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Journal Articles

Materials evaluation using the Japan Proton Accelerator Research Complex (J-PARC)

Morooka, Satoshi

Hozengaku, 19(1), p.29 - 34, 2020/04

no abstracts in English

Journal Articles

Electrochemical adsorption on Pt nanoparticles in alkaline solution observed using in situ high energy resolution X-ray absorption spectroscopy

Kusano, Shogo*; Matsumura, Daiju; Ishii, Kenji*; Tanaka, Hirohisa*; Mizuki, Junichiro*

Nanomaterials (Internet), 9(4), p.642_1 - 642_14, 2019/04

 Times Cited Count:0 Percentile:100(Nanoscience & Nanotechnology)

Journal Articles

Martensite phase stress and the strengthening mechanism in TRIP steel by neutron diffraction

Harjo, S.; Tsuchida, Noriyuki*; Abe, Jun*; Gong, W.*

Scientific Reports (Internet), 7(1), p.15149_1 - 15149_11, 2017/11

AA2017-0453.pdf:3.62MB

 Times Cited Count:25 Percentile:16.29(Multidisciplinary Sciences)

Journal Articles

Room-temperature creep tests under constant load on a TRIP-aided multi-microstructure steel

Tsuchida, Noriyuki*; Nagahisa, N.*; Harjo, S.

Materials Science & Engineering A, 700, p.631 - 636, 2017/07

 Times Cited Count:1 Percentile:86.31(Nanoscience & Nanotechnology)

Journal Articles

Reverse austenite transformation behavior in a tempered martensite low-alloy steel studied using ${it in situ}$ neutron diffraction

Tomota, Yo*; Gong, W.*; Harjo, S.; Shinozaki, Tomoya*

Scripta Materialia, 133, p.79 - 82, 2017/05

AA2017-0349.pdf:2.43MB

 Times Cited Count:13 Percentile:25.04(Nanoscience & Nanotechnology)

Journal Articles

Quantitative analysis of tempering microstructure via ${it in-situ}$ synchrotron X-ray diffraction during heating

Morooka, Satoshi; Kanata, Hiroyuki*; Oba, Yojiro*; Sato, Masugu*

Heisei-28-Nendo SPring-8 Sangyo Shinbunya Shien Kadai, Ippan Kadai (Sangyo Bunya) Jisshi Hokokusho, p.95 - 98, 2017/00

no abstracts in English

Journal Articles

In-situ measurement of transitional stress in welds metal of steel using synchrotron radiation

Tsuji, Akihiro*; Zhang, S.*; Hashimoto, Tadafumi*; Okano, Shigetaka*; Shobu, Takahisa; Mochizuki, Masahito*

Zairyo, 65(9), p.665 - 671, 2016/09

It is necessary to control weld residual stress which has negative influence on fracture strengths. In structural steel welds, complex residual stress fields are formed due to phase transformation that occur according to the thermal cycles. In this study, in-situ evaluation of phase transformation and transitional stress simultaneously during welding is discussed. In the test using SM490A, after cooling process, stress evaluated by this system showed good agreement with that evaluated by lab X-ray. During austenite to ferrite transformation in weld metal, tensile stress occurred in austenite and compressive stress occurred in ferrite. Moreover, stress concentration was occurred in ferrite phase immediately after the start of phase transformation. Also, stress concentration was occurred in austenite phase just before the end of phase transformation.

Journal Articles

CO adsorption and decomposition on Pd/Al$$_{2}$$O$$_{3}$$ studied by time-resolved XAFS using dispersive optics

Matsumura, Daiju; Okajima, Yuka*; Nishihata, Yasuo

Journal of Physics; Conference Series, 712(1), p.012042_1 - 012042_4, 2016/06

 Times Cited Count:0 Percentile:100

Journal Articles

Domain boundaries in the GaAs(001)-2$$times$$4 surface

Takahashi, Masamitsu; Yoneda, Yasuhiro; Yamamoto, Naomasa*; Mizuki, Junichiro

Physical Review B, 68(8), p.085321_1 - 085321_5, 2003/08

 Times Cited Count:17 Percentile:35.23(Materials Science, Multidisciplinary)

The $$alpha$$, $$beta$$ and $$gamma$$ phases of the GaAs(001)-2$$times$$4 surface have been investigated by ${it in situ}$ surface X-ray diffraction in an As flux and at temperatures ranging from 480$$^circ$$C to 610$$^circ$$C. It has been found that the fractional-order peaks originating from the fourfold symmetry show shift in the [110] direction as well as significant broadening of the peaks in the $$alpha$$ and $$gamma$$ phases. The direction of the peak shift is characteristic in each phase. This behavior is explained by the formation of the antiphase domain boundaries. The atomic structure of the domain boundaries is discussed.

