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ASM Handbook

Nondestructive Evaluation of Materials

Edited by
Aquil Ahmad
Aquil Ahmad
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Leonard J. Bond
Leonard J. Bond
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ASM International
Volume
17
ISBN electronic:
978-1-62708-190-0
Publication date:
2018
Book Chapter

Laser-Ultrasonics—Principles and Industrial Applications

By
Jean-Pierre Monchalin
Jean-Pierre Monchalin
National Research Council of Canada
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Published:
2018
Page range:
238 - 258
Publication history
August 21, 2018

Abstract

Laser-ultrasonics is a particular implementation of ultrasonic nondestructive inspection in which ultrasound is generated and detected by lasers. This article discusses the various mechanisms that ensure ultrasound generation and explains the possibility to get the equivalent of phase-array by numerical processing of an array of previously acquired laser-ultrasonic signals. The article describes the ultrasound generation by thermoelastic mechanism and ablation or vaporization. It illustrates the principle of optical detection of ultrasound with confocal Fabry-Perot interferometer and photorefractive two-wave mixing interferometer. The article concludes with information on the industrial applications of laser-ultrasonics, including thickness measurement, flaw detection, and material characterization.

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Jean-Pierre Monchalin, 2018. "Laser-Ultrasonics—Principles and Industrial Applications", Nondestructive Evaluation of Materials, Aquil Ahmad, Leonard J. Bond

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