Noncontact detection of surface-breaking cracks using a laser acoustic source and an electromagnetic acoustic receiver
- 18 August 1986
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 49 (7) , 374-376
- https://doi.org/10.1063/1.97591
Abstract
An electromagnetic acoustic transducer (EMAT) is used to detect laser generated surface acoustic transients. The surface acoustic waves are broadband and can be used to detect and size surface-breaking cracks if used in conjunction with a broadband detector. We describe a broadband EMAT and demonstrate first that it can be used to locate artificial surface-breaking defects in both aluminum and steel. A second study reveals that it can also be used for the detection of real surface-breaking cracks, even on rusty steel surfaces.Keywords
This publication has 4 references indexed in Scilit:
- Polarized shear waves using laser line sources and electromagnetic acoustic transducer detectionApplied Physics Letters, 1985
- Elastic waveforms using laser generation and electromagnetic acoustic transducer detectionJournal of Applied Physics, 1985
- Electromagnetic acoustic transducers as wideband velocity sensorsApplied Physics Letters, 1985
- Laser generation as a standard acoustic source in metalsApplied Physics Letters, 1981