Eng
Ukr
Rus
Print

2021 №07 (06) DOI of Article
10.37434/as2021.07.01
2021 №07 (02)

Automatic Welding 2021 #07
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

1. Bratukhin, A.G. (2003) Modern aircraft materials: Technological and functional peculiarities. Moscow, Aviatekhinform [in Russian].
2. Beletsky, V.M., Krivov, G.A. (2005) Aluminium alloys (Composition, properties, technology, application): Refer. book. Ed. by I.N. Fridlyander. Kiev, KOMINTEKh [in Russian].
3. (2002) Aircraft materials. Selected works of VIAM for 1932- 2002. In: Jubilee Sci.-Techn. Collect. Ed. by E.N. Kablov. Moscow, MISIS VIAM, 198-220 [in Russian].
4. Rabkin, D.M., Lozovskaya, A.V., Sklabinskaya, I.E. (1992) Physical metallurgy of welding of aluminium and its alloys. Ed. by V.N. Zamkov. Kiev, Naukova Dumka [in Russian].
5. Mashin, V.S., Poklyatsky, A.G., Fedorchuk, V.E. (2005) Mechanical properties of aluminium alloys in consumable and nonconsumable electrode arc welding. The Paton Welding J., 9, 39-45.
6. Thomas, W.M., Nicholas, E.D., Needham, J.C. et al. (1991) Friction stir butt welding. Int. Patent Application PCT/GB 92/02203; GB Patent Application 9125978.8.
7. Dawes, C.J., Thomas, W.M. (1996) Friction stir process welds aluminum alloys. Welding J., 3, 41-45.
8. Defalco, J. (2006) Friction stir welding vs. fusion welding. Ibid., 3, 42-44.
9. Ericsson, M., Sandstrom, R. (2003) Infl uence of melding speed on the fatigue of friction stir welds, and comparison with MIG and TIG. Int. J. Fatigue, 25, 1379-1387. https://doi.org/10.1016/S0142-1123(03)00059-8
10. Enomoto, M. (2003) Friction stir welding: Research and industrial applications. Welding Intern., 5, 341-345. https://doi.org/10.1533/wint.2003.3114
11. Larsson, H., Karlsson, L., Svensson, L. (2000) Friction stir welding of AA5083 and AA6082 aluminium alloys. Svetsaren, 2, 6-10.
12. Ishchenko, A.Ya., Poklyatsky, A.G. (2010) Tool for friction stir welding of aluminium alloys Pat. 54096, Int. Cl. B23K 20/12; u201005315; filled 30.04.2010; publ. 25.10, PWI [in Ukrainian].
13. Darovsky, Yu.F., Markashova, L.I., Abramov, N.P. et al. (1985) Procedure of thinning of dissimilar welded joint samples for electron microscopic examinations. Avtomatich. Svarka, 12, 60 [in Russian].
14. Poklyatsky, A.G., Lozovskaya, A.V., Grinyuk, A.A. (2002) Prevention of formation of oxide fi lms in welds on Li-containing aluminium alloys. The Paton Welding J., 12, 39-42.
15. Lukianenko, A., Motrunich, S., Labur, T. et al. (2020) Mechanical properties of welded thin sheets of Al-Cu-Li alloy and noise level assessment during FSW and TIG welding. FME TRANSACTIONS, 49(1), 220-224. https://doi.org/10.5937/fme2101220L
16. Motrunich, S., Klochkov, I., Poklyatsky, A. (2020) High cycle fatigue behaviour of thin sheet joints of aluminium-lithium alloys under constant and variable amplitude loading. Weld World, 64, 1971-1979. https://doi.org/10.1007/s40194-020-00976-2

Advertising in this issue: