アルマイト処理を施したアルミニウム合金Ａ２０１４‐Ｔ６の疲労強度特性

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タイトル別名
  • Characteristics of Fatigue Strength on Anodized 2014-T6 Aluminum Alloy.
  • アルマイト ショリ オ ホドコシタ アルミニウム ゴウキン A2014 T6 ノ ヒロウ キョウド トクセイ

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説明

In order to investigate the effect of anodized film on fatigue strength of aluminum alloy, A2014-T6, repeated tensile fatigue test was conducted in laboratory air under the stress ratio, R, of 0.01 using smooth specimen with anodized film thickness of 3μm. Fatigue strength of anodized specimen tested under R=0.01 decreased by 18∼20% as compared with that of the untreated one, even though the anodized film did not affect the fatigue behavior under the rotating-bending fatigue test of R=-1. The anodized film is fractured at an early stage of repeated tensile fatigue process, because it is too brittle to accommodate the substrate metal. Many cracks are induced to initiate at the substrate by flaws of the anodized film. It was pointed out through the study that the fatigue strength of anodized aluminum alloy is controlled by the crack initiation behavior in the substrate induced by the rupture of the anodized film, which is related to the deformation of substrate metal during fatigue process.

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