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Dive into the research topics where Fumiki Takada is active.

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Featured researches published by Fumiki Takada.


Journal of Nuclear Materials | 2002

Development of a remote-controlled fatigue test machine using a laser extensometer for investigation of irradiation effect on fatigue properties

Minoru Yonekawa; T. Ishii; Masao Ohmi; Fumiki Takada; Taiji Hoshiya; Motoji Niimi; Ikuo Ioka; Yukio Miwa; H. Tsuji

Abstract In order to investigate effects of neutron irradiation on fatigue properties of nuclear materials, a remote-controlled high temperature fatigue test machine was developed at the hot laboratory of the Japan Materials Testing Reactor (JMTR) in the Japan Atomic Energy Research Institute (JAERI). A small-sized fatigue specimen having double blades to measure strain with a laser extensometer was designed for this machine. A strain amplitude in fatigue tests of a completely reversed push-pull type using a triangular wave was controlled with an accuracy of ±3% of the total strain range during test. Low cycle fatigue tests of type 304 stainless steel irradiated in JMTR at 823 K up to a fast neutron fluence of 1×1025 n/m2 (E>1 MeV) were performed in total strain ranges of 0.7–1.4% at 823 K using the designed small-sized specimens.


Journal of Nuclear Materials | 2005

Radiation hardening and -embrittlement due to He production in F82H steel irradiated at 250 °C in JMTR

E. Wakai; Shiro Jitsukawa; H. Tomita; Kazuyuki Furuya; M. Sato; K. Oka; T. Tanaka; Fumiki Takada; T. Yamamoto; Yoshio Kato; Yoshinobu Tayama; Koreyuki Shiba; S. Ohnuki


Journal of Nuclear Materials | 2004

Effect of tempering temperature and time on tensile properties of F82H irradiated by neutrons

E. Wakai; T. Taguchi; T. Yamamoto; Fumiki Takada


Fusion Engineering and Design | 2006

Mechanical properties of small size specimens of F82H steel

E. Wakai; H. Ohtsuka; Shingo Matsukawa; Kazuyuki Furuya; Hiroyasu Tanigawa; K. Oka; S. Ohnuki; T. Yamamoto; Fumiki Takada; Shiro Jitsukawa


Materials Transactions | 2005

Effects of Helium Production and Heat Treatment on Neutron Irradiation Hardening of F82H Steels Irradiated with Neutrons

E. Wakai; T. Taguchi; Toshio Yamamoto; Hideki Tomita; Fumiki Takada; Shiro Jitsukawa


Materials Transactions | 2004

Mechanical Property of F82H Steel Doped with Boron and Nitrogen

E. Wakai; Shingo Matsukawa; Toshio Yamamoto; Yoshiaki Kato; Fumiki Takada; M. Sugimoto; Shiro Jitsukawa


Archive | 1995

Holder of fatigue test piece

Masao Ohmi; Fumiki Takada; Minoru Kizaki


Jsme International Journal Series A-solid Mechanics and Material Engineering | 2002

Study on Creep-Fatigue Life of Irradiated Austenitic Stainless Steel

Ikuo Ioka; Yukio Miwa; H. Tsuji; Minoru Yonekawa; Fumiki Takada; Taiji Hoshiya


Journal of Nuclear Materials | 2005

The effect of neutron irradiation on mechanical properties of YAG laser weldments using previously irradiated material

Hirokazu Yamada; Hiroshi Kawamura; K. Tsuchiya; George Kalinin; Yoshiharu Nagao; Fumiki Takada; Masahiro Nishikawa


Fusion Science and Technology | 2005

Effect of Initial Heat Treatment on DBTT of F82H Steel Irradiated by Neutrons

E. Wakai; Masami Ando; S. Matsukawa; T. Taguchi; T. Yamamoto; H. Tomita; Fumiki Takada

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E. Wakai

Japan Atomic Energy Agency

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Shiro Jitsukawa

Japan Atomic Energy Research Institute

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T. Taguchi

Japan Atomic Energy Research Institute

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T. Yamamoto

Japan Atomic Energy Research Institute

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Taiji Hoshiya

Japan Atomic Energy Research Institute

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H. Tsuji

Japan Atomic Energy Research Institute

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Ikuo Ioka

Japan Atomic Energy Research Institute

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Minoru Yonekawa

Japan Atomic Energy Research Institute

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Toshio Yamamoto

Japan Atomic Energy Research Institute

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Yukio Miwa

Japan Atomic Energy Research Institute

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