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Sato, Hirotaka*; Shiota, Yoshinori*; Morooka, Satoshi; Todaka, Yoshikazu*; Adachi, Nozomu*; Sadamatsu, Sunao*; Oikawa, Kenichi; Harada, Masahide; Zhang, S.*; Su, Y. H.; et al.
Journal of Applied Crystallography, 50(6), p.1601 - 1610, 2017/12
Times Cited Count：17 Percentile：79.13(Chemistry, Multidisciplinary)Su, Y. H.; Oikawa, Kenichi; Harjo, S.; Shinohara, Takenao; Kai, Tetsuya; Harada, Masahide; Hiroi, Kosuke; Zhang, S.*; Parker, J. D.*; Sato, Hirotaka*; et al.
Materials Science & Engineering A, 675, p.19 - 31, 2016/10
Times Cited Count：23 Percentile：72.59(Nanoscience & Nanotechnology)Su, Y. H.; Oikawa, Kenichi; Kawasaki, Takuro; Kai, Tetsuya; Shiota, Yoshinori*; Sato, Hirotaka*; Shinohara, Takenao; Tomota, Yo*; Harada, Masahide; Kiyanagi, Ryoji; et al.
JPS Conference Proceedings (Internet), 8, p.031015_1 - 031015_5, 2015/09
In this study, neutron imaging experiment was performed using NOBORU, BL10 of MLF at J-PARC. Four kinds of cast duplex stainless steel with ferrite and austenite microstructure were studied here, which were produced by different casting method at different temperature. Firstly, two-dimensional scintillation detector using wavelength-shifting fibers with pixel size of 0.52 mm 
0.52 mm and illuminated area 55 mm 55 mm was used for data collection. Then, measurement by Micro Pixel Chamber based neutron imaging detector having higher spatial resolution about 0.2 mm was conducted. Data analysis code RITS (Rietveld Imaging of Transmission Spectra) will be used for microstructure including crystalline phase, lattice strain, crystallite size, texture evaluation.
CHarjo, S.; Shiota, Yoshinori*; Yonemura, Masao*; Tomota, Yo*; Kamiyama, Takashi*; Umemoto, Minoru*
no journal, ,
Iron Carbide FeC (called "cementite") is an important phase for engineering steels. The amount and shape of cementite determine mechanical and thermal properties of the steels. Cementite is also suggested as the major phase in the inner core of the centre of the earth. However, since the cementite single-phase specimen was so difficult to prepare, its physical properties have not been examined well. Recently, the preparation of cementite bulky specimen has been performed by using plasma-sintering with mechanical milling. The lattice parameters of the prepared bulky pure cementite and Mn-alloyed cementite were measured at VEGA-KENS (Time-of-Flight neutron powder diffractometer) in a temperature range from room temperature to 673 K, to determine their thermal expansion coefficients. Results of the measurements will be presented.
Machiya, Shutaro; Osamura, Kozo*; Suzuki, Hiroshi; Shiota, Yoshinori*; Ayai, Naoki*; Hayashi, Kazuhiko*; Sato, Kenichi*
no journal, ,
In situ strain measurement was made for inner Bi2223 filaments and outer Ag alloy in the Ag-sheathed Bi2223 tapes using neutron diffraction. The residual strain and the strain response under the axial tensile loading were measured in the Ag-sheathed Bi2223 tapes stacked with 10 sheets.
Suzuki, Hiroshi; Holden, T. M.*; Clausen, B.*; Shiota, Yoshinori*; Tomota, Yo*
no journal, ,
In this study, the textures in cold rolled 316 type austenitic stainless plate with 25 % and 75 % reduction as well as the as-received plate were measured using neutron diffraction. The texture was progressed with increase of reduction rate and the typical texture in cold rolling was observed. In addition, the intergranular strains of each reflection at 25 % reduction were also measured. The largest variations of intergranular strain were observed in 200 reflection. Relation of intergranular strains among 111, 200 and 220 reflections is very similar with that with uniaxial deformation reported in previous studies.
