual stress obtained by numerical analysis.
Cr
N and Si-doping effects studied by photoemission and X-ray absorption spectroscopySong, G.*; Kobayashi, Masaki*; Hwang, J. I.*; Kataoka, Takashi*; Takizawa, Masaru*; Fujimori, Atsushi; Okochi, Takuo; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; et al.
Physical Review B, 78(3), p.033304_1 - 033304_4, 2008/07
Times Cited Count：8 Percentile：37.3(Materials Science, Multidisciplinary)Yabuta, Naohiro*; Takizawa, Masayuki*; Hikawa, Tamae*; Kawai, Jun*
JNC TN6400 2004-004, 89 Pages, 2004/03
JNC-TN6400-2004-004.pdf:2.47MB
On the closure of uranium production facilities, settled at Ningyo-Toge Environmental Engineering Center (NTEEC) and other area in Okayama and Tottori prefectures, Action Plans for risk communication with residence and local governments were developed. Firstly, to clarify requirements for risk communication plans, extensive case study for resemblance project of other fields were performed, such as chemical hazards exposure, industrial waste disposal, metal mining site closure and overseas uranium mining site closure. Secondly, with the understanding of societal environment issues around NTEEC, missions of risk communication at NTEEC case were listed. After considerations above, action plans for risk communication on the uranium mining sites remedy at NTEEC were developed. Plans involves several alternatives and were to be performed in building blocks manner. Emergency management plans during pursuing of risk communication plans were also developed.
Ioka, Ikuo; Kiuchi, Kiyoshi; Ito, Takeshi*; Takizawa, Masayuki*; Fukai, Tsuyoshi*
no journal, ,
In order to develop evaluation technology for environmentally assisted cracking, the crack susceptibility of specimens with Brinnel indentation was examined in the corrosive environment. The multiaxial stress field was formed around the indentation. The residual stress around the indentation was analyzed by three dimensional FEM. Moreover, the residual stress was measured by the X-ray diffractometer. After the corrosion test, some cracks that expanded in the direction of the diameter were observed at the tensile residual stress area. The prospect of evaluation technology for environmentally assisted cracking under the multiaxial stress field was obtained from the results.
