Abstract
High strength aluminum alloys are expected as a candidate material of liner materials for high-pressure hydrogen containers. In this study, aluminum alloys of A6061-T6 and A7075-T6 were offered. The Effects of hydrogen on the fatigue properties are evaluated by fatigue tests in air, steam and deuterium atmospheres at 30℃ and 90% relative humidity. As the result, the A6061-T6 aluminum alloy is found to be possible to apply high-pressure hydrogen containers of fuel vehicles, since the increasing rate of the crack growth speed is smaller than that of A7075-T6.
