The Paton Welding Journal, 2022, #8, 3-8 pages
Deformation-free TIG welding of AMg6 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
E.O. Paton Electric Welding Institute of the NAS of Ukraine.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
NTUU «Igor Sikorsky Kyiv Polytechnic Institute», 6/2 Dashavska Str., 03506, Kyiv. E-mail: email@example.com
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.
electrodynamic treatment, electrode device, residual welding stresses, aluminium alloy, electric current pulse, impact
interaction, indenter-electrode, membrane stresses, nonconsumable-electrode welding
1. Madi, Y., Besson, J. (2014) Effect of residual stresses on brittle fracture. Mat. ECRS-9. UTT, Troyes, Franse.
2. Masubuchi, K. (1980) Analisis of welded structures, Pergamon Press, Oxford, United Kingdom.
3. Shao, Quan, Kang, Jiajie, Xing, Zhiguo et al. (2019) Effect of pulsed magnetic field treatment on the residual stress of 20Cr2Ni4A steel. Journal of Magnetizm and Magnetic Materials, 476, 218-224. https://doi.org/10.1016/j.jmmm.2018.12.105
4. Stepanov, G.V., Babutskii, A.I., Mameev, I.A., et al. (2011) Redistribution of residual welding stresses in pulsed electromagnetic treatment. Strength of Materials, 43(3), 326-331. https://doi.org/10.1007/s11223-011-9300-2
5. Lobanov L.M., Pashchyn N.A., Kondratenko I.P. et al. (2018) Development of Post-weld Electrodynamic Treatment Using Electric Current Pulses for Control of Stress-Strain States and Improvement of Life of Welded Structures. Materials Performance and Characterization, 7, 4. ISSN 2379-1365 https://doi.org/10.1520/MPC20170092
6. Lobanov, L.M., Pashchyn, M.O., Tymoshenko, O.M. et al. (2020) Increase in the life of welded joints of AMg6 aluminum alloy. TPWJ, 4, 2-8. https://doi.org/10.37434/as2020.04.01
7. Conrad, H., Sprecher, A. (1989) The electroplastic effect in metals. Elsevier Science Publishers B.V., Dislocations in Solids Ed. by F.R.N. Nabarro.
8. Stepanov, G.V., Babutskii, A.I., Mameev, I.A. (2004) High-Density Pulse Current-Induced Unsteady Stress-Strain State in a Long Rod. Strength of Materials 36, 377-381. https://doi.org/10.1023/B:STOM.0000041538.10830.34
9. Lobanov, L.M., Pashchyn, M.O., Mikhoduj, O.L. et al. (2022) Electrodynamic treatment of welded joints of aluminium AMg6 alloy in the process of heating the weld metal. Avtomaticheskaya Svarka (Automatic Welding), 4, 3-7. https://doi.org/10.37434/as2022.04.01
10. Lobanov, L.M., Pashchyn, M.O., Mikhoduj, O.L., Sydorenko Yu.M. (2017) Effect of the Indenting Electrode Impact on the Stress-Strain State of an AMg6 Alloy on Electrodynamic Treatment. Strength of Materials, 49, 3, 369-380. https://doi.org/10.1007/s11223-017-9877-1
11. Sydorenko, Y.M., Pashchyn, M.O., Mykhodui, O.L. et al. (2020) Effect of Pulse Current on Residual Stresses in AMg6 Aluminum Alloy in Electrodynamic Treatment. Ibid, 52(5), 731-737. https://doi.org/10.1007/s11223-020-00226-2
12. Lobanov, L.M., Pashchyn, M.O., Mikhoduj, O.L., Sydorenko Yu.M. (2018) Electric Pulse Component Effect on the Stress State of AMg6 Aluminum Alloy Welded Joints Under Electrodynamic Treatment. Ibid, 50(2), 246-253. https://doi.org/10.1007/s11223-017-9862-8
13. Lobanov, L.M., Pashchyn, M.O., Mikhodui, O.L., Sydorenko Yu.M. (2022) Calculated evaluation of stress-strain states of welded joints of aluminium AMg61 alloy under the action of electrodynamic treatment of weld metal in the process of fusion welding. The Paton Welding J., 7, 3-8. https://doi.org/10.37434/as2022.07.01
14. Lobanov, L.M., Pashchyn, M.O., Mikhoduj, O.L., Khokhlova J.A. (2016) Investigation of residual stresses in welded joints of heat-resistant magnesium alloy ML10 after electrodynamic treatment. Journal of Magnesium and Alloys, 4, 2, 77-82. https://doi.org/10.1016/j.jma.2016.04.005
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