Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Ultrasonic Detection of Small Crack in Studs[Bolts] by Time Difference of Thread Signals(TDTS)

초음파진행 시간차에 의한 STUD[BOLT] 나사산의 미세한 결함검출

  • 서동만 (한국원자력연구소 비파괴시험연구실) ;
  • 박대영 (한국원자력연구소 비파괴시험연구실) ;
  • 김종교 (전북대학교 전자공학과)
  • Published : 1990.05.30
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Abstract

It is difficult to detect such flaws as stress - corrosion cracking or corrosion wastage(loss of bolt diameter) in the threads. In many cases the critical size of a flaw is very small(1-2 mm order). This paper describes how it is possible to discriminate small flaw indications in threads using the time difference or thread signals(TDTS) by a signal-conditioning technique.

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