Shiota, Yoshinori; Akita, Koichi; Suzuki, Hiroyuki*; Kitazawa, Hideaki*; Yokokawa, Tadaharu*; Koizumi, Yutaka*; Harada, Hiroshi*
no journal, ,
no abstracts in English
Shiota, Yoshinori; Tomota, Yo*; Harjo, S.; Kamiyama, Takashi*
no journal, ,
In our previous report on in site neutron diffraction during tensile loading for heavily drawn ferrite and pearlite steels, two points were made clear. One is stress partitioning between the ferrite matrix and the cemente phases for the patented pearlite steel. Another one is the nonlinear elastic deformation above the external stress of 3GPa in the heavily drawn pearlite steel. However, these measurements were performed by the angler dipersion mehteod for {110} planes along the tensile direction, the effect of texture has not been considered. Hence, diffraction from {hkl} planes both in the tensile and transverse directions were observed in this study. Beacuse strong {hkl}
110
fiber formed during severe deformation, the strain behavior was similar to that deformation of {hkl}110 single crystal. As the axis of principal stress is 110 lattice direction, transverse {hkl} deformation in cubic system possessed elastic anisotropy.
Xu, P. G.; Suzuki, Hiroshi; Metoki, Naoto; Shiota, Yoshinori; Suzuki, Tetsuya*; Yin, F. X.*; Akita, Koichi
no journal, ,
It is well known that the neutron diffraction is suitable to evaluate the crystallographic textures of various bulk materials while the measured texture results are partially dependent on the diffractometer used. Since JAEA has several neutron diffractometers for texture measurement, including RESA, RESA-II and MUSASI (JAEA), the quantitative comparison among bulk textures of several selected samples is helpful to further optimize the measurement conditions and ensure the users to get reliable results. By proper selection of neutron beam size and collimator size, the evaluation reliability of MUSASI was improved so that it may be utilized to reliably measure neutron textures of various materials.
Suzuki, Hiroshi; Moriai, Atsushi; Shimojo, Yutaka; Xu, P. G.; Shiota, Yoshinori; Akita, Koichi
no journal, ,
Diffractometer for residual stress analysis, called RESA, has been installed at JRR-3 (Japan Research Reactor No.3) guide hall in JAEA (Japan Atomic Energy Agency) since 1993 and the fundamental studies on the materials engineering have been performed using RESA. Recently, not only academic users but also industrial users are interested in using the neutron stress measurement for ensuring the reliability of mechanical components and the number of such users is rapidly increasing each year. To respond to the increase of users of RESA, RESA has been upgraded to improve efficiency and versatility, and RESA-2 has been installed at T2-3-2 beam port in JRR-3 guide hall as well. Current status of RESA-1 and RESA-2 will be introduced in the presentation.
Shiota, Yoshinori
no journal, ,
no abstracts in English
Suzuki, Hiroshi; Moriai, Atsushi; Shimojo, Yutaka; Xu, P. G.; Shiota, Yoshinori; Akita, Koichi
no journal, ,
no abstracts in English
Shiota, Yoshinori; Akita, Koichi; Suzuki, Hiroyuki*
no journal, ,
no abstracts in English
Shiota, Yoshinori; Akita, Koichi
no journal, ,
Su, Y. H.; Oikawa, Kenichi; Kai, Tetsuya; Shinohara, Takenao; Harada, Masahide; Arai, Masatoshi; Shiota, Yoshinori*; Kiyanagi, Yoshiaki*; Sato, Hirotaka*; Tomota, Yo*
no journal, ,
Su, Y. H.; Oikawa, Kenichi; Harada, Masahide; Shinohara, Takenao; Kai, Tetsuya; Zhang, S.*; Parker, J. D.*; Sato, Hirotaka*; Shiota, Yoshinori*; Tomota, Yo*
no journal, ,
no abstracts in English
