Application of Diffraction-Amalgamated Grain Boundary Tracking to Fatigue Crack Propagation Behavior in High Strength Aluminum Alloy

• Li Hui

  Department of Mechanical Engineering, Toyohashi University of Technology

• Toda Hiroyuki

  Department of Mechanical Engineering, Kyushu University

• Uesugi Kentaro

  Japan Synchrotron Radiation Research Institute (JASRI)

• Takeuchi Akihisa

  Japan Synchrotron Radiation Research Institute (JASRI)

• Suzuki Yoshio

  Japan Synchrotron Radiation Research Institute (JASRI)

• Kobayashi Masakazu

  Department of Mechanical Engineering, Toyohashi University of Technology

抄録

Fatigue crack propagation behavior in a 7075-type Al alloy (Al-5.6%Zn-2.5%Mg-1.6%Cu) was investigated by applying Diffraction-Amalgamated Grain Boundary Tracking (DAGT), which provides grain morphologies and crystallographic orientations in three dimensions (3D). 3D crack morphologies at different propagation stages in the bulk of the sample were successfully obtained using synchrotron radiation X-ray microtomography (SRCT) technique. The apparent crack growth rate, da/dN, which varies significantly along a crack front line, was calculated. There are rapid acceleration and deceleration regions of da/dN due to the interaction with grain boundary (GB) and crack closure segments. Typical crack morphology under the influence of Mode II (in-plane shear) and Mode III (out-of-plane shear), such as crack deflection and twist, is detected by the observation of 2D tomographic slice image. A detailed direct assessment of microstructure-crack interaction behaviors has been achieved by applying the DAGT technique.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 56 (3), 424-428, 2015

  公益社団法人 日本金属学会

キーワード

• fatigue crack
• synchrotron radiation
• X-ray diffraction
• grain boundary tracking
• grain orientation
• aluminum

詳細情報

• CRID: 1390001204253288064
• NII論文ID: 130004825263
• NII論文ID: 120006024209
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.m2014340
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 026220690
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026220690
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/56/3/56_M2014340/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
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  • KAKEN
• 抄録ライセンスフラグ: 使用不可