Automatic Welding, 2023, №12



2023 №12 (04)

DOI of Article 10.37434/as2023.12.05

2023 №12 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #12, 2023, pp. 34-38

Strength and structure of MA2-1M magnesium alloy butt joints produced by argon arc welding with a non-consumable electrode and by friction with stirring

A.G. Poklyatskyi¹, V.E. Fedorchuk¹, S.I. Motrunich¹, Yu.V. Falchenko¹, М. Sahul²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Czech Technical University. 166 36, Prague, Czech Republic. E-mail: miroslav.sahul1@fs.cvut.cz

The article analyzes the results of research of structural features and tensile strength of butt joints of 2 mm thick sheets of structural MA2-1M magnesium alloy produced by argon arc welding with a non-consumable electrode and by friction with stirring. It is shown that in friction stir welding as a result of intense plastic deformation of the metal, a fine crystalline structure is formed in the welds. It was determined that microhardness of the metal in such a welded joint has minimum values in the zone of thermomechanical effect on the side of the deviation near the heat-affected-zone, where the fracture of the specimens occurs during their static tension. Tensile strength of specimens of welded joints produced by friction with stirring, and specimens with penetrations removed to the level of the base material and additionally cleaned reinforcements of welds produced by melting, is at the level of 233...236 MPa, which amounts to ~84% of this index for the base material. Ref. 13, Tabl. 1, Fig. 6.
Keywords: magnesium alloy, friction stir welding, argon arc welding, structure, microhardness, strength


Received: 22.09.2023

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