Inspection of cracks with focused angle beam laser ultrasonic wave
Sign Up to like & getrecommendations! Published in 2019 at "Applied Acoustics"
DOI: 10.1016/j.apacoust.2018.09.012
Abstract: Abstract In this work, in order to improve the detecting ability of laser ultrasonic testing technique for inner cracks in metals, an arc-line-focused laser source is proposed to generate focused angle-beam bulk waves in thermoelastic… read more here.
Keywords: laser ultrasonic; angle beam; focused angle; arc line ... See more keywords
Texture in steel plates revealed by laser ultrasonic surface acoustic waves velocity dispersion analysis
Sign Up to like & getrecommendations! Published in 2017 at "Ultrasonics"
DOI: 10.1016/j.ultras.2017.02.016
Abstract: HIGHLIGHTSA laser‐ultrasonic approach for texture measurement was proposed.A clear SAW angular dependence which was strongly connected with texture was found.SAW velocity angular dispersion within single grains was numerically determined.SAW velocities and variation in {1 1… read more here.
Keywords: velocity; saw velocities; dispersion; laser ultrasonic ... See more keywords
Quantitative Imaging Detection of Additive Manufactured Parts Using Laser Ultrasonic Testing
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.3030307
Abstract: Selective laser melting (SLM) is an important method of additive manufacturing, however it has some disadvantages such as poor surface qualities of the formed parts and the appearances of small surface defects. In this article,… read more here.
Keywords: laser ultrasonic; quantitative imaging; surface; surface defects ... See more keywords
Automatic Quantification of Subsurface Defects by Analyzing Laser Ultrasonic Signals Using Convolutional Neural Networks and Wavelet Transform
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2021.3087949
Abstract: The conventional machine learning algorithm for analyzing ultrasonic signals to detect structural defects necessarily identifies and extracts either time- or frequency-domain features manually, which has problems in reliability and effectiveness. This work proposes a novel… read more here.
Keywords: laser ultrasonic; laser; wavelet transform; ultrasonic signals ... See more keywords
Laser Ultrasonic Nondestructive Testing Based on Nonlinear Ultrasonic Coefficient
Sign Up to like & getrecommendations! Published in 2020 at "Russian Journal of Nondestructive Testing"
DOI: 10.1134/s1061830920030043
Abstract: Abstract Laser ultrasonic nondestructive testing technology can effectively detect the location of cracks and other information, it is easy to realize the qualitative detection of cracks, but it is difficult to achieve quantitative detection of… read more here.
Keywords: laser ultrasonic; nonlinear ultrasonic; coefficient; nondestructive testing ... See more keywords
Applying Laser-Ultrasonic and Acoustic-Emission Methods to Nondestructive Testing at Different Stages of Deformation Formation in Friction Stir Welding
Sign Up to like & getrecommendations! Published in 2020 at "Russian Journal of Nondestructive Testing"
DOI: 10.1134/s1061830920030122
Abstract: Abstract The results of applying laser-ultrasonic and acoustic-emission nondestructive testing techniques to study the processes of deformation and fracture of friction-stir-welded joints are presented. The load-strain diagrams were obtained and the mechanical characteristics of the… read more here.
Keywords: laser ultrasonic; nondestructive testing; emission; applying laser ... See more keywords
Laser-Ultrasonic Study of Residual Stresses in Pipes Made of Austenitic Steel
Sign Up to like & getrecommendations! Published in 2019 at "Acoustical Physics"
DOI: 10.1134/s1063771019030114
Abstract: The paper discusses an acoustoelastic study of residual stresses and related structural changes in thin-walled austenitic steel pipes. A probing ultrasonic (US) beam is formed owing to the thermoelastic effect by absorption of a laser… read more here.
Keywords: austenitic steel; study residual; residual stresses; laser ultrasonic ... See more keywords
Nondestructive measurement of the grain size of laser cladding coatings using a laser ultrasonic method.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.449673
Abstract: Due to the processing characteristics of laser cladding, the beads and joints of the laser cladding coatings have different grain sizes. We used the laser ultrasonic (LU) method to measure the distribution of the grain… read more here.
Keywords: laser; laser ultrasonic; method; cladding coatings ... See more keywords
Laser ultrasonic improvement and its application in defect detection based on the composite coating method.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.454888
Abstract: Herein, we studied the increasing tendency of photoacoustic (PA) conversion efficiency of the Au/polydimethylsiloxane (PDMS) composite. The thickness of the Au layer was optimized by modeling the PA process based on the Drude-Lorentz model and… read more here.
Keywords: defect detection; detection; application defect; method ... See more keywords