비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제30권3호
  • /
  • Pages.200-206
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  • 2010
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  • 1225-7842(pISSN)
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  • 2287-402X(eISSN)
한국비파괴검사학회 (The Korean Society for Nondestructive Testing)
권호 표지

Characteristics on Temperature Evolution in the Metallic Specimen by Ultrasound-Excited Thermography

  • Choi, M.Y. (Safety Metrology Group, Korea Research Institute of Standards and Science) ;
  • Park, J.H. (Safety Metrology Group, Korea Research Institute of Standards and Science) ;
  • Kang, K.S. (Measurement Technology Development Team, Hyundai Steel Co.) ;
  • Kim, W.T. (Mechanical System Engineering, Kongju National University)
  • 투고 : 2009.11.08
  • 심사 : 2010.06.10
  • 발행 : 2010.06.30
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초록

In ultrasound-excited thermography, the injected ultrasound to an object is transformed to heat and the appearance of defects can be visualized by thermography camera. The advantage of this technology is selectively sensitive to thermally active defects. Despite the apparent simplicity of the scheme, there are a number of experimental considerations that can complicate the implementation of ultrasound excitation thermography inspection. Factors including acoustic horn location, horn-crack proximity, horn-sample coupling, and effective detection range all significantly affect the detect ability of this technology. As conclusions, the influence of coupling pressures between ultrasound exciter and specimen was analyzed, which was dominant factor in frictional heating model.

키워드

참고문헌

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