Imaging a weld cross-section using a novel frequency feature in multi-frequency eddy current testing

被引：13

作者：

Xu H. ^{[1
]}

Lu M. ^{[1
]}

Avila J.R.S. ^{[1
]}

Zhao Q. ^{[2
]}

Zhou F. ^{[3
]}

Meng X. ^{[4
]}

Yin W. ^{[1
]}

机构：

[1] School of Electrical and Electronic Engineering, University of Manchester, Manchester

[2] College of Engineering, Qufu Normal University, Rizhao

[3] WMG, University of Warwick, Coventry

[4] School of Environment, Education and Development, University of Manchester, Manchester

来源：

Insight: Non-Destructive Testing and Condition Monitoring | 2019年 / 61卷 / 12期

基金：

中国国家自然科学基金;

关键词：

24;

D O I：

10.1784/insi.2019.61.12.738

中图分类号：

学科分类号：

摘要：

In this paper, a novel frequency feature (the frequency at which the real part of the inductance reaches a specified value) is proposed for imaging an X70 welding cross-section. It is derived that this frequency feature is related to the permeability of the sample and therefore the imaging results obtained from this feature are a reflection of the electromagnetic properties (in particular permeability) map of the sample. The resulting images are then compared with the weld macrograph and the hardness map. The shape and contour of three weld zones (fusion zone, heat-affected zone and base metal) can be identified. This novel imaging method has a high sensitivity to changes in microstructure and, by adjusting the inductance value it crosses, the frequency range can be adjusted to suit the capability of a particular instrument. © 2019 British Institute of Non-Destructive Testing. All rights reserved.

引用

页码：738 / 743

页数：5

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