Abstract
In recently years, environmental problems, such as global warming and exhaustion of fossil fuels, have grown into serious problems. In the automakers, the development of the fuel cell vehicles using hydrogen as clean energy has been paid attention to. Aluminum alloys have already been applied to a liner material of a high-pressure hydrogen tank for fuel cell vehicles. However, the behavior of hydrogen in aluminum alloys has not been clearly elucidated yet. Therefore, it is necessary to analyze the hydrogen behavior in aluminum alloys. Hydrogen microprint technique (HMPT) has been known as an effective measure to investigate the hydrogen behavior. In the present study, the emission behavior of internal hydrogen on a tensile-deformed Al-9%Mg alloy was investigated by HMPT at room temperature. As a result, the hydrogen was emitted at some grain boundaries.
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