Assessment of nugget diameter of resistance spot welds using pulse eddy current thermography

被引：2

作者：

Taram, A. ^{[1
,2
]}

Roquelet, C. ^{[1
]}

Meilland, Ph ^{[1
]}

Le Noc, G. ^{[1
]}

Bodnar, J. L. ^{[2
]}

Duvaut, Th ^{[2
]}

Kaczynski, C. ^{[1
]}

Dupuy, Th ^{[1
]}

机构：

[1] ArcelorMittal Maizieres Res, F-57280 Maizieres Les Metz, France

[2] UFR, GRESPI, Sci Exactes & Nat, BP 1039, F-51687 Reims 02, France

来源：

THERMOSENSE: THERMAL INFRARED APPLICATIONS XL | 2018年 / 10661卷

关键词：

Resistance spot welding; nugget diameter; eddy current thermography; rear face thermal wave; camera resolution; NONDESTRUCTIVE EVALUATION; INSPECTION; NDT;

D O I：

10.1117/12.2305080

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper deals with the use of eddy current thermography for spot weld nugget diameter assessment. As a nondestructive testing method, eddy current thermography is successfully used to give an estimation of the nugget diameter of resistance spot weld. A ferrite-yoke based inductive coil is used to thermally heat-up spot welds while monitoring the opposite face of the heated face using infrared camera with 40 mu m/pixel spatial resolution. The inductive coil and the camera are placed at different side of the sample. The heat wave travels from one side to the other through areas with different thermal properties. The recorded thermal response is processed using Fourier transformation which allows identifying non-destructively the nugget and the heat affected zone. The nugget diameter is estimated in pixel and the camera resolution is used to retrieve the value in millimeters. The results, compared with destructive micrographic cut as a reference, are in good agreement.

引用

页数：8

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