Laser ultrasonic absorption measurement in fatigue-damaged materials.
Changes in the materials microstructure caused by fatigue processes affect the ultrasonic absorption. Thus, quantitative measurement of the ultrasonic absorption should provide an indirect measure of fatigue damage. In this paper we present a study of the ultrasonic absorption in fatigue-damaged metals using the reverberation technique in combination with laser-based ultrasound. The reverberation technique allows one to measure absorption independently of scattering.
Luxenburger
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Fraunhofer Institute for Non-destructive Testing (IZFP), University, Saarbrücken, Germany. luxenburger@izfp.fhg.de
Arnold
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