한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제16권5호
  • /
  • Pages.8-14
  • /
  • 2008
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

용접결함 검사용 수침식초음파탐상기의 매질개선연구

A Study on Couplant Medium Improvement for Ultrasonic Inspection System with Water Immersion to Detect Weld Defects

  • 정달우 (한양대학교 대학원 기계공학과) ;
  • 최낙삼 (한양대학교 기계정보경영공학부) ;
  • 박용배 (현대기아자동차)
  • Jung, Dal-Woo (Department of Mechanical Engineering, Graduate School, Hanyang University) ;
  • Choi, Nak-Sam (Department of Mechanical Engineering, Hanyang University) ;
  • Park, Yong-Bae (Corporate Production & Development Coordination Division, Hyundai Motors)
  • 발행 : 2008.09.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

For nondestructive inspection of electron beam (EB) welding part in automotive power transmission assembly, a pulse-echo ultrasonic testing apparatus in water immersion has been applied using the ultrasonic waves with a frequency of 10MHz. However various problems have appeared during the ultrasonic inspection, which led to some significant mistakes in automatic quality evaluation of the welding parts. Experimental study showed that the state of water couplant medium containing some amount of contaminants, rusts and anti-corrosion agents had considerable influences on the reduction of ultrasonic amplitudes during wave propagation. The amplitude reduction depending on the coupling medium state could bring about some mis-diagnoses for defects in the welding parts. The results proposed that for a reliable inspection of defects in welds the state of water medium should be kept in about 15 volume fractions (vol.%) of anti-corrosion agents and in minimized contaminants.

키워드

참고문헌

  1. U.-S. Park, I.-K. Park and S.-J. Song, Nondestructive Test, Hakyeon Co. Ltd., pp.193-268, 2001
  2. A. P. Mouritz, C. Townsend and M. Z. Shah Khan, "Non-destructive Detection of Fatigue Damage in Thick Composites by Pulse-echo Ultrasonics," Composites Science and Technology, Vol.60, pp.23-32, 2000 https://doi.org/10.1016/S0266-3538(99)00094-9
  3. Z.-G. Yang and S.-G. Long, "Damage Analysis for Particle Reinforced Metal Matrix Composite by Ultrasonic Method," Transactions of Nonferrous Metals Society of China, Vol.16, pp.s652-s655, 2006 https://doi.org/10.1016/S1003-6326(06)60271-9
  4. Y.-T. Hwang, S.-K. Oh, J.-Y. Han, S.-C. Jang, S.-N. Yun, W. Yi and H.-T. Kim, "Evaluation of Flaws in Adhesively Bonded Joint using Ultrasonic Signal Analysis," Journal of KWS, Vol.22, No.2, pp.136-143, 2004
  5. I.-K. Park, C.-K. Lee, H.-M. Kim, T.e-S. Park, Y.-K. Kim, Y.-S. Cho, W.-J. Song and H.-K. Ahn, "Non-contact Ultrasonic Inspection Technology of Fillet Weldments," Journal of KWS, Vol.23, No.5, pp.37-42, 2005
  6. Y.-K. Lee and N.-Y. Koo, "A Study on the Height Measurement of the Lack of Penetration in Weld Zone by Ultrasonic Angle Beam Testing," Gyeongsang National University, Vol.2, pp.25-33, 1992
  7. N. Y. Chung and S. I. Park, "Measurement of Interfacial Crack Length by Ultrasonic Attenuation Coefficients on Adhesively Bonded Components," Transactions of KSAE, Vol.12, No.1, pp.130-137, 2004