1130 時間強度によるアルミ合金の高温疲労限度線図 : その2 : 種々のアルミ合金への適用結果(OS11-7 材料の疲労挙動と損傷評価-疲労損傷・寿命予測-)

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  • 1130 Fatigue Strength Diagram of Aluminum Alloys at High Temperature : Part 2 : Application to Various Aluminum Alloys

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A fatigue strength diagram, applied to the estimation of fatigue strength under mean stress or residual stress, is not obvious in case of aluminum alloys because they do not have endurance limit-especially at high temperature. Thus, we make up the generalized fatigue strength diagram at N cycles of aluminum alloy at high temperature, using the strength at N cycles instead of the endurance limit, and divide the straight line by fracture feature; plastic deformation and creep. In this study, we apply this fatigue strength diagram at N cycles to some aluminum alloys. As the results, we clarify the validity of this diagram. And, this diagram shows a possibility of proper fatigue design of aluminum alloys compared to conventional fatigue strength diagrams.

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