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Journal Articles

Characterization of deformation by cold rolling in ferritic steel containing Cu particles using neutron transmission analysis

Oba, Yojiro; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*

ISIJ International, 62(1), p.173 - 178, 2022/01

 Times Cited Count:1 Percentile:34.75(Metallurgy & Metallurgical Engineering)

Journal Articles

Energy-resolved small-angle neutron scattering from steel

Oba, Yojiro*; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Takata, Shinichi; Sato, Nobuhiro*; Inoue, Rintaro*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*; Sugiyama, Masaaki*

Journal of Applied Crystallography, 50(2), p.334 - 339, 2017/04

 Times Cited Count:3 Percentile:29.42(Chemistry, Multidisciplinary)

Journal Articles

Characterization of microstructure using Bragg edge and energy-resolved small-angle neutron scattering

Oba, Yojiro; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*

Proceedings of 5th International Symposium on Steel Science (ISSS 2017), p.151 - 154, 2017/00

Small-angle neutron scattering and neutron diffraction are powerful tools to characterize microstructures in steels. Several new experimental techniques such as Bragg edge transmission analysis and energy-resolved small-angle neuron scattering have been recently developed with the opening of new-generation pulsed neutron sources. In this talk, the combined use of these diffraction and small-angle scattering techniques are discussed for the total characterization of the microstructures in steels.

Journal Articles

Magnetic scattering in the simultaneous measurement of small-angle neutron scattering and Bragg edge transmission from steel

Oba, Yojiro*; Morooka, Satoshi; Oishi, Kazuki*; Sato, Nobuhiro*; Inoue, Rintaro*; Adachi, Nozomu*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*; Sugiyama, Masaaki*

Journal of Applied Crystallography, 49(5), p.1659 - 1664, 2016/10

 Times Cited Count:12 Percentile:67.1(Chemistry, Multidisciplinary)

Journal Articles

Synthesis, structural transformation, thermal stability, valence state, and magnetic and electronic properties of PbNiO$$_{3}$$ with perovskite- and LiNbO$$_{3}$$-type structures

Inaguma, Yoshiyuki*; Tanaka, Kie*; Tsuchiya, Takeshi*; Mori, Daisuke*; Katsumata, Tetsuhiro*; Oba, Tomonori*; Hiraki, Koichi*; Takahashi, Toshihiro*; Saito, Hiroyuki

Journal of the American Chemical Society, 133(42), p.16920 - 16929, 2011/09

 Times Cited Count:83 Percentile:85.64(Chemistry, Multidisciplinary)

JAEA Reports

Development of ultrasonic heat transfer tube thickness measurement apparatus (Contract research)

Oba, Toshihiro; Suetsugu, Hidehiko*; Yano, Masaya*; Kato, Chiaki; Yanagihara, Takao

JAERI-Tech 2002-082, 47 Pages, 2003/01

JAERI-Tech-2002-082.pdf:1.87MB

The demonstration test for evaluating reliability of the acid recovery evaporator at Rokkasho Reprocessing Plant has been carried out at JAERI. For the nondestructive measurement of the thickness of heat transfer tubes of the acid recovery evaporator in corrosion test, we have developed thickness measurement apparatus for heat transfer tubes by ultrasonic immersion method with high resolution. The ultrasonic prove in a heat transfer tube can be moved vertically and radially. The results obtained by this apparatus coincident well with those obtained by a destructive method using an optical microscope.

JAEA Reports

Fabrication of saturated temperature capsule for IASCC study

Ishikawa, Kazuyoshi; Kikuchi, Taiji; Isozaki, Futoshi*; Inoue, Hiromi; Oba, Toshihiro; Matsui, Yoshinori; Saito, Takashi; Nakano, Junichi; Tsuji, Hirokazu

JAERI-Tech 2002-061, 69 Pages, 2002/08

JAERI-Tech-2002-061.pdf:12.21MB

Study of irradiation assisted stress corrosion cracking (IASCC) is an important subject for the plant life assessment and extension of the light water reactors (LWRs). It is necessary that initiation mechanism of IASCC should be made clear under combined effect of irradiation, environment and stress in order to understand IASCC phenomena. Under the existing circumstance, Saturated Temperature Capsule (SATCAP) were fabricated for the irradiation test of IASCC studies in Japan Material Testing Reactor (JMTR). SATCAP is the irradiation rig to irradiate materials in high pressure water of controlled chemistry and temperature simulating Boiling water reactors (BWRs) core environment from the new water feelding system of out-of-pile. This report describes (1) investigation of technical problems for the design and fabrication of SATCAP, (2) the tests results of the problems and (3) fabrication and inspection of SATCAP.

