基于 Tx-Rx 脉冲涡流测试探头的异种金属焊接缺陷检测与评估

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
Jin Wang, Qing Zhang, Chunxiong Ding, Yi Ren, Jianbo Chu, Haitao Wang, Yueming Zhu
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引用次数: 0

摘要

摘要 异种金属焊缝(DMWs)广泛应用于核电站的许多部件,可能会因损坏(如腐蚀)而导致灾难性故障。脉冲涡流检测(PECT)具有宽带特性和高抗升离能力等优点,可用于 DMW 检测。然而,由于 PECT 的结构和材料比较复杂,有关其用于 DMW 检测的研究很少。本文基于发射器-接收器(Tx-Rx)PECT 探头,研究了 DMW 的缺陷检测和评估。模拟和实验研究表明,为了获得更好的探测精度,探头的 Tx 线圈应位于压力容器上方,Rx 线圈应位于焊缝上方,并提出了 Tx 和 Rx 线圈之间的最小距离。此外,差分信号的峰值和二阶高斯函数拟合差分信号的系数 a1 可用于缺陷评估。本文的研究有利于使用 PECT Tx-Rx 探头进行 DMW 检测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Detection and Evaluation of Dissimilar Metal Weld Defects Based on the Tx-Rx Pulsed Eddy Current Testing Probe

Detection and Evaluation of Dissimilar Metal Weld Defects Based on the Tx-Rx Pulsed Eddy Current Testing Probe

Detection and Evaluation of Dissimilar Metal Weld Defects Based on the Tx-Rx Pulsed Eddy Current Testing Probe

Dissimilar metal welds (DMWs), widely used in many components of nuclear power plants, may cause catastrophic failures because of damages (such as corrosion). Pulsed eddy current testing (PECT) could be used for DMW detection for its advantages of broadband property and high lift-off immunity. However, the research on PECT for DMW detection has seldom been studied because its structure and material are complicated. In this paper, the detection and evaluation of flaws in DMWs are studied based on the transmitter-receiver (Tx-Rx) PECT probe. Simulation and experiment studies show that, for better detection accuracy, the Tx coil of the probe should be located above the pressure vessel, the Rx coil should be located above the weld, and the minimum distance between the Tx and Rx coils is suggested. Moreover, the peak value of the differential signal and the coefficient a1 of the fitted differential signals with a second-order Gaussian function can be used for defect evaluation. The research in this paper is beneficial for DMW detection by using PECT Tx-Rx probes.

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来源期刊
Russian Journal of Nondestructive Testing
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
59
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).
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