カソード分極に伴う50.9at%Ni-Ti合金の水素脆化 Hydrogen Embrittlement of 50.9at%Ni-Ti Alloy Caused by Cathodic Polarization

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To clarify the cause of delayed fracture of a glasses frame made of Ni-Ti alloy and to establish an appropriate countermeasure against hydrogen embrittlement, the diffusion coefficient of hydrogen <i>D<sub>H</sub></i> in a 50 9at%Ni-Ti alloy and changes in the load-elongation curve due to cathodic polarization were investigated. Cathodic polarization introduced large amounts of hydrogen. <i>D<sub>H</sub></i> was calculated from the polarization time dependence of the hydrogen content, and the temperature dependence of <i>D<sub>H</sub></i> was obtained to be <i>D<sub>H</sub></i>=257×10<sup>-7</sup>(m<sup>2</sup>/s) exp (-382(kJ/mol)/<i>RT</i>). Cathodic polarization caused hydrogen embrittlement. A marked decrease in elongation occurred as the polarization time and the aging time at room temperature after polarization increased. This is attributed to an increase in the penetration depth of hydrogen.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 48(8), 826-831, 1997-08-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002259635
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4275776
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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