Nondestructive material characterization by laser-excited longitudinal and shear acoustic waves

Alexander A. Karabutov; Natalia B. Podymova

doi:10.1117/12.234228

1 March 1996 Nondestructive material characterization by laser-excited longitudinal and shear acoustic waves

Alexander A. Karabutov, Natalia B. Podymova

Proceedings Volume 2713, Fifth International Conference on Industrial Lasers and Laser Applications '95; (1996) https://doi.org/10.1117/12.234228
Event: Fifth International Conference on Industrial Laser and Laser Applications '95, 1995, Shatura, Moscow, Russian Federation

Abstract

Wideband pulsed acoustic spectroscopy over a frequency range 1 - 100 MHz with laser excitation of ultrasound was carried out for metals, ceramics and glass-fiber-reinforced composites. Sizes of grains in metals and ceramics were evaluated and the scatterers size distribution can be estimated. Quality of treatment of metal samples surfaces was evaluated using frequency spectra of attenuation of ultrasound. Fatigue changes in composites arise after loading transform ultrasound attenuation spectra. Measurement of attenuation of shear acoustic waves in metals was carried out using transformation of longitudinal waves at sample surface. The attenuation of shear waves was reasonably stronger than the attenuation of longitudinal waves in the short wavelength region.

Citation Download Citation

Alexander A. Karabutov and Natalia B. Podymova "Nondestructive material characterization by laser-excited longitudinal and shear acoustic waves", Proc. SPIE 2713, Fifth International Conference on Industrial Lasers and Laser Applications '95, (1 March 1996); https://doi.org/10.1117/12.234228

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