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Estimation of Flaw Depth and Height by Radiography

방사선투과사진에 의한 결함깊이 및 높이의 평가

  • 강계명 (서울산업대학교 신소재공학과) ;
  • 박은수 (서울산업대학교 신소재공학과) ;
  • 심언덕 (동양검사기술(주))
  • Published : 2002.08.01

Abstract

The three-dimensional estimation on the depth and height of flaw by using the difference of radiographic contrast density was studied. First, the specimens having artificial flaws of various depths and heights were prepared and the radiographic testing was performed. The radiographic depth of flaw was investigated and estimated on the effect of the scattered radiation with the change of distance between flaw and film. The height of flaw was estimated from the radiographic test with the reference specimen. The radiographic contrast with flaw depth decreased with increasing the flaw depth. The scattered radiation increased with increasing flaw depth and varied with the location between flaw and film. However, in the case of flaw height, the contrast density increased with increasing flaw height. It is thought due to the change in volume generating the scattered radiation which reaches a film.

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