NDLI: Thermosonic Inspection of a Welded SUS Plate

Content Provider	IEEE Xplore Digital Library
Author	JaiWan Cho ChinMan Chung SeungHo Jung HyunKyu Jung
Copyright Year	2006
Description	Author affiliation: Nucl. Robotics Lab., Korea Atomic Energy Res. Inst., Daejon (JaiWan Cho; ChinMan Chung; SeungHo Jung; HyunKyu Jung)
Abstract	The technique of bringing a sample to vibration in the near ultrasound regime (20 kHz and above) and to look at the thermal signal of the surface with an infrared camera has been used for several years as a nondestructive evaluation tool to detect defects such as cracks within materials. The basic idea of this technique is to excite the part with a short (~ 280 ms duration) pulse of ultrasonic power (~ 2 kW, ~ 20 kHz). The relative motion of defect faces causes the ultrasound energy to dissipate locally at the defect. In turn, this energy acts as a localized heat source (hot spot). The resulting surface temperature change in the vicinity of the defect is imaged by means of a thermal infrared camera. The sequence of images, taken before, during, and after the application of the ultrasonic pulse, reveals the presence of the defect. In this paper we show results of our investigations regarding the hot spot generation at defects in the welded thin SUS plate
Starting Page	1635
Ending Page	1639
File Size	4891565
Page Count	5
File Format	PDF
ISBN	8995003847
DOI	10.1109/SICE.2006.315522
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-18
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	The Institute of Control, Automation and Systems
Subject Keyword	Inspection Ultrasonic imaging Infrared detectors Cameras Eddy currents Surface waves Heating Surface cracks Spot welding Adhesives Non-Destructive Evaluation Ultrasound Thermography Defect
Content Type	Text
Resource Type	Article

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