Application of ultrasonic Rayleigh waves to thickness measurement of metallic coatings

Lakestani, F.; Coste, Jean-François; Denis, R.

doi:10.1016/0963-8695(95)00010-u

Cited by 37 publications

(19 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ultrasonic surface acoustic waves (SAWs) have been widely used in the field of nondestructive evaluation (NDE) for determining the elastic modulus of many kinds of materials, such as thin films, functional-graded materials (FGMs), and surface materials [8][9][10]. The propagation velocity of the SAW is particularly sensitive to the elastic properties of all the materials layers it probes.…”

Section: Introductionmentioning

confidence: 99%

“…The propagation velocity of the SAW is particularly sensitive to the elastic properties of all the materials layers it probes. A SAW is dispersed and its velocity varies with frequency in a complex inhomogeneous structure, such as an FGM, a multilayer system, and so on [8][9][10][11][12]. Through determining the velocity at different frequencies, a dispersion curve of SAW can be obtained to evaluate the elastic properties of dental enamel and determine the state of the enamel demineralization.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and numerical studies for nondestructive evaluation of human enamel using laser ultrasonic technique

et al. 2013

View full text Add to dashboard Cite

In this paper, a nondestructive laser ultrasonic technique is used to generate and detect broadband surface acoustic waves (SAWs) on human teeth with different demineralization treatment. A scanning laser line-source technique is used to generate a series of SAW signals for obtaining the dispersion spectrum through a two-dimensional fast Fourier translation method. The experimental dispersion curves of SAWs are studied for evaluating the elastic properties of the sound tooth and carious tooth. The propagation and dispersion of SAWs in human teeth are also been studied using the finite element method. Results from numerical simulation and experiment are compared and discussed, and the elastic properties of teeth with different conditions are evaluated by combining the simulation and experimental results.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies for nondestructive evaluation of human enamel using laser ultrasonic technique

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Ultrasonic evaluation of the compressive residual stress in the layer directly beneath the surface is complicated by the adverse effects of shot peening, such as surface roughness and cold work. In recent years, there have been numerous efforts to separate the contribution of surface roughness from those of near-surface material variations, such as the primary residual stress effect, and the secondary cold work effect in the form of texture and increased dislocation density [1][2][3][4][5][6] . We found that, generally, the measured dispersion of the Surface Acoustic Wave (SAW) arises from three different sources.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress Assessment in Surface-Treated Metals by Laser-Ultrasonic Spectroscopy

Ruíz¹,

Nagy²

2004

AIP Conference Proceedings

View full text Add to dashboard Cite

This paper presents experimental data obtained on shot-peened aluminum 2024-T351 samples, which indicate that the dispersion of the surface wave is affected by surface roughness, compressive residual stress, and cold work. Although the surface roughness induced component is often the dominant part in the overall dispersion of the SAW, the experimental data indicate that it is feasible to observe a substantial and highly characteristic change in the velocity of the SAW when the specimen is heat treated at different annealing temperatures. The part of the dispersion, which changes during annealing via thermal relaxation, is due to near-surface residual stresses and the decay of texture, although at high frequencies non-uniform grain coarsening could also play a significant role.

show abstract

“…To ensure the performance of the thermal sprayed coatings for corrosion and damage protection, non-destructive testing can be applied for coating quality evaluation on requests such as electrochemical method, guided wave, acoustic, ultrasonic, and microwave techniques [19][20][21][22][23][24][25][26]. The application of these techniques requires accessing the structures which may not be the case for some off-shore or marine structures.…”

Section: Introductionmentioning

confidence: 99%

Pitted Corrosion Detection of Thermal Sprayed Metallic Coatings Using Fiber Bragg Grating Sensors

et al. 2017

View full text Add to dashboard Cite

Metallic coatings using thermal spraying techniques are widely applied to structural steels to protect infrastructure against corrosion and improve durability of the associated structures for longer service life. The thermal sprayed metallic coatings consisting of various metals, although have higher corrosion resistance, will still corrode in a long run and may also subject to corrosion induced damages such as cracks. Corrosion and the induced damages on the metallic coatings will reduce the effectiveness of the coatings for protection of the structures. Timely repair on these damaged metallic coatings will significantly improve the reliability of protected structures again deterioration. In this paper, an inline detection system for corrosion and crack detection was developed using fiber Bragg (FBG) grating sensors. Experimental results from laboratory accelerated corrosion tests showed that the developed sensing system can quantitatively detect corrosion rate of the coating, corrosion propagations, and cracks initialized in the metallic coating in real time. The developed system can be used for real-time corrosion detection of coated metal structures in field.

show abstract

Application of ultrasonic Rayleigh waves to thickness measurement of metallic coatings

Cited by 37 publications

References 5 publications

Experimental and numerical studies for nondestructive evaluation of human enamel using laser ultrasonic technique

Experimental and numerical studies for nondestructive evaluation of human enamel using laser ultrasonic technique

Residual Stress Assessment in Surface-Treated Metals by Laser-Ultrasonic Spectroscopy

Pitted Corrosion Detection of Thermal Sprayed Metallic Coatings Using Fiber Bragg Grating Sensors

Contact Info

Product

Resources

About