Journal Articles

Observation of optical signals using optical fibers in operating fission reactor core

Kakuta, Tsunemi; Shikama, Tatsuo*; *; ; Shamoto, Naoki*; *

Proc. of Int. Conf. on Optical Technology and Image Processing in Fluid,Thermal and Combustion Flow, p.1 - 5, 1998/00

no abstracts in English

Journal Articles

IEA Workshop on In-Situ Measurements of Electrical Properties of Irradiated Ceramics

Ono, Hideo

Nippon Genshiryoku Gakkai-Shi, 32(11), p.1099 - 1100, 1990/11

no abstracts in English

Oral presentation

Internal strain distribution in lap joint materials under high temperature and tensile stress using synchrotron radiation

Shobu, Takahisa; Shiro, Ayumi; Muramatsu, Toshiharu; Yamada, Tomonori; Naganuma, Masayuki; Ozawa, Takayuki

no journal, , 

no abstracts in English

Oral presentation

In-situ measurement of strain distribution in lap joint materials under high temperature and tensile stress using synchrotron radiation

Shobu, Takahisa; Shiro, Ayumi; Muramatsu, Toshiharu; Yamada, Tomonori; Naganuma, Masayuki; Ozawa, Takayuki

no journal, , 

no abstracts in English

Oral presentation

Evaluation of material strength under high temperature using synchrotron radiation

Shobu, Takahisa

no journal, , 

no abstracts in English

Oral presentation

In-situ measurement of internal strain distribution in laser welding materials under high temperature and tensile stress using synchrotron radiation

Shobu, Takahisa; Shiro, Ayumi; Muramatsu, Toshiharu; Yamada, Tomonori; Naganuma, Masayuki; Ozawa, Takayuki

no journal, , 

By using synchrotron radiation X-rays, we performed in-situ measurement of internal strain distribution in lap joint materials with laser under high temperature and tensile stress. Local strong tensile or compressive strain were observed near the boundary of welding. The results are almost consistent with the results of finite element analysis. On the other hand, some specimens were also obtained results which do not match the finite element analysis. This reason is considered to be due to internal defects.

Oral presentation

First trial of in situ neutron diffraction experiment with thermo-mechanical simulator at J-PARC

Harjo, S.; Shibata, Akinobu*; Park, N.*; Kawasaki, Takuro; Oishi, Kiichiro*; Aizawa, Kazuya; Tsuji, Nobuhiro*

no journal, , 

Oral presentation

First trial of in situ neutron diffraction experiment with thermo-mechanical simulator at J-PARC

Harjo, S.; Kawasaki, Takuro; Aizawa, Kazuya; Shibata, Akinobu*; Tsuji, Nobuhiro*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of specific plastic deformation behavior for LPSO-type magnesium alloy by in-situ neutron diffraction

Morooka, Satoshi; Gong, W.; Harjo, S.; Aizawa, Kazuya

no journal, , 

Recently, magnesium alloys containing a Mg-Zn-Y long-period stacking ordered (LPSO) phase structure have been reported to exhibit excellent mechanical properties, including high strength and reasonable ductility. It is very important to determine the differences in plastic deformation behaviors, mechanical properties by existing of LPSO phase structure and their origin of deformation mechanism induced by the crystal structures. In this study, the reversible cyclic hardening behavior of LPSO-type magnesium alloys is investigated using ${it in-situ}$ TOF neutron diffraction during dynamic tension-compression cyclic loading conditions at constant $$pm$$0.5 % strain amplitude. The peak stresses in both tension and compression were observed to increase gradually up to the 200th cycle. At the 200th tension-compression cycle, tension and compression peak stresses are approximately +97.4 and -176.7 MPa, respectively. The peak stress for the compression was observed to be larger than that for the tension, suggesting that kinking accompanying with hardening was occurred by compression deformation. The evidence of reversible deformation behavior was obtained from the change in individual (${it hk-il}$) integrated intensity during real-time tension-compression cyclic testing.

Oral presentation

Oral presentation

Evolution of internal stresses during cyclic deformation in LPSO type of magnesium alloy monitored by in-situ neutron diffraction

Morooka, Satoshi; Gong, W.*; Aizawa, Kazuya; Kawasaki, Takuro; Harjo, S.

no journal, , 

25 (Records 1-20 displayed on this page)