Furukawa-Sky Review No.8 (April 2012)

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Effect of Experimental Humidity on Fatigue Fracture of 6XXX-series Aluminum Alloys

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  • Koji Ichitani
  • Katsumi Koyama

Fatigue tests under controlled experimental humidity were conducted to reveal the effect of hydrogen on 6XXX-series aluminum alloys. This is because under a humidified air condition hydrogen atoms are generated through a reaction between successively exposed aluminum surface and vapor water, and then the experimental condition of high pressure hydrogen gas environment can be readily simulated. In order to examine intrinsic hydrogen embrittlement behavior of 6XXX-series alloys during fatigue fracture, a ternary Al-Mg-Si alloy was subjected to the test. The fatigue life of the alloy was substantially lower under a humidified air condition than an inert dry nitrogengas condition. The effect of additive elements such as Cu, Cr and Fe on the fatigue life of the ternary alloy was examined, and it was revealed that the fatigue life of a Cu-containing alloy was not decreased under humidified air condition. This result suggests that Cu has an effect of decreasing hydrogen embrittlement sensitivity of 6XXX-series alloys.

技術論文 / Technology Articles

  1. Effect of Experimental Humidity on Fatigue Fracture of 6XXX-series Aluminum Alloys
  2. 極低温における破壊靱性に優れたアルミニウム合金溶接部材の開発(液体水素輸送・貯蔵用アルミニウム材料の研究)
    Development of Aluminum Alloy Welding Member with Superior Fracture Toughness at Cryogenic Temperature (Study of Aluminum Material for Liquid Hydrogen Transportation and Storage Vessels)
  3. 電気化学インピーダンス法による陽極酸化皮膜の耐アルカリ性評価
    Characterization for Alkaline Dissolution of Anodic Oxide Films Formed on Aluminum by EIS
  4. Evolution of Recrystallization Texture in Aluminum Alloy Sheets by Asymmetric-Warm-Rolling
  5. Effects of Cu Addition on Aging Behavior of Al-0.3%Mg-0.5%Si Alloy

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