Characteristics of Eddy Current Attenuation in Metal Clad Plates and Measurement of Cladding Thickness

IF 1 4区材料科学 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Research in Nondestructive Evaluation Pub Date : 2021-07-04 DOI:10.1080/09349847.2021.1930306

Quan Zhang, Jiayi Li, Yanfei Liao, Z. Zeng, Junming Lin, Yonghong Dai

引用次数: 2

Abstract

ABSTRACT A metal clad plate consists of a base layer and a clad layer of different materials. When testing clad plate using the eddy current (EC) method, the variation of EC density along the thickness direction in clad plate is complicated owing to the interface between the layers. This article attempts to investigate the characteristics of the variation of EC density in the thickness direction in clad plate based on finite element analysis. The results are then used for revealing the mechanism of the relation between coil voltage and the thickness of the clad layer which is essential for the measurement of cladding thickness. Thereupon, the experiment of measuring cladding thickness is performed, in which the testing frequency is selected based on the voltage-thickness relation. It turns out that the measurement is accurate and the results have good linearity.

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金属复层板涡流衰减特性及复层厚度测量

金属覆层板由基材层和不同材料的覆层组成。电涡流法检测复合板时，由于层间存在界面，电涡流密度沿厚度方向的变化较为复杂。本文尝试用有限元方法研究复合板中EC密度在厚度方向上的变化特征。研究结果用于揭示线圈电压与覆层厚度之间的关系机理，这对覆层厚度的测量至关重要。为此，进行了包层厚度测量实验，根据电压-厚度关系选择测试频率。结果表明，测量结果准确，线性度好。

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

Research in Nondestructive Evaluation 工程技术-材料科学：表征与测试

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Research in Nondestructive Evaluation® is the archival research journal of the American Society for Nondestructive Testing, Inc. RNDE® contains the results of original research in all areas of nondestructive evaluation (NDE). The journal covers experimental and theoretical investigations dealing with the scientific and engineering bases of NDE, its measurement and methodology, and a wide range of applications to materials and structures that relate to the entire life cycle, from manufacture to use and retirement. Illustrative topics include advances in the underlying science of acoustic, thermal, electrical, magnetic, optical and ionizing radiation techniques and their applications to NDE problems. These problems include the nondestructive characterization of a wide variety of material properties and their degradation in service, nonintrusive sensors for monitoring manufacturing and materials processes, new techniques and combinations of techniques for detecting and characterizing hidden discontinuities and distributed damage in materials, standardization concepts and quantitative approaches for advanced NDE techniques, and long-term continuous monitoring of structures and assemblies. Of particular interest is research which elucidates how to evaluate the effects of imperfect material condition, as quantified by nondestructive measurement, on the functional performance.