Effects of Hydrogen Environment on Fatigue Characteristics of 18Cr-8Ni Stainless Steel

Abstract:

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In order to clarify the effects of hydrogen on the fatigue characteristics of an austenitic stainless steel, bending fatigue tests were conducted in air, in a hydrogen gas and in a nitrogen gas. Main results obtained are as follows. Effects of hydrogen gas environment are not clearly seen on the strain range - fatigue life diagram, because there are opposite effects to crack propagation and to crack initiation; accelerates crack propagation, but retards crack initiation. Striation spacing or in-situ observation confirms the acceleration. The retardation seems to be attributed to the absence of oxygen or water vapor in the hydrogen gas.

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Periodical:

Edited by:

Jaroslav Pokluda

Pages:

283-286

Citation:

K. Kawamoto et al., "Effects of Hydrogen Environment on Fatigue Characteristics of 18Cr-8Ni Stainless Steel", Materials Science Forum, Vol. 482, pp. 283-286, 2005

Online since:

April 2005

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$38.00

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[3] Han G., He J., Fukuyama S. and Yokogawa K., Acta. Meter., 46-13(1998), 4559-4570. crack crack Electro Polished ○ : in Air △ : in H2 gas ◇ : in N2 gas 50µm 50µm 50µm.

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