614 湿潤大気中での変形によるアルミニウム合金への水素侵入挙動(材料と組織,オーガナイズドセッション)

概要

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In late years, fuel cell vehicles (FCVs) using hydrogen as the fuel have been attracting attention in terms of the reduction of CO_2 emissions. In the FCV, the hydrogen gas is stored in tanks that are composed of aluminum liner covered with carbon-fiber-reinforced plastic. It is known that in some aluminum alloys hydrogen embrittlement (HE) occurs. In this study , 6061 and 7071 aluminum alloys were tensile-deformed using slow-strain-rate technique (SSRT) in a moist air filled with heavy-water vapor, and hydrogen invasion behavior was investigated by means of thermal desorption spectroscopy (TDS) where invading hydrogen (deuterium) can be distinguished from internal hydrogen by mass spectrometer. It was revealed that hydrogen invades the 7075 alloy specimen from the environment by the SSRT deformation in the moist air.
社団法人日本機械学会の論文
2008-09-12