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<p>This study investigated the effects of anodized film and its thickness on the fatigue strength of aluminum alloys with different anodized film thicknesses, and established fatigue-design guidelines for anodized aluminum alloys. As a result, under the conditions of stress ratio <i>R</i> = − 1 and an axial load fatigue test, cracking of the anodized film is a factor to decrease the fatigue strength. However, when no cracking occurred, the formation of the anodized film did not affect fatigue strength. Moreover, it is possible to safely predict the fatigue life of anodized aluminum alloy with cracking of the anodized film based on stress by arranging the cracking of anodized film as a defect area.</p>

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Fatigue Fracture Mechanism of Anodized AA6061-T6 and Fatigue-Design Guideline Proposal Considering Film Thickness

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Miu Hayashi,
  • Takeshi Ando,
  • Yuki Ogawa,
  • Hiroyuki Akebono,
  • Atsushi Sugeta

摘要

This study investigated the effects of anodized film and its thickness on the fatigue strength of aluminum alloys with different anodized film thicknesses, and established fatigue-design guidelines for anodized aluminum alloys. As a result, under the conditions of stress ratio R = − 1 and an axial load fatigue test, cracking of the anodized film is a factor to decrease the fatigue strength. However, when no cracking occurred, the formation of the anodized film did not affect fatigue strength. Moreover, it is possible to safely predict the fatigue life of anodized aluminum alloy with cracking of the anodized film based on stress by arranging the cracking of anodized film as a defect area.