Determination of Detectability Thresholds for Crack-Like Defects During In-Line Magnetic Diagnostics

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Russian Journal of Nondestructive Testing Pub Date : 2026-09-22 DOI:10.1134/S1061830926601480

A. V. Mikhailov, A. E. Kuskov, V. V. Lopatin, A. N. Kukushkin, Ya. G. Smorodinskii, V. N. Kostin, D. V. Novgorodov, A. V. Nikitin, L. V. Mikhailov

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引用次数: 0

Abstract

In this study, the limitations of the magnetic flux leakage (MFL) method for detecting single cracks in pipelines in accordance with GOST R 55999-2014 have been defined and refined. Parametric finite-element 2D and 3D-models validated on actual defects have been used to calculate the magnetic leakage field strength depending on defect’s geometric parameters. It has been established that the minimal defect length for transitioning to a 2D model is 200 mm. Reliable detection (probability >90%) has been shown to be achieved at a threshold value of dHx = 15 A/cm. The minimal detectable crack depths have been determined as a function of crack opening: 0.56 of the wall thickness for an opening of 20 μm, 0.20 for 50 μm, and 0.12 for 100 μm. Cracks with an opening of 10 μm are not detected even at a depth of 0.85 of the wall thickness.

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在线磁诊断中裂纹类缺陷可检测阈值的确定

本研究明确并细化了GOST R 55999-2014中漏磁法检测管道单裂纹的局限性。利用在实际缺陷上验证过的参数化有限元二维和三维模型，计算了随缺陷几何参数变化的漏磁场强度。已确定过渡到二维模型的最小缺陷长度为200 mm。可靠的检测（概率>；90%）已被证明在dHx = 15 a /cm的阈值下实现。最小可检测裂纹深度与裂纹开度的关系为：开度为20 μm时为壁厚的0.56，开度为50 μm时为0.20，开度为100 μm时为0.12。即使在壁厚的0.85深度，也无法检测到开口为10 μm的裂纹。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Russian Journal of Nondestructive Testing 工程技术-材料科学：表征与测试

CiteScore

1.60

自引率

44.40%

发文量

审稿时长

6-12 weeks

期刊介绍： Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).