RT journal article
T1 A New Insight on Phased Array Ultrasound Inspection in MIG/MAG Welding
A1 Alonso del Rosario, José Juan
A1 Pavón Quintana, Santiago
A1 Perdigones, José
A1 Carpena, Isaac
A2 Ciencias y Técnicas de la Navegación y Construcciones Navales
A2 Física Aplicada
K1 MIG/MAG welding
K1 ultrasound inspection
K1 phased array
K1 digital images
AB Weldment inspection is a critical process in the metal industry. It is first conducted visually, then manually and finally using instrumental techniques such as ultrasound. We made one hundred metal inert/active gas (MIG/MAG) weldments on plates of naval steel S275JR+N with no defects, and inducing pores, slag intrusion and cracks. With the objective of the three-dimensional reconstruction of the welding defects, phased array ultrasound inspections were carried out. Error-free weldment probes were used to provide the noise level. The results can be summarized as follows. (i) The top view obtained from the phased array provided no conclusive information about the welding defects. The values of the echo amplitudes were about 70 mV for pores and cracks, and greater than 150 mV for slag intrusion, all of which showed great variability. (ii) The sectional data did not lie at the same depths and they needed to be interpolated. (iii) The interpolated sectional views, or C-scans, allowed the computation of top views at any depth, as well as the three-dimensional reconstruction of the defects. (iv) The use of the simplest tool, consisting of the frequency histogram and its statistical moments, was sufficient to classify the defects. The mean echo amplitudes were 33 mV for pores, 72.16 mV for slag intrusion and 43.19 mV for cracks, with standard deviations of 8.84 mV, 24.64 mV and 12.39 mV, respectively. These findings represent the first step in the automatic classification of welding defects.
PB MDPI
SN 1996-1944
YR 2022
FD 2022-04
LK http://hdl.handle.net/10498/26938
UL http://hdl.handle.net/10498/26938
LA eng
NO This research was funded by CEI.MAR Cadiz, 2020-PR003.
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026