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Conference Paper

Fatigue strength assessment of SUS316 by small bulge fatigue (SBF) test

Authors:

S. Komazaki ,

Kagoshima University
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R. Jojima,

Kagoshima University
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N. Muraoka,

Kobe Material Testing Laboratory Co., Ltd.
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S. Nogami,

Tohoku University
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M. Kamaya,

Institute of Nuclear Safety System, Incorporated
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C. Hisaka,

Kobe Material Testing Laboratory Co., Ltd.
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M. Fujiwara,

Kobe Material Testing Laboratory Co., Ltd.
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A. Nitta

Kobe Material Testing Laboratory Co., Ltd.
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Abstract

A new fatigue test apparatus with a small disk-type specimen (8 mm in diameter) was developed in the authors’ group. This testing technique was termed “Small Bulge Fatigue (SBF) test”. Unlike the small punch (SP) test, a hydraulic bulging method was adopted for avoiding problems attributable to the contact or the friction between ball and specimen. A cyclic oil pressure could be alternatively applied to both specimen surfaces at the frequency of 10 Hz. The specimen thickness of central region (gauge area) was relatively reduced to avoid cracking at the edge of specimen, and the characteristic small disk-type specimen with flat and concave surfaces was proposed considering machinability and handleability. Austenitic stainless steel SUS316 was subjected to the preliminary test using this newly developed testing technique. The obtained results indicated that this SBF test had a potential for fatigue strength assessment.
How to Cite: Komazaki, S., Jojima, R., Muraoka, N., Nogami, S., Kamaya, M., Hisaka, C., Fujiwara, M. and Nitta, A., 2018. Fatigue strength assessment of SUS316 by small bulge fatigue (SBF) test. Ubiquity Proceedings, 1(S1), p.32. DOI: http://doi.org/10.5334/uproc.32
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Published on 10 Sep 2018.
Peer Reviewed

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