Abstract: A hybrid, noncontact laser-EMAT ultrasonic system, using a pulsed laser for ultrasound generation and an EMAT (electromagnetic acousti c transducer) for ultrasound detection, is developed and studied on NDT of crack in materials. Instead of using longitudinal diffraction wave i n the conventional TOFD method, the LTS mode-converted wave scattered from the crack tip is recommended to be applied in the laser-EMAT TOFD mea surement. A modified time-of-flight (TOFD) method based on laser-EMAT ultraso...
英字タイトル:
Laser-EMAT ultrasonic testing of cracks with TOFD method