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Harjo, S.; 相澤 一也; 川崎 卓郎; Gong, W.; 岩橋 孝明; 伊藤 崇芳*; 阿部 淳*; 中谷 健
no journal, ,
The Engineering Materials Diffractometer "TAKUMI" has been built at BL19 in Materials and Life Science Experimental Facility, J-PARC and is operated to promote scientific and industrial studies in various areas such as materials science and engineering and mechanical engineering. The construction of BL19 TAKUMI was completed at the beginning of 2009, and user programs have been started almost in the same time. The operation was terminated during 2011 due to the damages caused by the Tohoku earthquake, but was restarted on 2012 after the repairing and commissioning within a year. Current status of TAKUMI will be briefly introduced; (1) instrument specifications, (2) covering applications, (3) unique sample environmental devices and available experiments, (4) research examples and (5) new challenges and upgrading plans.
Harjo, S.; 川崎 卓郎; Gong, W.; 相澤 一也
no journal, ,
The Engineering Materials Diffractometer "TAKUMI" has been built at BL19 in Materials and Life Science Experimental Facility, J-PARC and is operated to promote scientific and industrial studies in various areas such as materials science and engineering and mechanical engineering. TAKUMI was designed not only to have high resolution providing high accuracy in lattice strain, to have also high intensity enabling to time transient diffraction per seconds or less. The construction of BL19 TAKUMI was completed at the beginning of 2009. The operation was terminated during 2011 due to the damages caused by the Tohoku earthquake, but was restarted on 2012 after the repairing and commissioning within a year. Current status of TAKUMI will be briefly introduced; (1) instrument specifications, (2) covering applications, (3) unique sample environmental devices and available experiments, (4) research examples and (5) new challenges and upgrading plans.
Harjo, S.; 相澤 一也; 川崎 卓郎
no journal, ,
中性子はその大きな透過能力のため結晶材料内部の応力・ひずみ、その他微小組織情報を測定するのに 回折法でよく用いられる。機械部品等内の残留ひずみ分布測定のために典型的に用いられているが、最近J-PARCにて建設された高強度高分解能の匠を用いれば、蓄電池材料等の複合材料の様々な条件下でのその場測定が可能になってきた。
Harjo, S.; 川崎 卓郎; Gong, W.*; 山下 享介; 諸岡 聡; 原田 剛*; 相澤 一也
no journal, ,
TAKUMI is a time-of-flight neutron diffractometer dedicated for engineering materials sciences. Experiments in TAKUMI vary from internal strain mapping in engineering components, microstructural evolutions during deformations of structural or functional materials at various temperatures, microstructural evolutions during manufacturing (thermo-mechanical) processes, as well as texture analyses of engineering materials. In the presentation, the current status of TAKUMI, its sample environmental devices, the scientific trends in TAKUMI and some research examples will be introduced.
Harjo, S.; 川崎 卓郎; 相澤 一也
no journal, ,
TAKUMI is a pulsed neutron diffractometer dedicated for materials engineering installed in J-PARC. Experiments in TAKUMI vary from internal strain mapping in engineering components, microstructural evolutions during deformations of structural or functional materials at various temperatures, microstructural evolutions during manufacturing (thermo-mechanical) processes, as well as texture analyses of engineering materials. In order to carry out these experiments, TAKUMI has developed various sample environmental (SE) devices either independently or together with the users. In the presentation, the SE devices and the scientific trends using in situ ND in TAKUMI with some research examples will be introduced.
Harjo, S.
no journal, ,
The large penetrating power of neutrons also allows in-situ investigation of crystallographic information on engineering materials under various environments, including operando monitoring during deformation at a wide temperature range from cryogenic to high temperatures, thermo-mechanical processes, and so on. The pulsed neutron diffraction with the time-of-flight method will be briefly introduced, and a pulsed neutron diffractometer for engineering materials studies in J-PARC with some highlighted researches using operando observations will be introduced.
Harjo, S.
no journal, ,
Neutrons are used to investigate stresses and crystallographic microstructures inside engineering materials, taking advantage of their large penetrating power and the ability to see the arrangement of atoms by diffraction methods. Pulsed neutron diffraction with the time-of-flight method is suitable for microscopic structural observation as a bulk average behavior because of the simultaneous measurement of multiple Bragg peaks. The pulsed neutron diffraction with the time-of-flight method, a pulsed neutron diffractometer for engineering materials studies in J-PARC with some highlighted researches using operando observations will be introduced.
徐 平光; 諸岡 聡; 柴山 由樹; 佐々木 未来; 山本 和喜; 菖蒲 敬久
no journal, ,
Different with the electron backscattering diffraction (EBSD) and the X-ray diffraction for surface layer analysis, the neutron diffraction can collect bulk diffraction information thanks to the coarse beam spot and several ten mm penetrability of the thermal neutrons in most engineering materials, valuable for deeply investigating microscopic microstructure changes and macroscopic mechanical/physical responses of polycrystalline materials. Thanks to close cooperation among international/domestic universities and institutes, Japan has entered a new era of stress and texture evaluation technique using various neutron instruments involving in a steady-state reactor neutron source at Japan Research Reactor No.3 (JRR-3), a large spallation neutron source at J-PARC, and a compact neutron source at RANS. Recently, JRR-3 has restarted to support the neutron diffraction experiments of various engineering materials and realized several interesting research examples. Texture is the crystallographic preferred orientation state of grains in polycrystalline materials, and its optimization may improve the mechanical/physical anisotropic behavior of engineering materials and product parts, leading to an evident economic benefit for such as automobile steel sheets, oriented silicon steel sheets. Nondestructive stress measurement is another important industrial application of RESA neutron instrument, unique to evaluate the strain and stress state inside materials deep to several tens of mm. It contributes significantly to the design and manufacture of mechanical structures aimed at high performance, high reliability and long life, and improves the reliability and structure integrity of a wide range of machinery and structures. We welcome more academic and industrial users to make good use of these large-scale neutron science facilities to nurture more globally competitive talents, achieve world-leading research results and economic benefits.