Citation

Abbasi Z, Yuhas D, Zhang L, Basantes AD, Tehrani NN, Ozevin D, Indacochea E. Materials (Basel) 2018; 11(1): e11010128.

Affiliation

Civil & Materials Engineering Department, University of Illinois at Chicago, Chicago 60607, IL, USA. jeindaco@uic.edu.

Copyright

(Copyright © 2018, MDPI: Multidisciplinary Digital Publishing Institute)

DOI

10.3390/ma11010128

PMID

29342875

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.

Language: en

Keywords

Burn-through; air-coupled ultrasonics; noncontact; weld bead width