Study on Fatigue Life Evaluation Using Small Specimens for Testing Neutron-Irradiated Materials

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...

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Bibliographic Details
Published in:Journal of nuclear science and technology 2011-01, Vol.48 (1), p.60
Main Authors: NOGAMI, Shuhei, ITOH, Takamoto, SAKASEGAWA, Hideo, TANIGAWA, Hiroyasu, WAKAI, Eichi, NISHIMURA, Arata, HASEGAWA, Akira
Format: Article
Language:English
Subjects:
Activation analysis
Cross sections
Fatigue life
Fatigue tests
Martensitic stainless steels
Steels
Strain
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Summary: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.
ISSN:0022-3131
1881-1248
DOI:10.3327/jnst.48.60