Актуальные проблемы в машиностроении №2 2015

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Актуальные проблемы в машиностроении. 2015. №2 Технологическое оборудование,
оснастка и инструменты
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EDDY-CURRENT DETECTION OF TITANIUM ALLOY WELDS
Dmitriev S.F. 1, 2, Ph.D. (Engineering), Associate Professor, e-mail:
Katasonov A.O. 1,2, Engineer, e-mail:
Malikov V.N. 1, Ph.D. student, e-mail:
Sagalakov A.M. 1, . (Engineering), Professor, e-mail:
Shevtsova L.I. 3, Ph.D. student, e-mail:
1 Altai State University, 61 pr. Lenina, Barnaul, 656049, Russian Federation
2 Ltd. "NPF" Gamma Test ", 61 pr. Lenina, Barnaul, 656049, Russian Federation
3 Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian
Federation
Abstract
Based on the eddy current transducer (ect) of the transformer type, an eddy current probe is
developed to examine titanium plates joined by welding. The main specifications of the eddy
current transducer (coil diameter and a core material of the wire) are given. The measurement
procedure which makes it possible to test defects in titanium alloy welds is described. The concept
of virtualized devices in which the eddy current transducer is controlled by a personal computer is
used. The controlled parameter is the electric conductivity of the material and its distribution on the
surface and across the thickness of the object. Experimental results obtained by the eddy current
transducer using two welded titanium plates are presented. These results show the dependence of
the response of the eddy current transducer on a defect in such structures. These dependencies help
to determine the quality of the weld and to evaluate the reliability of welding.
Keywords
eddy current transducer, titanium, welds, nondestructive testing (NDT)