107 水素マイクロプリント法によるアルミニウム合金中の水素の挙動解析(OS7-(2) 材料損傷の機構・実験評価,オーガナイズドセッション)

概要

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The 6061 aluminum alloy is being used as a liner material of a high-pressure hydrogen tank for the fuel cell vehicles. Since higher maximum filling pressure is demanded to achieve longer mileage per fuel filling, application of other alloys having higher strength is considered. However, some aluminum alloys are reported to cause hydrogen embrittlement. The cause of hydrogen embrittlement and behavior of hydrogen in the alloy has not been clarified yet. Hydrogen microprint technique (HMPT) is an effective method to investigate the hydrogen behavior, in which the reaction between silver bromide emulsion and atomic hydrogen emitted from the sample is used. In the present study, the behavior of hydrogen in 6061 aluminum alloy and aluminum with 99.99% purity has been investigated by means of HMPT. Two kinds of hydrogen have been in concern: (i) environmental (external ) hydrogen introduced by cathodic electrolytic charging and emitted naturally, (ii) impurity (internal ) hydrogen emitted by plastic deformation.
一般社団法人日本機械学会の論文
2009-08-25