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- Title
Nonlinear Photoacoustic Response on Mechanical Stresses in the Vicinity of a Hole in a D16 Aluminum-Alloy Plate.
- Authors
Glazov, A. L.; Morozov, N. F.; Muratikov, K. L.
- Abstract
Characteristics of a photoacoustic signal depending on mechanical stresses in the vicinity of a hole in a D16 aluminum-alloy plate have been analyzed. A new nonlinear photoacoustic effect was found that consists in the occurrence of a nonlinear component in the photoacoustic signal depending on mechanical stresses in the vicinity of a hole. This dependence is detected in the signal on the main modulation frequency of laser radiation. We have proposed a theoretical description of the detected effect of thermoelastic generation of ultrasound in stressed metals based on taking into account the thermal impact of laser radiation on their electron subsystem.
- Subjects
LASER beams; PHOTOACOUSTIC spectroscopy; PHOTOACOUSTIC effect; ALUMINUM alloys; METALS; ELECTRONS; THERMOELASTICITY
- Publication
Technical Physics Letters, 2020, Vol 46, Issue 2, p171
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/S1063785020020200