湿潤空気中におけるアルミニウム合金切欠き板材の水素脆化特性 Hydrogen embrittlement properties of notched-aluminum alloy plates in humid air

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For 6061-T6 and 7075-T6 aluminum alloy plates, SSRT (slow strain-rate technique) tests in humid air with 90% relative humidity were carried out using a notched tensile specimen to evaluate the susceptibility to hydrogen embrittlement and to appreciate the role of notch in the process of HEAC (hydrogen-environment-assisted cracking). 7075-T6 showed a significant embrittlement due to intergranular cracking more inspired by the existence of notch, while in contrast, 6061-T6 exhibited a trend of an enhanced plastic deformation by hydrogen effects, accompanied with a trace of nonconventional TTS facet in fracture surface and an increase in notch opening displacement in the early stage of still low stress level. The SSRT behaviors of these alloys are explained to result from the mechanism of hydrogen-enhanced localized plasticity, where the process of hydrogen population is supported to include both effects of trapping at microstructural defects such as inclusions and stress-induced diffusion at macroscopic defects such as notch.

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  • 軽金属  

    軽金属 57(2), 74-79, 2007-02-28 

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10018729293
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    8722611
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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