Application of local approach to hydrogen embrittlement fracture evaluation of high strength steels

Shusaku Takagi, Satoshi Terasaki, Kaneaki Tsuzaki, Tadanobu Inoue, Fumiyoshi Minami

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

6 被引用数 (Scopus)

抄録

A new method for evaluating the hydrogen embrittlement (HE) susceptibility of ultra high strength steel was studied in order to propose a new method for assessing the delayed fracture property. The material used was 1400MPa tempered martensitic steel with the chemical composition 0.40C-0.24Si-0.81Mn-1.03Cr-0. 16Mo(mass%). The local approach originally used for evaluating the brittle fracture property was applied to HE susceptibility assessment after modifying the method to include the effect of hydrogen content. Critical HE data used in the modified local approach was obtained by a stepwise test in which alternating processes of stress increase and stress holding were repeated until the specimen fractured. The specimen used in the stepwise test was 10 mm in diameter and the stress concentration factor was 4.9. Assessment of HE susceptibility for specimens with other dimensions entailed the use of a critical hydrogen content for failure, Hc, representing the maximum hydrogen content among the unfractured specimens in the HE test with constant loading. Matters to be noted for obtaining the material parameters are discussed.

本文言語英語
ホスト出版物のタイトルSupplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
ページ2155-2161
ページ数7
PART 3
出版ステータス出版済み - 12月 1 2007
外部発表はい
イベント5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, カナダ
継続期間: 7月 4 20067月 8 2006

出版物シリーズ

名前Materials Science Forum
番号PART 3
539-543
ISSN(印刷版)0255-5476

その他

その他5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
国/地域カナダ
CityVancouver
Period7/4/067/8/06

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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