2022 №08 (01) DOI of Article
2022 №08 (03)

Automatic Welding 2022 #08
Avtomaticheskaya Svarka (Automatic Welding), #8, 2022, pp. 14-19

Deformation-free tig welding of AMг6 alloy with application of electrodynamic treatment of weld metal

L.M. Lobanov1, V.M. Korzhik1, M.O. Pashchin1, O.L. Mikhodui1, A.A. Grynyuk1, E.V. Illyashenko1, P.V. Goncharov1, P.R. Ustymenko2

1E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2NTUU «Igor Sikorsky Kyiv Polytechnic Institute», 6/2 Dashavska Str., 03506, Kyiv. E-mail: mail@kpi.ua

Application of electrodynamic treatment (EDT), taking into account the welding process peculiarities, is a new trend in engineering practice, enhancing the process capabilities. At the same time, a necessary condition for realization of fusion welding process, is heating of the weld metal with its further cooling to room temperature. Realization of EDT technology during welding promotes more intensive relaxation of welding stresses as a result of EDT, compared to weld metal treatment at room temperature. Proceeding from investigation results it was found that EDT of butt welded joint samples leads to transition of residual tensile welding stresses into compressive stresses. Experimental verifi cation of the residual stress-strain state with application of the method of electron speckle interferometry confi rmed the results of mathematical modeling, namely lowering of tensile stresses and increase of compressive stresses in the weld after EDT at temperature Т = 150 °С, compared to EDT at Т = 20 °С. It was proved that EDT of samples of butt joints from AMg6 alloy during TIG welding improves their production accuracy that is characterized by lowering of the level of their residual longitudinal grooving, compared to postweld EDT. 14 Ref., 2 Tabl., 6 Fig.
Keywords: electrodynamic treatment, electrode device, residual welding stresses, aluminium alloy, electric current pulse, impact interaction, indenter-electrode, membrane stresses, nonconsumable-electrode welding

Received: 21.06.2022


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