Study on depth evaluation method for surface defects of austenitic stainless steel pressure pipes based on ECAT method

[摘要] This paper aimed at the problem that it is impossible to evaluate the depths of the surface-breaking defect of austenitic stainless steel pressure pipes using the Magnetic Particle Testing(MT) and Penetration Testing(PT) methods. A quantitative method for measuring the depths of the surface-breaking defect of austenitic stainless steel pressure pipes based on eddy current array testing (ECAT) was proposed. According to the imaging features of defective ECAT correlation, by analyzing the change trend of the color, impedance amplitude and impedance phase of the C scanning, the corresponding relationship between the depth of the defect can be established, and finally, the effective evaluation of the depth of the opening defect on the surface of the material can be realized. Simulation and experimental results verify the effectiveness and reliability of the proposed method.

[发布机构] Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou, Guangdong, China^1;China Special Equipment Testing Institute, Beijing, China^2

[效力级别] 无线电电子学

[关键词] Depth evaluations;Eddy current arrays;Imaging features;Magnetic particle testing;Penetration testing;Pressure pipes;Quantitative method;Surface breaking defects