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Tobita, Toru; Nishiyama, Yutaka; Otsu, Takuyo; Udagawa, Makoto; Katsuyama, Jinya; Onizawa, Kunio
Journal of Pressure Vessel Technology, 137(5), p.051405_1 - 051405_8, 2015/10
Times Cited Count：14 Percentile：54.16(Engineering, Mechanical)We conducted a series of fracture toughness tests based on the Master curve method for several specimen size and shapes, such as 0.16T-CT, pre-cracked Charpy type, 0.4T-CT and 1T-CT specimens, in commercially manufactured 5 kinds of A533B class1 steels with different impurity contents and fracture toughness levels. The reference temperature (
) values determined from the 0.16T-CT specimens were overall in good agreement with those determined from the 1T-CT specimens. The scatter of the 1T-equivalent fracture toughness values obtained from the 0.16T-CT specimens was equivalent to that obtained from the other larger specimens. The higher loading rate gave rise to a slightly higher , and this dependency was almost the same for the larger specimens. We suggested an optimum test temperature on the basis of the Charpy transition temperature for determining using the 0.16T-CT specimens.
Takamizawa, Hisashi; Tobita, Toru; Otsu, Takuyo; Katsuyama, Jinya; Nishiyama, Yutaka; Onizawa, Kunio
Proceedings of 2015 ASME Pressure Vessels and Piping Conference (PVP 2015) (Internet), 7 Pages, 2015/07
Fracture toughness evaluation by the Master Curve method using miniature compact tension (Mini-C(T)) specimens taken from the broken halves of surveillance Charpy specimens has been proposed. We performed finite element analysis (FEA) to examine the difference in constraint effect of the crack tip for the different size C(T) and precracked Charpy v-notch specimens. The constraint effect for Mini-C(T) specimens in terms of the T-stress and Q-parameter was similar to the larger C(T) specimens. To optimize the fatigue precracking conditions for the Mini-C(T) specimen fabrication, plastic zone distribution analysis was performed. We confirmed the fatigue precrack length and the availability of the mitigated crack shape for Mini-C(T). We also obtained the fracture toughness data for different sizes specimen. It was shown that To obtained from the Mini-C(T) specimens is in reasonably good agreement with that from others. We compared the fracture toughness data with T41J based fracture toughness curves proposed in recent study. All of the data were well enveloped by the proposed lower bound curve.
Tobita, Toru; Nishiyama, Yutaka; Otsu, Takuyo; Udagawa, Makoto; Katsuyama, Jinya; Onizawa, Kunio
Proceedings of 2013 ASME Pressure Vessels and Piping Conference (PVP 2013) (DVD-ROM), 8 Pages, 2013/07
Mini-CT (0.16T-CT) specimens up to eight can be taken from broken halves of surveillance Charpy specimens. We conducted a series of fracture toughness tests based on the Master curve method for several specimen size and shapes, such as 0.16T-CT, pre-cracked Charpy type, 0.4T-CT and 1T-CT specimens, in commercially manufactured 5 kinds of A533B class1 steels with different impurity contents and fracture toughness levels. Reference temperature To of 0.16T-CT specimens was approximately equal to those of 1T-CT and other type of specimens for all materials. We also examined a loading rate effect on TO of Mini-CT specimens for some materials within the specified range in the test method. Higher loading rate gave rise to slightly higher TO. The difference in TO between upper and lower loading rate of the standard was approximately 10
C.
Makino, Amane*; Sueyoshi, Kuni*; Suzuki, Yuji*; Kawachi, Naoki; Tawaraya, Keitaro*; Otsu, Naoko*; Nakanishi, Hiromi*; Fujiwara, Toru*
Nihon Dojo Hiryo Gaku Zasshi, 82(2), p.152 - 159, 2011/04
This paper is a proceeding of the fourth division (Plant nutrition) symposium theme of discussed in the annual conference of 2011 soil science and plant nutrition at Hokkaido University. N. Kawachi, an author who takes charge of third section, discuss nutritional physiology revealed by imaging analysis of element kinetics in plants. This section focuses on introducing a RI imaging system developed in Japan Atomic Energy Agency. In addition, it is expressed that the analytical research conducted on nutritional physiology in plants as revealed by imaging of element kinetics.
