A Pulse Inversion-Based Nonlinear Ultrasonic Technique using a Single-Cycle Longitudinal Wave for Evaluating Localized Material Degradation in Plates

Choi, Sungho; Lee, Pureun; Jhang, Kyung-Young

doi:10.1007/s12541-019-00093-1

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…This nonlinear parameter is also known to be sensitive to microstructural features. The use of nonlinear ultrasonics was recently intensively studied for characterizing the microstructure and the material degradation [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…Reports on the correlation between grain size and nonlinear ultrasonic parameter are rare in the literature [7,22]. This is because most previous nonlinear ultrasound studies have focused mainly on evaluating material degradation, such as fatigue damage [23][24][25], creep damage [26,27], thermal aging [28][29][30], and plastic deformation [31,32], in which dominant microstructural characteristics that affect the nonlinear ultrasonic parameter are dislocation densities [33,34], precipitates [35][36][37], and phase transformations [38]. Several previous studies showed that there was a good correlation between the grain size and the nonlinear ultrasonic parameter [7,22].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Linear and Nonlinear Ultrasonic Parameters in Characterizing Grain Size and Mechanical Properties of 304L Stainless Steel

Choi

Ryu

Kim

et al. 2019

Metals

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Ultrasonic nondestructive techniques can be used to characterize grain size and to evaluate mechanical properties of metals more practically than conventional destructive optical metallography and tensile tests. Typical ultrasonic parameters that can be correlated with material properties include ultrasonic velocity, ultrasonic attenuation coefficient, and nonlinear ultrasonic parameters. In this work, the abilities of these ultrasonic parameters to characterize the grain size and the mechanical properties of 304L stainless steel were evaluated and compared. Heat-treated specimens with different grain sizes were prepared and tested, where grain size ranged from approximately 40 to 300 μm. The measurements of ultrasonic velocity and ultrasonic attenuation coefficient were based on a pulse-echo mode, and the nonlinear ultrasonic parameter was measured based on a through-transmission mode. Grain size, elastic modulus, yield strength, and hardness were measured using conventional destructive methods, and their results were correlated with the results of ultrasonic measurements. The experimental results showed that all the measured ultrasonic parameters correlated well with the average grain size and the mechanical properties of the specimens. The nonlinear ultrasonic parameter provided better sensitivity than the ultrasonic velocity and the ultrasonic attenuation coefficient, which suggests that the nonlinear ultrasonic measurement would be more effective in characterizing grain size and mechanical properties than linear ultrasonic measurements.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Linear and Nonlinear Ultrasonic Parameters in Characterizing Grain Size and Mechanical Properties of 304L Stainless Steel

Choi

Ryu

Kim

et al. 2019

Metals

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“…Currently, a piezoelectric detection method is the most widely used method to measure β, owing to its advantages of high sensitivity for the measurement of sub-nanometer-scale displacements and convenience because it utilizes general NDE equipment [18]. Dace et al [19] proposed this method for the first time where they first measured β using the through-transmission method and calibrated β to β based on the transfer function using a pulse-echo method.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Absolute Acoustic Nonlinearity Parameter Using Laser-Ultrasonic Detection

et al. 2021

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The absolute acoustic nonlinearity parameter β is defined by the displacement amplitudes of the fundamental and second-order harmonic frequency components of the ultrasonic wave propagating through the material. As β is a sensitive index for the micro-damage interior of industrial components at early stages, its measurement methods have been actively investigated. This study proposes a laser-ultrasonic detection method to measure β. This method provides (1) the β measurement in a noncontact and nondestructive manner, (2) inspection ability of different materials without complex calibration owing to direct ultrasonic displacement detection, and (3) applicability for the general milling machined surfaces of components owing to the use of a laser interferometer based on two-wave mixing in the photorefractive crystal. The performance of the proposed method is validated using copper and 6061 aluminum alloy specimens with sub-micrometer surface roughness. The experimental results demonstrated that the β values measured by the proposed method for the two specimens were consistent with those obtained by the conventional piezoelectric detection method and the range of previously published values.

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Measurement of Nonlinear Ultrasonic Parameters from Higher Harmonics

Jhang

Choi

Kim

2020

Springer Series in Measurement Science and Technology

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A Pulse Inversion-Based Nonlinear Ultrasonic Technique using a Single-Cycle Longitudinal Wave for Evaluating Localized Material Degradation in Plates

Cited by 9 publications

References 26 publications

Comparison of Linear and Nonlinear Ultrasonic Parameters in Characterizing Grain Size and Mechanical Properties of 304L Stainless Steel

Comparison of Linear and Nonlinear Ultrasonic Parameters in Characterizing Grain Size and Mechanical Properties of 304L Stainless Steel

Measurement of Absolute Acoustic Nonlinearity Parameter Using Laser-Ultrasonic Detection

Measurement of Nonlinear Ultrasonic Parameters from Higher Harmonics

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