Depth Sizing of Intergranular Attack with Multi-Frequency Analysis of Eddy Current Data

被引：0

作者：

Lei, Jia ^{[1
]}

Horn, Dag ^{[1
]}

机构：

[1] Atom Energy Canada Ltd, Chalk River Labs, Inspect Monitoring & Dynam, Chalk River, ON K0J 1J0, Canada

来源：

40TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: INCORPORATING THE 10TH INTERNATIONAL CONFERENCE ON BARKHAUSEN NOISE AND MICROMAGNETIC TESTING, VOLS 33A & 33B | 2014年 / 1581卷

关键词：

Eddy Current; Intergranular Attack;

D O I：

10.1063/1.4864991

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Depth sizing of intergranular attack (IGA) with conventional eddy-current analysis is difficult, and typically gives results of poor accuracy. This paper presents a sizing technique using multi-frequency analysis for bobbin probe and X-Probe eddy-current data, along with a case study of outer-surface IGA in 0.510" (12.95 mm) diameter, 0.044" (1.12 mm) wall Alloy 600 tubing. A mathematical framework for the expected eddy-current phase and amplitude response is provided. Using this formulation, eddy-current amplitude and phase responses at four inspection frequencies are calculated, and compared to the corresponding measured responses. IGA flaw geometry is approximated through the optimization of flaw parameters via a least-squares minimization of the residual from the comparison.

引用

页码：1441 / 1447

页数：7

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