Otsuka, Hideo; Hojo, Kiichi; Maeta, Hiroshi*; Otsu, Hitoshi; Sugai, Hiroyuki; Yamamoto, Hiroyuki
European Physical Journal D, 16(1-3), p.309 - 311, 2001/09
no abstracts in English
O
during H
or He
ion irradiationSasajima, Naohiko*; Matsui, Tsuneo*; Furuno, Shigemi*; Hojo, Kiichi; *
Nuclear Instruments and Methods in Physics Research B, 148(1-4), p.745 - 751, 1999/00
Times Cited Count：36 Percentile：90.62(Instruments & Instrumentation)no abstracts in English
Hojo, Kiichi; *; Furuno, Shigemi*; *; Kushita, Kohei; Sasajima, Naohiko*
Nuclear Instruments and Methods in Physics Research B, 148(1-4), p.720 - 725, 1999/00
Times Cited Count：4 Percentile：38.4(Instruments & Instrumentation)no abstracts in English
O irradiated with H ionsFuruno, Shigemi*; Sasajima, N.*; Hojo, Kiichi; *; *; Matsui, Tsuneo*
Journal of Nuclear Materials, 258-263, p.1817 - 1821, 1998/00
Times Cited Count：8 Percentile：57.22(Materials Science, Multidisciplinary)no abstracts in English
Hojo, Kiichi; *; Furuno, Shigemi; Kushita, Kohei; *; Sasajima, Naohiko*
Nuclear Instruments and Methods in Physics Research B, 141(1-4), p.148 - 153, 1998/00
Times Cited Count：31 Percentile：89.54(Instruments & Instrumentation)no abstracts in English
Hojo, Kiichi; Furuno, Shigemi; *; *; *
Nuclear Instruments and Methods in Physics Research, 127-128, p.203 - 207, 1997/00
no abstracts in English
O and MgAlO
Furuno, Shigemi; Sasajima, Naohiko*; Hojo, Kiichi; *; *; Matsui, Tsuneo*; Muromura, Tadasumi
Nuclear Instruments and Methods in Physics Research B, 127-128, p.181 - 185, 1997/00
Times Cited Count：25 Percentile：85.76(Instruments & Instrumentation)no abstracts in English
Hojo, Kiichi; *; Furuno, Shigemi; Sasajima, Naohiko*; *
Journal of Nuclear Materials, 239(1-3), p.279 - 283, 1996/00
Times Cited Count：14 Percentile：74.12(Materials Science, Multidisciplinary)no abstracts in English
O single crystals irradiated with He and Xe ions at room temperatureHojo, Kiichi; Furuno, Shigemi; *; Sasajima, Naohiko*; *; Matsui, Tsuneo*; Muromura, Tadasumi
Microstructures and Functions of Materials (ICMFM 96), 0, p.269 - 272, 1996/00
no abstracts in English
Hojo, Kiichi; Furuno, Shigemi; Kushita, Kohei; *; *; *
Nuclear Instruments and Methods in Physics Research B, 116, p.382 - 388, 1996/00
Times Cited Count：32 Percentile：91(Instruments & Instrumentation)no abstracts in English
O) during helium- and xenon-ion irradiationsSasajima, Naohiko*; Matsui, Tsuneo*; Furuno, Shigemi; Hojo, Kiichi; *; Muromura, Tadasumi; *
Proc. of Int. Conf. on Microstructures and Functions of Materials (ICMFM 96), 0, p.265 - 268, 1996/00
no abstracts in English
Hojo, Kiichi; Furuno, Shigemi; *; Kushita, Kohei; ; *
Microsc. Microanal. Microstruct., 6, p.141 - 147, 1995/02
Times Cited Count：2 Percentile：23.42(Microscopy)no abstracts in English
Hojo, Kiichi; Furuno, Shigemi; ; *
Denshi Kenbikyo, 29(1), p.26 - 34, 1994/00
no abstracts in English
Hojo, Kiichi; ; Furuno, Shigemi; *; *
Journal of Nuclear Materials, 212-215, p.281 - 286, 1994/00
Times Cited Count：16 Percentile：77(Materials Science, Multidisciplinary)no abstracts in English
Sawai, Tomotsugu; Fukai, Katsumaro; Jitsukawa, Shiro; ; Hishinuma, Akimichi
Journal of Nuclear Materials, 212-215, p.453 - 457, 1994/00
Times Cited Count：4 Percentile：42.34(Materials Science, Multidisciplinary)no abstracts in English
-SiC crystals during helium and hydrogen dual-ion irradiationsHojo, Kiichi; Furuno, Shigemi; Kushita, Kohei; ; *
Nuclear Instruments and Methods in Physics Research B, 91, p.534 - 539, 1994/00
Times Cited Count：6 Percentile：57.15(Instruments & Instrumentation)no abstracts in English
