Crack Propagation behavior Under Low-Cycle Corrosion Fatigue of A7003-T6 Aluminum Alloy

• SHIOZAWA Kazuaki

• ASAMOTO Toru

• MIYAO Kazyu

抄録

Crack propagation behavior has been observed in A7003- T6 aluminum alloy under low cyclic loading with hold time over the frequency range 4×10^-31 Hz in 3.0% saline solution. From the experimental results, the effect of cyclic frequency on crack propagation rates was found to be exemplified by two different regimes. One has a positive dependency on the frequency below a critical frequency, f_crit, at which point maximum environmental attack occurs in terms of da/dN, and the other is negative above f_crit. The behavior of crack propagation below f_crit was explained by the concept of stress assisted dissolution which tends to inhibit mechanical failure by crack blunting and microbranching. The number and depth of secondary cracks occurring under the fracture surface were measured by metallographic examination, and the actual crack tip stress intensity factor was estimated.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 32 (4), 572-580, 1989

  一般社団法人 日本機械学会

キーワード

• Corrosion Fatigue
• Crack Propagation Rate
• Aluminum Alloy
• Secondary Crack
• Frequency
• Stress Waveform
• Blunting
• Branching

詳細情報

• CRID: 1390282680408740224
• NII論文ID: 130006919471
• NII論文ID: 110002348331
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.32.4_572
• HANDLE: 10110/2283
• ISSN: 09148809
• Web Site: https://toyama.repo.nii.ac.jp/records/3326
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/32/4/32_4_572/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可