Effect of Morphology of Copper Precipitation Particles on Hydrogen Embrittlement Behavior in Cu-Added Ultra Low Carbon Steel

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Changes in fracture and hydrogen evolution behaviors in Cu-added ultra low carbon steels due to hydrogen charging were examined by small punch (SP) tests and thermal desorption spectroscopic (TDS) analyses, respectively, to understand effect of morphology of copper precipitation particles on susceptibility to hydrogen embrittlement. The SP tests and TDS analyses were applied to the hydrogen-charged steels, which had been thermally aged at 500°C for duration ranging from 2×10<SUP>3</SUP> to 5×10<SUP>6</SUP> s and provided with various kinds of fine particles. Experimental results revealed that the higher strength steel has a larger reduction in strength due to hydrogen charging. This degradation of the strength due to hydrogen charging was strongly dependent on the morphology of copper precipitation particles although, basically, the degradation had a tendency to be more pronounced with increasing hydrogen content. More hydrogen can be allowed in the steel in which the ε-copper exists. The grown copper particles, such as an ε-copper, are preferable to the copper clusters and/or the twinned 9R structures as trapping site for hydrogen and contribute the suppression of the reduction in strength caused by hydrogen.

収録刊行物

  • Materials transactions

    Materials transactions 43(9), 2213-2218, 2002-09-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012326020
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6312684
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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