Testing of circumferential discontinuities using remote magnetic field analysis

被引：0

作者：

Yasunishi, M ^{[1
]}

Ohtsuka, Y ^{[1
]}

Nishikawa, M ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Suprahigh Temperature Engn Lab, Suita, Osaka 5650871, Japan

来源：

MATERIALS EVALUATION | 2005年 / 63卷 / 03期

关键词：

nondestructive testing; remote field eddy current testing; circuniferential discontinuity;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The character of a circumferential discontinuity in a tube was tested using a three dimensional finite element technique applied to the analysis of remote field eddy current testing. A remote field eddy current probe with a small detector coil can detect the changes in the magnetic field due to the presence of a circumferential discontinuity in the tube material by rotating the probe along the inner tube wall when the exciter coil passes just below the discontinuity. The calculated signal yields a line segment on the complex plane for each condition of the circumferential discontinuity, while such an analysis yields a point for either a full circumferential discontinuity or no discontinuity. It was found that the depth and the angle of the discontinuity were associated with the distribution of the line segment, including a point on complex plane. This technique. is useful for testing circumferential discontinuity characteristics.

引用

页码：335 / 338

页数：4