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Journal Articles

In-house texture measurement using a compact neutron source

Xu, P. G.; Ikeda, Yoshimasa*; Hakoyama, Tomoyuki*; Takamura, Masato*; Otake, Yoshie*; Suzuki, Hiroshi

Journal of Applied Crystallography, 53(2), p.444 - 454, 2020/04

 Times Cited Count:0 Percentile:100(Chemistry, Multidisciplinary)

Journal Articles

Microstructural features and ductile-brittle transition behavior in hot-rolled lean duplex stainless steels

Takahashi, Osamu*; Shibui, Yohei*; Xu, P. G.; Harjo, S.; Suzuki, Tetsuya*; Tomota, Yo*

Quantum Beam Science (Internet), 4(1), p.16_1 - 16_15, 2020/03

Journal Articles

Comparison of the measurements of austenite volume fraction by various methods for Mn-Si-C steel

Tomota, Yo*; Sekido, Nobuaki*; Xu, P. G.; Kawasaki, Takuro; Harjo, S.; Tanaka, Masahiko*; Shinohara, Takenao; Su, Y.; Taniyama, Akira*

Tetsu To Hagane, 103(10), p.570 - 578, 2017/10

 Times Cited Count:6 Percentile:47.23(Metallurgy & Metallurgical Engineering)

Journal Articles

Prospect for application of compact accelerator-based neutron source to neutron engineering diffraction

Ikeda, Yoshimasa*; Taketani, Atsushi*; Takamura, Masato*; Sunaga, Hideyuki*; Kumagai, Masayoshi*; Oba, Yojiro*; Otake, Yoshie*; Suzuki, Hiroshi

Nuclear Instruments and Methods in Physics Research A, 833, p.61 - 67, 2016/10

 Times Cited Count:22 Percentile:2.64(Instruments & Instrumentation)

A compact accelerator-based neutron source has been lately discussed on engineering applications such as transmission imaging and small angle scattering as well as reflectometry. However, nobody considers using it for neutron diffraction experiment because of its low neutron flux. In this study, therefore, the neutron diffraction experiments are carried out using Riken Accelerator-driven Compact Neutron Source (RANS), to clarify the capability of the compact neutron source for neutron engineering diffraction. The diffraction pattern from a ferritic steel was successfully measured by suitable arrangement of the optical system to reduce the background noise, and it was confirmed that the recognizable diffraction pattern can be measured by the large sampling volume with 10 mm in cubic for an acceptable measurement time, i.e. 10 minutes. The minimum resolution of the 110 reflection for RANS is approximately 2.5 % at 8 $$mu$$s of the proton pulse width, which is insufficient to perform the strain measurement by neutron diffraction. The moderation time width at the wavelength corresponding to the 110 reflection is estimated to be approximately 30 $$mu$$s, which is the most dominant factor to determine the resolution. Therefore, refinements of the moderator system to decrease the moderation time are important to improve the resolution of the diffraction experiment using the compact neutron source. In contrast, the texture evolution due to plastic deformation was successfully observed by measuring a change in the diffraction peak intensity by RANS. Furthermore, the volume fraction of the austenite phase was also successfully evaluated by fitting the diffraction pattern using a Rietveld code. Consequently, RANS was proved to be capable for neutron engineering diffraction aiming for the easy access measurement of the texture and the amount of retained austenite.

Journal Articles

Texture evaluation in ductile fracture process by neutron diffraction measurement

Sunaga, Hideyuki*; Takamura, Masato*; Ikeda, Yoshimasa*; Otake, Yoshie*; Hama, Takayuki*; Kumagai, Masayoshi*; Suzuki, Hiroshi; Suzuki, Shinsuke*

Journal of Physics; Conference Series, 734(Part B), p.032027_1 - 032027_4, 2016/09

 Times Cited Count:0 Percentile:100

A neutron diffraction measurement was performed to reveal microstructural aspects of the ductile fracture in ferritic steel. The diffraction patterns were continuously measured at the center of the reduced area while a tensile specimen was loaded under tension until the end of the fracture process. The measurement results showed that the volume fraction of (110)-oriented grains increased when the texture evolved as a result of plastic deformation. But the mechanism of texture evolution may be changed during necking, decreasing an increase rate of the volume fraction.

