Experimental study of functionally graded materials of Fe/Al2O3 compound coatings on the steel substrate by using the laser ultrasound method

Sun, Kaihua; Yuan, Lei; Shen, Zhonghua; Ni, Xiaowu

doi:10.1117/12.900756

Cited by 1 publication

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“…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%

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

et al. 2013

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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.

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