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집중유도형 교류전위차법의 알루미륨 탐촉자에 의한 강자성체 표면결함의 평가 KCI 등재

Evaluation of Surface Defects in Ferromagnetic Materials by Aluminum Probe of ICFPD Method

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한국기계기술학회지 (Journal of the Korean Society of Mechanical Technology)
한국기계기술학회 (Korean Society of Mechanical Technology)
초록

Most structures require high reliability to ensure safety and soundness. The materials used for these structures are not only defective in the manufacturing process and construction process, but also cause generation and progress of defects due to operation of various complex use environments. In order to improve the reliability of the structure, it is very important to detect and estimate the defect size. The method of evaluating these defects without damaging the structure is a non-destructive method. In this paper, an aluminum probe of AC potential drop(ACPD) method is applied to the evaluation of two-dimensional artificial defects in ferromagnetic materials. Since the potential drop of the defect end is larger than that of the sound area, the defect can be detected and its position can be clearly confirmed, and the potential drops are changed according to the depth of the defect. The potential drop ratio (Vjmax/Vs) of the defective area has a large value for the defect. The relationship between the potential drop ratio (Vjmax/Vs) of 10 kHz and the defect depth can reduce the error in predicting the depth.

목차
ABSTRACT
 1. 서 론
 2. 실험 방법
  2.1 시험편
  2.2 측정 장치 및 측정방법
 3. 실험 결과 및 고찰
  3.1 측정전위차분포
 4. 결 론
 References
저자
  • 김훈(Chonnam National University) | Hoon Kim Corresponding Author