Acoustic-Emission Procedure for Rejecting Defects in Multiple-Pass Girth Welds


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

A procedure is proposed for rejecting girth welds based on an analysis of the main parameters of acoustic emission (AE) signals recorded during multiple-pass welding. The accuracy of locating AE signals recorded from defects and their filtering from noise and interference were ensured by the use of a modified tabular method and rejection grid. Normalized coefficients were calculated from the energy and amplitude of localized AE signals and used for in-process assessment of weld quality. Threshold values were determined for the normalized coefficients above which the weld is rejected. Defects in girth welds were identified using this procedure, and the possibility of determining defect hazardousness in real time was demonstrated.

About the authors

L. N. Stepanova

Chaplygin Siberian Research Institute of Aviation; Siberian Transport University

Author for correspondence.
Email: aergroup@ngs.ru
Russian Federation, Novosibirsk, 630051; Novosibirsk, 630049

S. I. Kabanov

Chaplygin Siberian Research Institute of Aviation

Email: aergroup@ngs.ru
Russian Federation, Novosibirsk, 630051

I. S. Ramazanov

Chaplygin Siberian Research Institute of Aviation

Email: aergroup@ngs.ru
Russian Federation, Novosibirsk, 630051

V. V. Chernova

Chaplygin Siberian Research Institute of Aviation; Siberian Transport University

Email: aergroup@ngs.ru
Russian Federation, Novosibirsk, 630051; Novosibirsk, 630049

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2019 Pleiades Publishing, Ltd.