Abstract:Ultrasonic nonlinearity measurements have been suggested as an effective tool for the early detection of fatigue damage in metallic structures. However, the correlation between ultrasonic nonlinearity and material damage induced by fatigue or plastic deformation has been observed to be non-monotonic by several researchers including by our group. To clarify the correlation between microstructure and ultrasonic nonlinearity, the nonlinear ultrasonic behavior of polycrystalline copper is observed at multiple stag… Show more
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