Journal Articles

The Method for decrease of helium gas leak with O-ring rubber gasket

Oba, Toshihiro; Inoue, Hiromi*; Kikuchi, Taiji; Taka, Isamu; Chiba, Masaaki; Ishikawa, Kazuyoshi; Tsuda, Kazumi*; Takeyama, Tomonori; Isozaki, Futoshi*; Terunuma, Isao*; et al.

NIFS-MEMO-36, p.121 - 124, 2002/06

no abstracts in English

JAEA Reports

The Method for decrease of helium gas leak with double O-ring rubber gasket

Oba, Toshihiro; Kikuchi, Taiji; Taka, Isamu; Isozaki, Futoshi*; Chiba, Masaaki; Ishikawa, Kazuyoshi; Inoue, Hiromi*; Terunuma, Isao*; Sawabe, Masaki*; Tsuda, Kazumi*; et al.

JAERI-Tech 2001-067, 29 Pages, 2001/11

JAERI-Tech-2001-067.pdf:1.93MB

no abstracts in English

JAEA Reports

Manufacture of ultrasonic thickness measurement apparatus

Oba, Toshihiro; Yanagihara, Takao; Kato, Chiaki; Hamada, Shozo

JAERI-Tech 2001-059, 36 Pages, 2001/09

JAERI-Tech-2001-059.pdf:7.8MB

The demonstration test for evaluating reliability of the acid recovery evaporator at Rokkasho Reprocessing Plant has been carried out at JAERI. For the nondestructive mesurement of the thickness of heat transfer tubes in the acid recovery evaporator and short tubes used in corrosion test, we have developed ultra sonic thickness measuring apparatus using immersion method with high resolution. This apparatus can measure and record tube thickness automatically with a personal computer. The results obtained by this apparatus are coincident with the results obtained by a destructive method using an optical microscope.

JAEA Reports

Fabrication of thin cadmium cylinder coated with aluminum for neutron irradiation capsules

Takeyama, Tomonori; Chiba, Masaaki; Isozaki, Futoshi*; Amezawa, Hiroo; Itabashi, Yukio; Kikuchi, Taiji; Otabe, Yoshikiyo*; Hirata, Yuji*; Taka, Isamu; Oba, Toshihiro

JAERI-Tech 2001-024, 32 Pages, 2001/03

JAERI-Tech-2001-024.pdf:4.41MB

no abstracts in English

JAEA Reports

Reduction technique of welding defect in the welded joint of aluminum alloys base on GTAW

Maeda, Akio; Oba, Toshihiro; Kikuchi, Hiroyuki; Shibata, Katsuyuki

JAERI-Tech 2001-003, 48 Pages, 2001/02

JAERI-Tech-2001-003.pdf:5.95MB

no abstracts in English

JAEA Reports

Ductile fracture behavior of 3-inch diameter carbon steel piping with a circumferential through-wall crack under bending load

; Shibata, Katsuyuki; Onizawa, Kunio; ; Oba, Toshihiro; Miyazono, S.

JAERI-M 88-130, 120 Pages, 1988/07

JAERI-M-88-130.pdf:3.45MB

no abstracts in English

JAEA Reports

Investigation on ductile fracture behavior of 3-inch diameter type 304 stainless steel pipe with a circumferential through-wall crack

Yasuda, Yuji; Shibata, Katsuyuki; Onizawa, Kunio; ; Oba, Toshihiro; Miyazono, S.

JAERI-M 87-068, 111 Pages, 1987/05

JAERI-M-87-068.pdf:3.0MB

no abstracts in English

Oral presentation

Plastic deformation behavior of harder and/or softer dispersion second phase containing of steels

Morooka, Satoshi; Oba, Yojiro*; Tsuchiyama, Toshihiro*; Akama, Daichi*; Gilbert, E. P.*

no journal, , 

no abstracts in English

Oral presentation

Characterization of microstructure in steel using simultaneous measurement of neutron diffraction, small-angle neutron scattering, and neutron transmission

Oba, Yojiro; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*

no journal, , 

Since microstructures of steels are closely related to their mechanical properties, the characterization of the microstructures is important. Neutron scattering techniques are useful for the characterization of the steel and widely utilized. On the other hand, recent development of the neutron transmission analysis enables the characterization of the microstructure using the neutron transmission similar to the conventional neutron scattering measurements. The possibilities of advanced experiments using neutron scattering and transmission measurements are discussed for the characterization of the microstructure.

Oral presentation

Characterization of precipitates and matrix in steel using neutron transmission spectrum

Oba, Yojiro; Morooka, Satoshi; Tsuchiyama, Toshihiro*; Oishi, Kazuki*; Suzuki, Junichi*

no journal, , 

no abstracts in English

18 (Records 1-18 displayed on this page)
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