Vibrothermography Technique for the Inspection of Rolled Strip Steel

The damages in the continuous casting slabs can be developed during rolling technology. Vibrothermogrphy is a promising technique that uses ultrasonic elastic waves to locally stimulate defects on solid. This technique allows for defect selective imaging using thermal waves that are generated by ultrasound waves. This paper presents finite element modeling of vibrothermography to obtain a comprehensive understanding in defect caused by rolling technology. We developed Finite element model for a subsurface defect subjected to ultrasonic waves.