Study on fatigue life evaluation using small specimens for testing neutron-irradiated materials

Shuhei Nogami, Takamoto Itoh, Hideo Sakasegawa, Hiroyasu Tanigawa, Eichi Wakai, Arata Nishimura, Akira Hasegawa

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effect of specimen size and shape on the fatigue life of reduced activation ferritic/martensitic steel "F82H IEA-heat" was investigated to develop a fatigue life evaluation method using a small specimen for testing neutron-irradiated materials. The fatigue test was carried out at room temperature in air using three kinds of round-bar specimen (minimum diameter cross sections of 1, 4, and 7 mm) and one hourglass specimen (minimum diameter cross section of 1.25 mm). The effect of specimen size on fatigue life from a level of 103 to 104 cycles was almost negligible for the round-bar specimens. The shorter fatigue life at the total strain range below 0.6% and the slightly longer fatigue life at the total strain range above 0.8% of the hourglass specimen relative to that of the standard specimen were observed from a level of 102 to 104 cycles.

Original languageEnglish
Pages (from-to)60-64
Number of pages5
Journaljournal of nuclear science and technology
Volume48
Issue number1
DOIs
Publication statusPublished - 2011

Keywords

  • F82H
  • Fatigue life
  • Fusion reactor blanket
  • IFMIF
  • Reduced activation ferritic/martensitic steel
  • Small specimen
  • Specimen shape
  • Specimen size

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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