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- W2092489834 abstract "열화 정도를 예측하기 위한 비파괴기법으로 초음파기법이 널리 적용되고 있다. 초음파 속도와 감쇠 특성은 일반적으로 금속재료의 물성 변화에 따라 변화하기 때문에 초음파 속도와 감쇠 특성을 이용하여 금속재료의 열화 정도를 간접적으로 예측할 수 있다. 따라서, 본 연구에서는 반복하중으로 인하여 피로파괴 발생 가능성이 높은 볼트, 리벳 접합의 구조용재 및 선박 차량에 사용되고 있는 Al6061-T6을 피로수명의 0%, 55%, 70%, 85%인 시험편을 제작하였고, 가공된 시험편의 감쇠 특성을 이용하여 측정된 열화 이미지로 Al6061-T6의 건전부와 열화부를 판단하였으며, 건전부와 열화부의 감쇠 특성 차이를 계산하여 Al6061-T6의 열화 진행 정도를 평가하였다. Ultrasonic methods are widely used to degradation assessment. Remaining-life cycle of metal can be estimated by ultrasonic parameters because ultrasonic velocity and attenuation are affected by change of material properties with accumulated fatigue in the metal. Therefore, in this study, we will estimate overall change of material properties by 2D C-scan image. Fatigued aluminum alloy 6061-T6 samples from 0 to 85% were prepared for evaluating fatigue life cycle. Also, degraded image of materials using attenuation is proposed to estimate degree of material degradation for determining degraded area of fatigued samples. Finally, we will predicts process pf degradation with measured attenuation of fatigued aluminum alloy 6061-T6 samples." @default.
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- W2092489834 date "2013-02-28" @default.
- W2092489834 modified "2023-10-04" @default.
- W2092489834 title "Degradation Assessment of Aluminum Alloy 6061-T6 Using Ultrasonic Attenuation Measurements" @default.
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- W2092489834 doi "https://doi.org/10.7779/jksnt.2013.33.1.20" @default.
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