Journal Articles

Non-destructive texture measurement of steel sheets with compact neutron source "RANS"

Takamura, Masato*; Ikeda, Yoshimasa*; Sunaga, Hideyuki*; Taketani, Atsushi*; Otake, Yoshie*; Suzuki, Hiroshi; Kumagai, Masayoshi*; Hama, Takayuki*; Oba, Yojiro*

Journal of Physics; Conference Series, 734(Part B), p.032047_1 - 032047_4, 2016/08

 Times Cited Count:2 Percentile:23.92

Neutron diffraction is well known to be a useful technique for measuring a bulk texture of metallic materials taking advantage of a large penetration depth of the neutron beam. However, this technique has not been widely utilized for the texture measurement because large facilities like a reactor or a large accelerator are required in general. In contrast, RANS (Riken Accelerator-driven Compact Neutron Source) has been developed as a neutron source which can be used easily in laboratories. In this study, texture evolution in steel sheets with plastic deformation was successfully measured using RANS. The results show the capability of the compact neutron source for the analysis of the crystal structure of metallic materials, which leads us to a better understanding of plastic deformation behavior.

Journal Articles

Orientation relationship between $$alpha$$-phase and high-pressure $$omega$$-phase of pure group IV transition metals

Adachi, Nozomu*; Todaka, Yoshikazu*; Suzuki, Hiroshi; Umemoto, Minoru*

Scripta Materialia, 98, p.1 - 4, 2015/03

 Times Cited Count:9 Percentile:42.53(Nanoscience & Nanotechnology)

The deformation texture of the high-pressure $$omega$$-phase of pure group IV metals was investigated using neutron diffraction analysis. The $$<$$0001$$>$$$$omega$$ direction gradually aligned to the shear direction with an increase in the shear strain introduced by the high-pressure torsion process. The deformation texture suggested that the main slip system of the $$omega$$-phase was {11-20}$$<$$0001$$>$$$$omega$$. We experimentally observed the orientation relationships of the mechanically stabilized $$omega$$-phase with respect to the reverse-transformed $$alpha$$-phase, and determined that the relationship was similar to that proposed by Silcock and Rabinkin.

Journal Articles

Measurement of residual stress in structural components by neutron diffraction

Hayashi, Makoto*; Okido, Shinobu*; Morii, Yukio; Minakawa, Nobuaki

Materials Science Research International, Special Technical Publication, 1, p.418 - 423, 2001/05

no abstracts in English

Journal Articles

Development of measurement technique for lattice spacing at stress free by neutron diffraction method

Minakawa, Nobuaki; Saito, Toru; Morii, Yukio; Sasaki, Toshihiko*; Hirose, Yukio*

Nippon Zairyo Gakkai Dai-36-Kai X Sen Zairyo Kyodo Ni Kansuru Shimpojiumu Koen Rombunshu, p.253 - 258, 2000/09

no abstracts in English

Journal Articles

Evaluation of internal stress using texture

Minakawa, Nobuaki; Morii, Yukio; Saito, Toru*

Proceedings of 6th International Conference on Residual Stressess (ICRS-6), Vol.2, p.1112 - 1115, 2000/07

no abstracts in English

Journal Articles

Diffractometer for residual stress analysis

Morii, Yukio; Minakawa, Nobuaki

Kessho Kaiseki Handobukku, p.472 - 476, 1999/09

no abstracts in English

JAEA Reports

Oral presentation

High orientation resolution texture and residual stress measurement of multilayered steel using neutron diffraction

Xu, P. G.; Inoue, Junya*; Gong, W.*; Harjo, S.; Suzuki, Hiroshi; Akita, Koichi

no journal, , 

Oral presentation

${it In situ}$ hydrogen embrittlement observation of textured high strength steel using neutron diffraction

Xu, P. G.; Ishijima, Yasuhiro; Qiu, H.*; Morooka, Satoshi; Harjo, S.

no journal, , 

no abstracts in English

Oral presentation

Neutron diffraction bulk texture measurement using compact neutron source

Xu, P. G.; Kakuta, Ryunosuke*; Takamura, Masato*; Otake, Yoshie*; Suzuki, Hiroshi

no journal, , 

Oral presentation

Effect of hydrogen charging on anisotropic tensile deformation behavior of high strength steel plate

Xu, P. G.; Ishijima, Yasuhiro; Qiu, H.*; Morooka, Satoshi; Gong, W.*; Harjo, S.

no journal, , 

Oral presentation

Cooperation of texture measurement study of steel materials between large-scale neutron facilities and RIKEN compact neutron source

Xu, P. G.; Takamura, Masato*; Ikeda, Yoshimasa*; Kakuta, Ryunosuke*; Takahashi, Susumu*; Hakoyama, Tomoyuki*; Iwamoto, Chihiro*; Otake, Yoshie*; Suzuki, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Neutron diffraction with RANS for industrial "on-site" applications

Takamura, Masato*; Iwamoto, Chihiro*; Xu, P. G.; Kakuta, Ryunosuke*; Kurihara, Ryo*; Hakoyama, Tomoyuki*; Ikeda, Yoshimasa*; Suzuki, Hiroshi; Otake, Yoshie*

no journal, , 

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