SCM435鋼の疲労における水素感受性への影響因子と影響度の解析

DOI

書誌事項

タイトル別名
  • Factors that affect hydrogen susceptibility of fatigue life in SCM435 steel and analysis of their impacts

抄録

High strength Cr-Mo steels are useful for high performance machinery and equipment. Factors that affect hydrogen susceptibility of fatigue lives have been explored and analyzed quantitatively by using SCM435 steel of various purities. Logarithm of fatigue life ratio log (RNf) , which means the fatigue life of hydrogen charged specimen normalized by that of non-charged one, is proportional to H (450K) that means the amount of hydrogen evolved up to 450K in thermal desorption spectroscopy (TDS) measurement. The proportional coefficient is negative and changes in accordance with the square of phosphorous content of the specimen. The intercept of log (RNf) is zero for soaking in FIP solution, but it becomes log (0. 2) to log (0. 4) for cathodic hydrogen charging. The log (RNf) is lowered by increase in tensile strength. Supposing that the degradation be independent with hydrogen and phosphorous contents, this term could be proportional to tensile strength. Within the experimental range, the fatigue life ratio RNf can be expressed by the following equation, <br> log RNf(est) =log (rpit) -1500•H(450K) •P2-0. 0045•TS+4. 8<br>Here rpit is the correction factor for corrosion pit, P is phosphorous content, TS is tensile strength in MPa

収録刊行物

  • 圧力技術

    圧力技術 50 (5), 254-262, 2012

    一般社団法人 日本高圧力技術協会

キーワード

詳細情報 詳細情報について

  • CRID
    1390001204615928576
  • NII論文ID
    130004446898
  • DOI
    10.11181/hpi.50.254
  • ISSN
    13479598
    03870154
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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