Effect of High-pressure H2 Gas on Tensile and Fatigue Properties of Stainless Steel SUS316L by Means of the Internal High-pressure H2 Gas Method
Abstract
For prohibiting a global warming, fuel-cell systems without carbon dioxide emissions are a one of the promising technique. In case of a fuel-cell vehicle (FCV), high-pressure H2 gas is indispensable for a long running range. Although there are lot of paper for studying a hydrogen embrittlement (HE), there are few paper referred to the effect of high-pressure H2on the HE phenomenon.
In this study, an effect of high-pressure H2 gas on tensile & fatigue properties of stainless steel SUS316L were investigated by means of the internal high-pressure H2 gas technique. Main findings of this study are as follows;
- Although there are almost no hydrogen embrittlement effect on the 0.2 % proof stress and tensile strength, elongation and reduction of area decrease in H2 gas environment,
- For case of low Nieq material, fatigue life and fatigue limit decrease in H2 gas environment,
- For case of low Nieq material, not a few α’ martensitic phase generated on the fatigue fractured specimen.
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2019 The Authors. Published by Elsevier B.V. (CC BY-NC-ND 4.0)