비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제32권4호
  • /
  • Pages.388-392
  • /
  • 2012
  • /
  • 1225-7842(pISSN)
  • /
  • 2287-402X(eISSN)
한국비파괴검사학회 (The Korean Society for Nondestructive Testing)
권호 표지
DOI QR코드

DOI QR Code

Al6061 합금의 소성변형에 따른 음향비선형 특성의 완전 비접촉식 평가

Fully Non-Contact Assessment of Acoustic Nonlinearity According to Plastic Deformation in Al6061 Alloy

  • 이현 (한양대학교 자동차공학과) ;
  • 전청 (한양대학교 자동차공학과) ;
  • 김정석 (한양대학교 자동차공학과) ;
  • 장경영 (한양대학교 기계공학부)
  • 투고 : 2012.07.02
  • 심사 : 2012.08.14
  • 발행 : 2012.08.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구에서는 표면파의 음향비선형 특성 측정을 위해 선 배열 레이저 빔을 이용하여 협대역의 표면파를 발생시키고 레이저 TWM(Two-Wave Mixing) 방식으로 수신하는 완전 비접촉 측정 방법이 도입되었다. 이 기술은 알루미늄 합금의 소성변형과 음향비선형 특성과의 상관성을 조사하는데 적용되었다. 그 결과, 재료의 소성변형에 따라 음향 비선형성이 비례적으로 증가하는 것으로 나타났으며, 이는 접촉식 PZT 탐촉자 수신 방법으로 측정한 결과와 동일한 경향이다.

This study proposes a fully non-contact measurement method to assess acoustic nonlinearity of narrowband surface waves generated by a line-arrayed laser beam by using a laser-ultrasonic detector in the way of two-wave mixing (TWM) method. This method was applied to figure out a relationship between plastic deformation and nonlinearity characteristics of a plastically deformed aluminum specimens. The experimental results showed that the acoustic nonlinearity of the laser-generated surface wave increased proportionally to the level of tensile deformation. This tendency is in good agreement with the result of measurement by contact method with PZT-transducer.

키워드

참고문헌

  1. K. Y. Jhang, "Nonlinear Ultrasonic Techniques for Nondestructive Assessment of Micro Damage in Material: A Review," International Journal of Precision Engineering and Manufacturing, Vol. 10, No. 1, pp. 123-135 (2009) https://doi.org/10.1007/s12541-009-0019-y
  2. J. H. Cantrell, "Dependence of microelasticplastic nonlinearity of martensitic stainless steel in fatigue damage accumulation," Journal of Applied Physics, Vol. 100, pp. 063508 (2006) https://doi.org/10.1063/1.2345614
  3. J. L. Blackshire, S. Sathish, J. Na and J, Frouin, "Nonlinear Laser Ultrasonic Measurement of Localized Fatigue Damage," Review of Quantitative Nondestructive Evaluation, Vol. 22, pp. 1479-1488 (2003)
  4. C. B. Scruby and L. E. Drain, "Laser Ultrasonics: Techniques and Applications," Adan Hilger, Bristol (1990)
  5. T. H. Nam, S. H. Choi, T. H. Lee and K. Y. Jhang, C. S. Kim, "Acoustic Nonlinearity of Narrowband Laser-generated Surface waves in the Bending Fatigue of Al6061 Alloy," Journal of the Korean Physical Society, Vol. 97, pp. 1212-1217 (2010) https://doi.org/10.3938/jkps.57.1212
  6. C. S. Kim, T. Y. Nam, S. H. Choi and K. Y. Jhang, "Assessment of Plastic Deformation in Al6061 Alloy Using Acoustic Nonlinearity of Laser-Generated Surface Wave," Journal of the Korean Society for Nondestructive Testing, vol. 32, No. 1, pp. 20-26 (2012) https://doi.org/10.7779/JKSNT.2012.32.1.020
  7. S. H. Choi, T. H. Nam, K. Y. Jhang and C. S. Kim, "Frequency Response of Narrowband Surface Waves Generated by Laser Beams Spatially Modulated with a Line-arrayed Slit Mask," Journal of the Korean Physical Society, Vol. 60, No. 1, pp. 26-30 (2012) https://doi.org/10.3938/jkps.60.26
  8. A. Blouin, J. P. Monchalin, "Detection of Ultrasonic Motion of a Scattering Surface by Two-wave Mixing in A Photorefractive GaAs Crystal", Applied Physics Letter, Vol. 65, No. 8, pp. 932-934 (1994) https://doi.org/10.1063/1.112153
  9. G. Shui, J. Y. Kim, J. Qu, Y. S. Wang and L. J. Jacobs, "Anew technique for measuring the acoustic nonlinearity of meterials using Rayleigh waves," NDT & E International, Vol. 41, pp. 326-329 (2008) https://doi.org/10.1016/j.ndteint.2008.01.007

피인용 문헌

  1. Ultrasonic Nonlinearity of AISI316 Austenitic Steel Subjected to Long-Term Isothermal Aging vol.34, pp.3, 2014, https://doi.org/10.7779/JKSNT.2014.34.3.241
  2. Measurement of Ultrasonic Nonlinear Parameter by Using Non-Contact Ultrasonic Receiver vol.38, pp.10, 2014, https://doi.org/10.3795/KSME-A.2014.38.10.1133
  3. Non-contact measurement of elastic modulus by using laser ultrasound vol.16, pp.5, 2015, https://doi.org/10.1007/s12541-015-0118-x