Automatic Welding, 2024, №03



2024 №03 (07)

DOI of Article 10.37434/as2024.03.01

2024 №03 (02)

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Avtomaticheskaya Svarka (Automatic Welding), #4, 2024, pp. 3-10

Thermo-mechanical processes in friction stir welding of magnesium alloy sheets

М.А. Khokhlov¹, O.O. Makhnenko², V.A. Kostin¹, A.G. Pokliatskyi¹, Iu.V. Falchenko¹, Yu.A. Khokhlova¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Kyiv Academic University, 36 Acad, Vernatskyi str., 03142, Kyiv

Experimental laboratory equipment for friction stir welding (FSW) as a result of working out the optimal welding modes at different linear velocities allows producing high-quality butt joints from thin ductile metals. With the development of new mathematical methods for modeling thermodeformational processes, it became possible to analyze the stress-strain state and thermo-mechanical processes occurring in the FSW joint zone, which is necessary for predicting the operational properties, strength and service life of welded structures made of thin metal. Using mathematical models and finite element analysis, the temperature distributions from the volume heat source at FSW were visualized, and the residual deformations and stresses in the zone of butt-welded joints of thin sheets of magnesium alloys were numerically determined. In the future, it is advisable to determine the effective balance of the linear speed and the rotation speed of the FSW tool to obtain better homogeneity of the weld structure and reduce heat input into the metal during welding.
Keywords: magnesium alloys, friction stir welding, microstructure, modulus of elasticity, temperature distributions, residual stresses, plastic deformations

Received: 07.03.2024
Received in revised form: 16.04.2024
Accepted: 18.05.2024

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