Fatigue crack growth characteristics of JIS SUS316L austenitic stainless steel in a hydrogen gas environment

Kyohei Kawamoto, Oda Yasuji, Hiroshi Noguchi, Kenji Higashida

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Abstract

In order to clarify the effects of a hydrogen gas environment on the fatigue characteristics of stable austenitic stainless steels, bending fatigue tests were carried out on SUS316L in a H2 gas, in a N2 gas of 1.0 MPa and in air. The fatigue tests were also carried out on a metastable austenitic steel SUS304 as a material for the comparison. The main results obtained are as follows. Hydrogen gas accelerates the fatigue crack growth rates of both materials. The fracture surfaces of the both materials consist of two parts practically; the faceted area seemed to be brittle and the remaining area seemed to be ductile. The faceted area does not significantly contribute to the acceleration of the fatigue crack growth rate, but the ductile fracture mode predominantly does. The slip-off mechanism seems to be valid not only in air and in N2, but also in H2. The fatigue crack growth acceleration by hydrogen occurs in this mechanism. The difference of the degree of the acceleration, which is smaller in SUS316L than in SUS304, seems to be caused by the difference in the stability of γ phase.

Original languageEnglish
Pages (from-to)1525-1532
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume72
Issue number10
Publication statusPublished - Oct 2006

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Austenitic stainless steel
Fatigue crack propagation
Hydrogen
Gases
Fatigue of materials
Bending (deformation)
Ductile fracture
Austenitic steel
Air
SUS 316L

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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abstract = "In order to clarify the effects of a hydrogen gas environment on the fatigue characteristics of stable austenitic stainless steels, bending fatigue tests were carried out on SUS316L in a H2 gas, in a N2 gas of 1.0 MPa and in air. The fatigue tests were also carried out on a metastable austenitic steel SUS304 as a material for the comparison. The main results obtained are as follows. Hydrogen gas accelerates the fatigue crack growth rates of both materials. The fracture surfaces of the both materials consist of two parts practically; the faceted area seemed to be brittle and the remaining area seemed to be ductile. The faceted area does not significantly contribute to the acceleration of the fatigue crack growth rate, but the ductile fracture mode predominantly does. The slip-off mechanism seems to be valid not only in air and in N2, but also in H2. The fatigue crack growth acceleration by hydrogen occurs in this mechanism. The difference of the degree of the acceleration, which is smaller in SUS316L than in SUS304, seems to be caused by the difference in the stability of γ phase.",
author = "Kyohei Kawamoto and Oda Yasuji and Hiroshi Noguchi and Kenji Higashida",
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TY - JOUR

T1 - Fatigue crack growth characteristics of JIS SUS316L austenitic stainless steel in a hydrogen gas environment

AU - Kawamoto, Kyohei

AU - Yasuji, Oda

AU - Noguchi, Hiroshi

AU - Higashida, Kenji

PY - 2006/10

Y1 - 2006/10

N2 - In order to clarify the effects of a hydrogen gas environment on the fatigue characteristics of stable austenitic stainless steels, bending fatigue tests were carried out on SUS316L in a H2 gas, in a N2 gas of 1.0 MPa and in air. The fatigue tests were also carried out on a metastable austenitic steel SUS304 as a material for the comparison. The main results obtained are as follows. Hydrogen gas accelerates the fatigue crack growth rates of both materials. The fracture surfaces of the both materials consist of two parts practically; the faceted area seemed to be brittle and the remaining area seemed to be ductile. The faceted area does not significantly contribute to the acceleration of the fatigue crack growth rate, but the ductile fracture mode predominantly does. The slip-off mechanism seems to be valid not only in air and in N2, but also in H2. The fatigue crack growth acceleration by hydrogen occurs in this mechanism. The difference of the degree of the acceleration, which is smaller in SUS316L than in SUS304, seems to be caused by the difference in the stability of γ phase.

AB - In order to clarify the effects of a hydrogen gas environment on the fatigue characteristics of stable austenitic stainless steels, bending fatigue tests were carried out on SUS316L in a H2 gas, in a N2 gas of 1.0 MPa and in air. The fatigue tests were also carried out on a metastable austenitic steel SUS304 as a material for the comparison. The main results obtained are as follows. Hydrogen gas accelerates the fatigue crack growth rates of both materials. The fracture surfaces of the both materials consist of two parts practically; the faceted area seemed to be brittle and the remaining area seemed to be ductile. The faceted area does not significantly contribute to the acceleration of the fatigue crack growth rate, but the ductile fracture mode predominantly does. The slip-off mechanism seems to be valid not only in air and in N2, but also in H2. The fatigue crack growth acceleration by hydrogen occurs in this mechanism. The difference of the degree of the acceleration, which is smaller in SUS316L than in SUS304, seems to be caused by the difference in the stability of γ phase.

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JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

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