Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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The Effects of the Difference of Ultrasonic Damped Rate on the Judgment of Defects

초음파 감쇠율의 차가 결함판정에 주는 영향

  • 남궁재관 (서울산업대학교 기계설계자동화공학부)
  • Published : 2005.08.01
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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.

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References

  1. Song, S. J., 1999, 'Nondestructive Flaw Classification by Pattern Recognition Approach,' J. of KSNT, Vol. 19, No. 5, pp. 378-391
  2. Park, M. H., 1999, 'Ultrasonic Flaw Sizing Techniques,' J. of KSNT, Vol. 19, No. 6, pp. 448-455
  3. Park, I. K., Park, U. S., Kim, H. M., Park, Y. W., Kang, S. C., Choi, Y. H., and Lee, J. H., 2001, 'Models of Reliability Assessment of Ultrasonic Nondestructive Inspection,' J. of KSNT, Vol. 21, No. 6, pp. 607-611
  4. Song, S. J. and Schmerr, L. W., 1992, 'Ultrasonic Flaw Classification in Weldments Using Probabilistic Neural Networks,' J. of Non-destructive Evaluation, Vol. 11, pp. 69-77
  5. Satio, S., 1993, 'Recent Trend of Medical Ultrasound Diagnostic Equipment,' J. of JSNDI, Vol. 42, No. 10, pp. 551-557
  6. Park, U. S., Park, I. K., and Kim, C. S., 2001, 'A study on the Evaluation of Material Degradation for 2.25Cr-1Mo Steel by Ultrasonic Measurements,' Trans. of KSMTE, Vol. 10, No. 3, pp. 61-67
  7. Lee, M. H., 2003, 'Experimental Verification on the Stability and Sound Pressure Transmission Coefficient of Surface SH-Wave,' Trans. of KSMTE, Vol. 12, No. 2, pp. 23-30
  8. Namkoong, C. K., 2003, 'An Experimental Study on Detection of Defects in Weldzone,' Trans. of KSMTE, Vol. 12, No, 6, pp. 56-63