ステンレス鋼の疲労き裂進展特性に及ぼす水素の影響とマルテンサイト変態

• 金崎 俊彦

  九州大学大学院工学府

• 楢崎 千尋

  九州大学大学院工学府 [現 : (株) 東芝]

• 峯 洋二

  九州大学大学院工学研究院

• 松岡 三郎

  九州大学大学院工学研究院

• 村上 敬宜

  九州大学大学院工学研究院

書誌事項

タイトル別名

• Effect of Hydrogen on Fatigue Crack Growth and Martensitic Transformation of Stainless Steels
• ステンレス コウ ノ ヒロウ キレツ シンテン トクセイ ニ オヨボス スイソ ノ エイキョウ ト マルテンサイト ヘンタイ

抄録

The effect of hydrogen on fatigue crack growth behavior of four stainless steels has been investigated from the viewpoint of martensitic transformation. The crack growth rates in hydrogen-charged SUS304 and SUS316 were accelerated. The crack growth rate in hydrogen-charged SUS316L was slightly higher than uncharged SUS316L. However, the crack growth rate in SUS405 hardly changed in comparison with uncharged specimens. The matensitic transformation on fatigue fracture surface was detected by X-ray diffraction both in hydrogen-charged and uncharged specimens of SUS304, SUS316 and even in SUS316L. However, the fracture surface of SUS316L, in which the crack growth rate was increased slightly by hydrogen, showed less martensitic transformation than that of SUS304 or SUS316. It is presumed that martensitic transformation in the vicinty of fatigue crack tip contributed to the effect of hydrogen on crack growth rate. Fatigue tests of SUS304 and SUS316L, which were pre-strained at -70°C to enhance a martensitic transformation, were carried out to study the influence of hydrogen and martensite on crack growth. Crack growth rate was remakably increased by hydroggen in not only pre-strained SUS304 but also in pre-strained SUS316L. The hydrogen content of pre-strained hydrogen-charged specimen was much higher than unstrained hydrogen-charged specimens due to the increase in martensite through which hydrogen diffuses much easier and faster than through austenite. The slip bands around crack tip in the hydrogen-charged specimens were less and more discrete than that in the uncharged specimens.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 72 (723), 1717-1724, 2006

  一般社団法人 日本機械学会

キーワード

• Fatigue
• Hydrogen
• Crack Propagation
• Strain-induced Martensite
• X-ray Diffraction
• Pre-strain
• Stainless Steels

詳細情報

• CRID: 1390282679454115328
• NII論文ID: 110004997338
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.72.1717
• COI: 1:CAS:528:DC%2BD2sXhvFSksbg%3D
• ISSN: 18848338
• ISSN: 03875008
• ISSN: http://id.crossref.org/issn/03875008
• NDL書誌ID: 8589756
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8589756
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/72/723/72_723_1717/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可