In Situ Observation of Void Nucleation and Growth in a Steel using X-ray Tomography

• Seo Dowon

  Dept. of Mech. Eng., Kyushu Univ.

• Toda Hiroyuki

  Dept. of Mech. Eng., Kyushu Univ.

• Kobayashi Masakazu

  Dept. of Mech. Eng., Toyohashi Univ. of Tech.

• Uesugi Kentaro

  Japan Synchrotron Radiation Research Institute

• Takeuchi Akihisa

  Japan Synchrotron Radiation Research Institute

• Suzuki Yoshio

  Japan Synchrotron Radiation Research Institute

抄録

In situ synchrotron X-ray computed tomography has been applied to visualize and quantify the void nucleation, growth and coalescence leading to ductile fracture in a free-cutting steel. Uniaxial tensile test was performed and interrupted at different strain levels in order to understand the sequential damage process. Each void detected by the absorption contrast was sequentially tracked with increasing strain. Quantitative data obtained by this method was then used to compare and validate the several pre-existing models predicting the damage evolution. The gap between the void nucleation predictions and the experimental results was widened with increasing strain at high strain regime, because of the restrictive observation of voids and the void coalescence. The models predicting the void growth were also discussed with reassessing the constant α to take the reduction in equivalent diameter by nucleating voids.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 55 (7), 1474-1482, 2015

  一般社団法人 日本鉄鋼協会

キーワード

• ductile fracture
• X-ray tomography
• void nucleation
• void growth

詳細情報

• CRID: 1390001206488510336
• NII論文ID: 130005089764
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.55.1474
• ISSN: 13475460
• ISSN: 09151559
• HANDLE: 2324/4149937
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/55/7/55_1474/_pdf
• 本文言語コード: en
• データソース種別:
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  • IRDB
  • Crossref
  • CiNii Articles
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