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Proceedings Paper

Real-time nondestructive monitoring of the gas tungsten arc welding (GTAW) process by combined airborne acoustic emission and non-contact ultrasonics
Author(s): Lu Zhang; Alexandra-Del-Carmen Basantes-Defaz; Zeynab Abbasi; Donald Yuhas; Didem Ozevin; Ernesto Indacochea
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Paper Abstract

Welding is a key manufacturing process for many industries and may introduce defects into the welded parts causing significant negative impacts, potentially ruining high-cost pieces. Therefore, a real-time process monitoring method is important to implement for avoiding producing a low-quality weld. Due to high surface temperature and possible contamination of surface by contact transducers, the welding process should be monitored via non-contact transducers. In this paper, airborne acoustic emission (AE) transducers tuned at 60 kHz and non-contact ultrasonic testing (UT) transducers tuned at 500 kHz are implemented for real time weld monitoring. AE is a passive nondestructive evaluation method that listens for the process noise, and provides information about the uniformity of manufacturing process. UT provides more quantitative information about weld defects. One of the most common weld defects as burn-through is investigated. The influences of weld defects on AE signatures (time-driven data) and UT signals (received signal energy, change in peak frequency) are presented. The level of burn-through damage is defined by using single method or combine AE/UT methods.

Paper Details

Date Published: 27 March 2018
PDF: 9 pages
Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 105991V (27 March 2018); doi: 10.1117/12.2297455
Show Author Affiliations
Lu Zhang, Univ. of Illinois at Chicago (United States)
Alexandra-Del-Carmen Basantes-Defaz, Univ. of Illinois at Chicago (United States)
Zeynab Abbasi, Univ. of Illinois at Chicago (United States)
Donald Yuhas, Industrial Measurement Systems Inc. (United States)
Didem Ozevin, Univ. of Illinois at Chicago (United States)
Ernesto Indacochea, Univ. of Illinois at Chicago (United States)


Published in SPIE Proceedings Vol. 10599:
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII
Peter J. Shull, Editor(s)

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