Automatic Welding, 2021, №07



2021 №07 (06)

DOI of Article 10.37434/as2021.07.01

2021 №07 (02)

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Avtomaticheskaya Svarka (Automatic Welding), #7, 2021, pp. 3-8

Properties of butt joints of fine-sheet aluminum-lithium 1460 alloy, produced by friction stir and TIG welding

A.G. Poklyatsky, S.I. Motrunich, O.S. Kushnaryova

E.O. Paton Electric Welding Institute. 11 Kazymyr Malevych Str., 03150 Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The article analyzes the structural features, characteristics of strength and life of butt joints of aluminum-lithium 1460 alloy with a thickness of 2 mm, produced by friction stir welding and argon arc welding using non-consumable electrode. It is shown that friction stir welding prevents the formation of a large-dendritic structure of welds, provides the formation of dissimilar joints with a minimum level of stress concentration at the place of transition from the weld to the base material and allows avoiding defects in the welds in the form of pores, oxide fi lm and hot cracks, predetermined by melting and crystallization of metal during fusion welding. 16 Ref., 7 Fig.
Keywords: aluminum-lithium 1460 alloy, friction stir welding, hardness, defects, microstructure, tensile strength, fatigue resistance, fi ne structure


Received: 20.05.2021

References

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