Defect detection in wire welded joints using thermography investigations

被引：8
|
作者：
Swiatczak, T. [1 ]
Tomczyk, M. [2 ]
Wiecek, B. [1 ]
Pawlak, R. [2 ]
Olbrycht, R. [1 ]
机构：
[1] Tech Univ Lodz, Inst Elect, PL-90924 Lodz, Poland
[2] Tech Univ Lodz, Inst Elect Engn Syst, PL-90924 Lodz, Poland
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2012年 / 177卷 / 15期
关键词：
Laser microtechnology; Laser wire bonding; Active thermography; Thermal impedance;
D O I：
10.1016/j.mseb.2012.03.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The formation of gas voids inside the wire joints during laser welding may cause internal defects (cracks and porosity), that are invisible from outside. Authors propose the application of active thermography for detection of such defects. Thermal camera was used to acquire sequences of thermograms showing the joints during transient heating. Fourier analysis enabled phase value calculation, which is different for defective and non-defective samples. Laboratory results were confirmed by simulations on prepared two-dimensional model. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：1239 / 1242
页数：4
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