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Materials 2018, 11(1), 128; https://doi.org/10.3390/ma11010128

The Detection of Burn-Through Weld Defects Using Noncontact Ultrasonics

1
Civil & Materials Engineering Department, University of Illinois at Chicago, Chicago, IL 60607, USA
2
Industrial Measurement Systems Inc., Aurora, IL 60502, USA
*
Author to whom correspondence should be addressed.
Received: 6 December 2017 / Revised: 8 January 2018 / Accepted: 8 January 2018 / Published: 13 January 2018
(This article belongs to the Section Manufacturing Processes and Systems)
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Abstract

Nearly all manufactured products in the metal industry involve welding. The detection and correction of defects during welding improve the product reliability and quality, and prevent unexpected failures. Nonintrusive process control is critical for avoiding these defects. This paper investigates the detection of burn-through damage using noncontact, air-coupled ultrasonics, which can be adapted to the immediate and in-situ inspection of welded samples. The burn-through leads to a larger volume of degraded weld zone, providing a resistance path for the wave to travel which results in lower velocity, energy ratio, and amplitude. Wave energy dispersion occurs due to the increase of weld burn-through resulting in higher wave attenuation. Weld sample micrographs are used to validate the ultrasonic results. View Full-Text
Keywords: Burn-through; weld bead width; noncontact; air-coupled ultrasonics Burn-through; weld bead width; noncontact; air-coupled ultrasonics
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Abbasi, Z.; Yuhas, D.; Zhang, L.; Basantes, A.-D.-C.; Tehrani, N.N.; Ozevin, D.; Indacochea, E. The Detection of Burn-Through Weld Defects Using Noncontact Ultrasonics. Materials 2018, 11, 128.

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