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Authors: Juyoung Ryu (Hanyang University) , Dong-Gi Song (Hanyang University) , Sungho Choi (Hanyang University) , Kyung-Young Jhang (Hanyang University)
The measurement of the acoustic nonlinearity parameter of stainless steel has been investigated using the acoustoelastic effect in which the elastic wave velocity changes depending on stress conditions. The stress-dependent coefficient, which is an index quantitatively representing the acoustoelastic effect, was measured and was used to calculate the acoustic nonlinearity parameter. In experiments, stainless steel 304 and stainless steel 316L were used, and the stress-dependent coefficients of the materials were measured from the velocity changes of longitudinal and transverse waves under various compressive stress conditions. From the measured stress-dependent coefficients, the second and third-order elastic constants were calculated, and then the calculated values were converted to the acoustic nonlinearity parameter. The acoustic nonlinearity parameters measured from the acoustoelastic effect approximated the reference values. Consequently, it would be effective to use the acoustoelastic effect when measuring acoustic nonlinearity parameter of stainless steel.
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How to Cite: Ryu, J. . , Song, D. . , Choi, S. . & Jhang, K. . (2019) “Measurement of acoustic nonlinearity parameter in stainless steel using acoustoelastic effect”, Review of Progress in Quantitative Nondestructive Evaluation.(0).