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The Effects of the Difference of Ultrasonic Damped Rate on the Judgment of Defects  

Namkoong Chai-Kwan (서울산업대학교 기계설계자동화공학부)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.14, no.4, 2005 , pp. 1-6 More about this Journal
Abstract
In this study, on automatic ultrasonic testing system is used to detect defects of flawtest specimen. We study the effects of the difference of ultrasonic damped rate of the different materials on the judgment of defects. The results indicate that the difference of sensitivity compensating quantity is 2dB, and the judgment is correct over $90\%$ when a specimen is judged as a defect when it exceeds third grade.
Keywords
Defects; Damped Rate; Sensitivity; Compensating Quantity; Ultrasonic; Probe; Flaw length;
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