A multi-frequency eddy current inversion method for characterizing conductivity gradients on water jet peened components

被引：22

作者：

Sundararaghavan, V

Balasubramaniam, K

Babu, NR

Rajesh, N

机构：

[1] Indian Inst Technol, Ctr NDE, Dept Engn Mech, Madras 600036, Tamil Nadu, India

[2] Indian Inst Technol, Dept Engn Mech, Mfg Engn Sect, Madras 600036, Tamil Nadu, India

来源：

NDT & E INTERNATIONAL | 2005年 / 38卷 / 07期

关键词：

multi-frequency eddy current testing; inverse model; water jet peening; conductivity gradient measurements;

D O I：

10.1016/j.ndteint.2005.01.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper describes a multi-frequency eddy current inversion procedure for characterizing specimens that are water jet peened. Multifrequency inductance data was obtained by using well-characterized eddy current probes. The inversion uses a multi-layer axisymmetric finite element model as the forward model and the conductivity of each layer is found through interpolation of the inductance-conductivity data generated by the for-ward model. Skin depth approximation was used to isolate the integral effects of the conductivity variation on the inductance signal. Inverted conductivity profiles of the water jet peened specimens was found to resemble the predicted profiles. Information regarding the shape of residual stress gradients and relative intensities of peening were inferred from the conductivity profiles. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：541 / 547

页数：7

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