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

doi:10.3327/jnst.48.60

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

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

12 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 language	English
Pages (from-to)	60-64
Number of pages	5
Journal	journal of nuclear science and technology
Volume	48
Issue number	1
DOIs	https://doi.org/10.3327/jnst.48.60
Publication status	Published - 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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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.",

keywords = "F82H, Fatigue life, Fusion reactor blanket, IFMIF, Reduced activation ferritic/martensitic steel, Small specimen, Specimen shape, Specimen size",

author = "Shuhei Nogami and Takamoto Itoh and Hideo Sakasegawa and Hiroyasu Tanigawa and Eichi Wakai and Arata Nishimura and Akira Hasegawa",

note = "Funding Information: This work was supported by the Broader Approach (BA) activity. A part of the experimental works in this study was carried out under the joint-use program of the International Research Center for Nuclear Materials Science, Institute for Materials Research, Tohoku University.",

year = "2011",

doi = "10.3327/jnst.48.60",

language = "English",

volume = "48",

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AU - Itoh, Takamoto

AU - Sakasegawa, Hideo

AU - Tanigawa, Hiroyasu

AU - Wakai, Eichi

AU - Nishimura, Arata

AU - Hasegawa, Akira

N1 - Funding Information: This work was supported by the Broader Approach (BA) activity. A part of the experimental works in this study was carried out under the joint-use program of the International Research Center for Nuclear Materials Science, Institute for Materials Research, Tohoku University.

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

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KW - Fatigue life

KW - Fusion reactor blanket

KW - IFMIF

KW - Reduced activation ferritic/martensitic steel

KW - Small specimen

KW - Specimen shape

KW - Specimen size

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

Abstract

Keywords

ASJC Scopus subject areas

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