Non destructive testing thickness measurement by laser ultrasound under high temperature

Li, Suyuan; Wang, Haitao; Guo, Ruipeng; Zhao, Jiyuan; Zheng, Kai; Xu, Jun; Chen, Shuai; Jiang, Yi

doi:10.1016/j.ijleo.2018.07.126

Cited by 20 publications

(6 citation statements)

References 8 publications

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“…Note that laser ultrasound inspection under some extreme conditions has been explored by other researchers using the pump-probe techniques as well. Their findings could be useful if the G-UPI were to be adopted under similar conditions, for example, under the influence of high pressure (stress) [323,324], temperature [158,159], and radiation [160,161].…”

Section: Inspection Under Difficult Conditionsmentioning

confidence: 98%

“…for inspection of specimens immersed in transparent liquids [71] or specimens located in a hostile environment (e.g. extreme temperatures [158,159], radioactivity [160,161], large standoff distance [112], etc). Using a pulsed laser for generation has many interesting potentials; for example, the laser can be split into multiple beams for simultaneous multi-ROI inspection [9,162] for large structures, significantly reducing downtime for structural inspection.…”

Section: Transducer Selectionmentioning

confidence: 99%

“…Other potentially useful non-contact sensors which have not yet been reported for G-UPI application include the two-wave mixing interferometer [88, 89,158], Sagnac interferometer [192,193], and the so-called 'optical microphone' [194][195][196][197]. Some novel optical sensors are being developed for full-field wavefield measurement instead of scanning measurement.…”

Section: Transducer Selectionmentioning

confidence: 99%

See 2 more Smart Citations

Guided ultrasonic waves propagation imaging: a review

Chia¹,

Lee²,

Harmin³

et al. 2023

Meas. Sci. Technol.

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This article presents a comprehensive review of the laser-based guided ultrasonic waves propagation imaging (G-UPI) system and respective signal/data processing methods related to the nondestructive testing and evaluation of thin-walled structures. The primary goal of this study is to review and recognize various processing methods, explain the working principles of the most influential methods, and highlight outstanding capabilities. In addition, the suitability of the methods for multiple types of damage and defect in various materials and structures are presented. At the same time, success stories of difficult-to-inspect cases are highlighted. Its secondary goal is to compare and discuss the merits and demerits of the laser-scanning part of the system for ultrasound generation and acquisition to provide a guideline for scanning scheme or hardware selection. Finally, the potential challenges and prospects of the G-UPI are discussed. It is expected that this review would serve as an entrance key for newcomers and a reference point for researchers to explore the opportunities for further improvement in the laser ultrasound-based evaluation of critical engineering structures.

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Section: Inspection Under Difficult Conditionsmentioning

confidence: 98%

Section: Transducer Selectionmentioning

confidence: 99%

Section: Transducer Selectionmentioning

confidence: 99%

See 1 more Smart Citation

Guided ultrasonic waves propagation imaging: a review

Chia¹,

Lee²,

Harmin³

et al. 2023

Meas. Sci. Technol.

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show abstract

“…To solve the above problems, the laser ultrasonic method to detect the contact state of the bolt joint surface is used in this paper. The advantages of laser ultrasound are non-contact, wide frequency bandwidth, fast scanning speed, and strong anti-interference ability [5] . The contact state of bolted aluminum alloy plates with different working conditions is studied in this paper, which provides a new method for detecting the contact state of bonded surfaces by laser ultrasonic.…”

Section: Introductionmentioning

confidence: 99%

Study on the method for detecting contact state of bolted joint surface based on laser ultrasonic

Hao

Tao²,

2023

J. Phys.: Conf. Ser.

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The contact state of the bolt joint surface has an important influence on the contact stiffness, damping, and other properties of the equipment. To obtain the contact state of the bolt joint surface, the method to detect the contact state of the bolt joint surface based on laser ultrasonic technology is proposed in this paper. The reflectivity under different working conditions is obtained by the reflection amplitude of the longitudinal wave before and after bolt tightening. The relationship between reflectivity and bolt torque is studied. The results show methods proposed in this paper can effectively detect the contact state of the bolt joint surface, and it provides a basis for the study of the mechanical properties of the contact surface.

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“…Huang et al [18] obtained the elastic constants of La0.6Sr0.4MnO3 (LSMO) thin lms in the LSMO / MgO system by nite element analysis, and the numerical results are in good agreement with the real values. Li et al [19] discussed the in uence of high temperature on longitudinal waves based on LU theory. The thickness of low carbon steel was calculated by using the collected longitudinal wave information, which provided a good basis for online thickness detection at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Mechanical Constants of TC4 alloy Detected by Laser Ultrasonic

Chen

Zhang

et al. 2023

Preprint

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Mechanical constants are the fundamental parameters for characterizing the mechanical properties of materials. Laser ultrasonic is a new non-destructive testing method characterized by long-range and non-contact. It is particularly suitable for detecting the mechanical properties of materials in harsh environments. TC4 alloy is one of the most important alloys for the production of engine blades, which is working at a high temperature of about 300–500℃. In this paper, the mechanical constants (elastic modulus and Poisson's ratio) of TC4 alloy at high temperatures are studied based on the finite element method. The mechanical constants are determined by their relation to the velocity of the ultrasonic wave. The finite element model of the laser-induced multi-mode wave at room temperature is established. Compare with the experimental results, the Rayleigh wave velocity error is 1.70%, and the longitudinal wave velocity error is 1.18%. The numerical results agree well with the experimental results, which confirms the correctness of the model. On this basis, further inversion of elastic modulus and Poisson's ratio of TC4 alloy at high temperature. It is found that elastic modulus and Poisson's ratio of TC4 alloy have a quadratic relationship with temperature. The mechanical constants at high temperatures are predicted, and the relative error is less than 4%. In this paper, the numerical results are in good agreement with the theoretical values, which verifies the validity and reliability of the model. It provides a reference for the further use of laser ultrasonic to determine the mechanical properties of materials at high temperatures.

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Non destructive testing thickness measurement by laser ultrasound under high temperature

Cited by 20 publications

References 8 publications

Guided ultrasonic waves propagation imaging: a review

Guided ultrasonic waves propagation imaging: a review

Study on the method for detecting contact state of bolted joint surface based on laser ultrasonic

High Temperature Mechanical Constants of TC4 alloy Detected by Laser Ultrasonic

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