Research on Detection Mechanism of Weld Defects of Carbon Steel Plate Based on Orthogonal Axial Eddy Current Probe

Author:

Huang Linnan,Liao Chunhui,Song XiaochunORCID,Chen Tao,Zhang Xu,Deng Zhiyang

Abstract

The uneven surface of the weld seam makes eddy current testing more susceptible to the lift-off effect of the probe. Therefore, the defect of carbon steel plate welds has always been a difficult problem in eddy current testing. This study aimed to design a new type of eddy current orthogonal axial probe and establish the finite element simulation model of the probe. The effect of the probe structure, coil turns, and coil size on the detection sensitivity was simulated. Further, a designed orthogonal axial probe was used to conduct a systematic experiment on the weld of carbon steel specimens, and the 0.2 mm width and 1 mm depth of weld defects of carbon steel plates were effectively detected. The experimental results showed that the new orthogonal axial eddy current probe effectively suppressed the unevenness effect of the weld surface on the lift-off effect during the detection process.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

Reference23 articles.

1. Research and Application of Pulsed Eddy Current Testing Technology for Pressure Equipment

2. Feature extraction and defect identification of eddy current testing signals on narrow lap weld;Liang;Chin. J. Mech. Eng.,2019

3. Study of Lift-Off Invariance for Pulsed Eddy-Current Signals

4. Application of eddy current inversion technique to the sizing of defects in Inconel welds with rough surfaces

5. Study of lift-off effects for pulsed eddy current nondestructive testing technique;Cao;J. Air Force Eng.,2011

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