Attenuation of laser generated ultrasound in steel at high temperatures; comparison of theory and experimental measurements

Kube, Christopher M.

doi:10.1016/j.ultras.2016.05.009

Cited by 21 publications

(6 citation statements)

References 18 publications

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“…These findings contrast slightly from those of another researcher, who attributed attenuation variations to differences in material grain structure or grain size [ 47 ]. They do, however, agree with the findings of another study, which found a consistent increase in attenuation with higher temperatures using a different approach [ 48 ].…”

Section: Resultssupporting

confidence: 90%

“…The data demonstrated that when the temperature grew, so did the decibel level. Interestingly, as shown in Figure 6, the three experiments conducted in this study consistently indicated an increase in decibels beginning at 36 dB at 30 • C and progressing to 52.9 dB at 250 • C. however, agree with the findings of another study, which found a consistent increase in attenuation with higher temperatures using a different approach [48].…”

Section: Velocity Wall Echosupporting

confidence: 91%

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Ultrasonic Velocity and Attenuation of Low-Carbon Steel at High Temperatures

Tai,

Sultan,

Łukaszewicz

et al. 2023

Materials

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On-stream inspections are the most appropriate method for routine inspections during plant operation without undergoing production downtime. Ultrasonic inspection, one of the on-stream inspection methods, faces challenges when performed at high temperatures exceeding the recommended 52 °C. This study aims to determine the ultrasonic velocity and attenuation with known material grade, thickness, and temperatures by comparing theoretical calculation and experimentation, with temperatures ranging between 30 °C to 250 °C on low-carbon steel, covering most petrochemical equipment material and working conditions. The aim of the theoretical analysis was to obtain Young’s modulus, Poisson’s ratio, and longitudinal velocity at different temperatures. The experiments validated the theoretical results of ultrasonic change due to temperature increase. It was found that the difference between the experiments and theoretical calculation is 3% at maximum. The experimental data of velocity and decibel change from the temperature range provide a reference for the future when dealing with unknown materials information on site that requires a quick corrosion status determination.

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Section: Resultssupporting

confidence: 90%

Section: Velocity Wall Echosupporting

confidence: 91%

Ultrasonic Velocity and Attenuation of Low-Carbon Steel at High Temperatures

Tai,

Sultan,

Łukaszewicz

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…These findings contrast slightly from those of another researcher, who attributed attenuation variations to differences in material grain structure or grain size [42]. They do, however, agree with the findings of another study, which found a consistent rise in attenuation with higher temperatures using a different approach [43].…”

Section: Resultssupporting

confidence: 69%

Ultrasonic Velocity and Attenuation of Low Carbon Steel at High Temperatures

Tai,

Sultan,

Łukaszewicz

et al. 2023

Preprint

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On-stream inspections are the most appropriate method for routine inspections during plant operation without going through production downtime. Ultrasonic inspection, one of the on-stream inspection methods, faces challenges when performed at high temperatures exceeding the recommended 52°C. This study aims to determine the ultrasonic velocity and attenuation with the known material grade, thickness, and temperatures by comparing theory calculation versus experiment with temperatures ranging between 30°C to 250°C on low carbon steel covering most petrochemical equipment material and working conditions. The theoretical analysis was to obtain Young's modulus, Poisson's ratio, and longitudinal velocity at different temperatures. The experiments validated the predicted results of ultrasonic change due to temperature increase and showed a maximum error of 3%. The experimental data of velocity and decibel change from the temperature range provide a reference for the future when dealing with unknown materials information on site that require a quick corrosion status determination.

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“…The attenuation coefficient is sensitive to the microstructure of a material, and has been widely used in the nondestructive evaluation of material properties such as hardness, grain size, porosity and fatigue [1][2][3]. To our knowledge, the attenuation coefficient of shear waves may be much larger than that of longitudinal waves at the same driving frequency [4], and may therefore offer additional advantages over longitudinal wave attenuation for characterizing slight changes in the microstructure.…”

Section: Introductionmentioning

confidence: 99%

Measurement of shear wave attenuation coefficient using a contact pulse-echo method with consideration of partial reflection effects

Zhang

Liu

et al. 2019

Meas. Sci. Technol.

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Accurate measurements of the ultrasonic shear wave attenuation coefficient are essential for the quantitative nondestructive evaluation of the microstructure of a material. This work provides an experimental technique for measuring this coefficient using a contact method. The first and second pulse-echo shear wave signals are measured and are used to calculate the frequency-dependent attenuation coefficient; in this process, the diffraction and the diffractionaffected partial reflection coefficient are corrected to improve the accuracy of measurement. The diffraction coefficient is calculated from measurements of the shear wave velocity, and the partial reflection coefficient is determined experimentally by using another transducer on the opposite side and taking into account wave diffraction effects. The shear wave attenuation coefficient is determined for samples of different thicknesses, and these results show good agreement over a broadband frequency, thus validating the proposed method. The advantage of discriminating the porosity of additive manufacturing materials using shear wave attenuation is demonstrated, and the practical benefits of accurately measuring the shear wave attenuation coefficient using the proposed method are also discussed.

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Attenuation of laser generated ultrasound in steel at high temperatures; comparison of theory and experimental measurements

Cited by 21 publications

References 18 publications

Ultrasonic Velocity and Attenuation of Low-Carbon Steel at High Temperatures

Ultrasonic Velocity and Attenuation of Low-Carbon Steel at High Temperatures

Ultrasonic Velocity and Attenuation of Low Carbon Steel at High Temperatures

Measurement of shear wave attenuation coefficient using a contact pulse-echo method with consideration of partial reflection effects

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