원심 주조 스텐레스 강에서의 이론적 모델을 통한 Beam Skewing 영향 고찰

A study on the effect of ultrasonic beam skewing based on theoretical model approach in CCSS

  • 이삼래 (한국원자력연구소 비파괴시험연구실) ;
  • 임형택 (한국원자력연구소 비파괴시험연구실) ;
  • 이윤상 (한국원자력연구소 비파괴시험연구실)
  • 발행 : 1990.05.30

초록

Centrifugally Cast Stainless Steel generally shows similar structure to the weld in austenitic stainless steel in the point of casting. When examining this material ultrasonically, the beam does not generally propagate straightforward but rather deviates from its original direction and this phenomenon called skewing is originally caused by anisotropic material. In order to calculate the beam skewing effect theoretically, work has been performed based on a model approach which has regarded material itself as having been composed of multi-layered columnar dendrite structure and the result was compared with the one from experiment. The result from both theory and experiment showed good correlation and ultrasonic beam showed the least skewing with around 45 degree incident angle.

키워드