成果報告書詳細
管理番号100013788
タイトル*平成20年度中間年報 水素社会構築共通基盤整備事業 水素インフラ等に係る規制再点検及び標準化のための研究開発 水素用アルミ材料の基礎研究
公開日2009/4/24
報告書年度2008 - 2008
委託先名社団法人日本アルミニウム協会 住友軽金属工業株式会社 三菱アルミニウム株式会社 古河スカイ株式会社 日本軽金属株式会社 株式会社神戸製鋼所 昭和電工株式会社
プロジェクト番号P05012
部署名燃料電池・水素技術開発部
和文要約以下本編抜粋:平成15、16年度は、「水素安全利用等基盤技術開発---水素に関する共通基盤技術開発」において、高圧水素容器ライナー用アルミニウム合金の水素脆化に対する安全性の評価と材料選定のスクリーニング試験法として、水素実環境を模擬できる安全且つ簡便な水蒸気分圧制御環境下SSRT試験法を開発するとともに、本試験法により多くの水素脆化感受性評価データを取得した。
英文要約Abstract of the Result of the Development in 2008 Fiscal Year "Establishment of codes and standards for hydrogen economy society --Fuel cell vehicles, Distributed fuel cell system installed into houses, Hydrogen infrastructures--" --Basic Research on Aluminum-Based Materials for Hydrogen-- G.ITOH; Ibaraki University S.OSAKI; Yamaguchi University K.OKUDA; Kyoto University K.Horikawa; Osaka University T.MOTEGI; Chiba Institute of Technology Y.SASAKI and H.YABUTA; Japan Aluminum Association H.UTO; Sumitomo Light Metal Industries, Ltd K.KOYAMA and K.ICHITANI; Furukawa-Sky Aluminum Corp. P.Z.ZHAO; Nippon Light Metal Co., Ltd. M.Nakai; Kobe Steel, Ltd. Introduction The goal of this project is to acquire the data that become the index of the container design or the alloy design of the highly reliable aluminum alloy for hydrogen utilization, by assessing the sensitivity to hydrogen embrittlement, by developing the assessment method and by clarifying the invasion and diffusion route of hydrogen, for the aluminum alloys for high-pressure hydrogen container liner. Although examinations on the material properties under real high-pressure hydrogen gas atmosphere are needed to reach the above goal, a large number of examinations are difficult to conduct, considering the safety of the examination. Hence in this project, in 2003 and 2004 fiscal years, examinations under air environments with controlled humidity was proposed as a safe and convenient alternative testing method that is effective to the material screening. This method utilizes a high-fugacity hydrogen gas generated on the reaction between the metallic aluminum and water vapor. Slow strain rate technique, SSRT, tensile test and fatigue test have been being made in the humidity-controlled air. A great deal of data have been being acquired by this alternative assessment method. In 2005 and 2006 fiscal year, the effectiveness of this assessment method is being ascertained by comparing the data on some typical materials that are obtained in the present SSRT test with those that are obtained under a real high-pressure hydrogen gas environment. Together with this, the data obtained in the humidity-controlled air is being correlated to the behavior of migration and accumulation of the hydrogen in the materials, and an attempt will be made to propose a standardization in ISO after additional basic investigation. Since hydrogen embrittlement is closely correlated to the localization of hydrogen depending on microstructure, environment and stress state, it is important to elucidate the role of the distribution of second-phase particles, grain size and stress concentration. The data on the three aspects are being acquired as many as possible on the 6061 aluminum alloys, promising candidates for the liner, as well as high-strength 6000-series aluminum alloys which may contribute to the reduction of the liner weight.
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