The Effect of Ultrasonic Excitation Duration on the Quantitative Estimation of Defect Depth Using Sonic Infrared Imaging

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Abstract
Sonic Infrared (SIR) Imaging is a novel hybrid NDE method that has seen rapid acceptance in the industry. SIR uses ultrasonic-generated heat as a defect detection mechanism. The ultrasonic excitation is a second or a fraction-of-a-second pulse in the 15 to 40 KHz range generated by a piezoelectric transducer which produces localized heating at the defect that will be captured by a