Eng
Ukr
Rus
Print

2021 №08 (06) DOI of Article
10.37434/as2021.08.07
2021 №08 (08)

Automatic Welding 2021 #08
Avtomaticheskaya Svarka (Automatic Welding), #8, 2021, pp. 35-40

Structure and mechanical properties of 2219-T87 aluminum alloy joints produced by flash butt welding

S.І. Kuchuk-Yatsenko, K.V. Hushchyn, I.V. Ziakhor, S.M. Samotryasov, M.S. Zavertannyi, A.M. Levchuk
E.O. Paton Electric Welding Institute. 11 Kazymyr Malevych Str., 03150 Kyiv, Ukraine. E-mail: office@paton.kiev.ua

During designing and manufacture of aircraft structures from modern thermomechanically strengthened aluminium alloys, there is a problem of producing welded joints with satisfactory mechanical properties without further heat treatment of large-sized products. In the work the formation of joints of thermomechanically strengthened 2219-T87 alloy during fl ash butt welding was investigated. It was found that a low-temperature resistance heating in combination with a short-term heating by fl ashing provide the formation of defect-free welded joints. Metallographic examinations showed that the joints are formed through a thin layer of melt, which is a necessary condition for a high-quality welding of aluminium alloys. The infl uence of intense plastic deformation during upsetting with a forced formation on the morphology of θ-phase (CuAl2) particles was studied. A decrease in the values of hardness in the joint area as a result of dissolution and coagulation of a strengthening θ`-phase was established. The strength of welded joints both along and across the rolled metal lines amounts to 76 % of the strength of the base metal. 20 Ref., 2 Tabl., 7 Fig.
Keywords: aluminium 2219 alloy, fl ash butt welding, welded joint, mechanical properties.


Received: 05.07.2021

References

1. Gureeva, M.A., Grushko, O.E. (2009) Aluminium alloys in welded structures of modern transport vehicles. Mashinostroenie i Inzhenernoe Obrazovanie, 3, 27-41 [in Russian].
2. Setyukov, O.A. (2013) 1201 auminium alloy in structure of spacecraft «Buran». Aviats.
3. Federal Aviation Administration Flight Standards Service (2018) Aviation Maintenance Technician Handbook. [online] Available at: [Accessed 01 July 2021].
4. ASTM International - Standards Worldwide, (2014) ASTM B209M - 14 Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric). [online] Available at: [Accessed 02 July 2021].
5. George, E., Totten, G.E. (2003) Handbook of Aluminum. Volume 1: Physical Metallurgy and Processes, Marcel Dekker Inc. New York, NY, USA.
6. An, L.H., Cai, Y., Liu, W. et al. (2012) Effect of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy sheet by thermomechanical treatment. Trans. Nonferr. Met. Soc. China., 22, 370-375. https://doi.org/10.1016/S1003-6326(12)61733-6
7. Lu, Y., Wang, J., Li, X. et al. (2018) Effects of pre-deformation on the microstructures and corrosion behavior of 2219 aluminum alloys. Mater. Sci. Eng. A, 723, 204-211. https://doi.org/10.1016/j.msea.2018.03.041
8. Sobih, M., Elseddig, Z., Almazy, K., Sallam, M. (2016) Experimental Evaluation and Characterization of Electron Beam Welding of 2219 Al-Alloy. Indian Journal of Materials Science, Article ID 5671532. https://doi.org/10.1155/2016/5671532
9. Huang, C., Kou, S. (2000) Partially melted zone in aluminum welds - Liquation mechanism and directional solidifi cation. Weld J., 79 (5), 113-120.
10. Huang, C., Kou, S. (2001) Partially melted zone in aluminum welds: solute segregation and mechanical behavior. Ibid, 80 (1), 9-17.
11. Huang, C., Kou, S. (2001) Partially melted zone in aluminum welds planar and cellular solidifi cation. Ibid, 80 (2), 46-53.
12. Srinivasa, Rao P., Sivadasan, K.G., Balasubramanian, P.K. (1996) Structure-property correlation on AA 2219 aluminium alloy weldments. Bull Mater Sci, 19 (3), 549-557. https://doi.org/10.1007/BF02744827
13. Poklyatsky, A.G., Chajka, A.A., Klochkov, I.N., Yavorskaya, M.R. (2009) Strength and structure of aluminium alloy welded joints made by friction stir and non-consumable electrode welding. The Paton Welding J., 9, 9-12.
14. Venkateswarlu, D. (2017) Analysing the friction stir welded joints of AA2219 Al-Cu alloy in diff erent heat-treatedstate. IOP Conf. Series: Mater Sci and Eng. Hyderabad, India, 1-2 June 2017. IOP Publishing. https://doi.org/10.1088/1757-899X/330/1/012074
15. Kang, J., Feng, Z.C., Frankel, G.S. et al. (2016) Friction stir welding of Al alloy 2219-T8: Part I - Evolution of precipitates and formation of abnormal Al2Cu agglomerates. Metall Mater Trans A, 47 (9), 4553-4565. https://doi.org/10.1007/s11661-016-3648-7
16. Kang, J., Feng, Z.C., Li, J.C. et al. (2016) Friction stir welding of Al alloy 2219-T8: Part II - mechanical and corrosion. Ibid, 47 (9), 4566-4577. https://doi.org/10.1007/s11661-016-3646-9
17. Kang, J., Liang, S., Wu, A. et al. (2017) Local liquation phenomenon and its eff ect on mechanical properties of joint in friction stir welded 2219 Al alloy. Acta Metall. Sin., 53(3), 358-368. https://doi.org/10.11900/0412.1961.2016.00311
18. Rivera, O.G., Allison, P.G., Brewer, L.N. et al. (2018) Infl uence of texture and grain refi nement on the mechanical behavior of AA2219 fabricated by high shear solid state material deposition. Mater. Sci. Eng. A, 724, 547-558. https://doi.org/10.1016/j.msea.2018.03.088
19. Kuchuk-Yatsenko, S.I. (1992) Flash butt welding. Kiev, Naukova Dumka [in Russian].
20. Kuchuk-Yatsenko, S.I., Chvertko, P.N., Semyonov, L.A. et al. (2010) Peculiarities of fl ash butt welding of high-strength aluminium alloy 2219. The Paton Welding J., 3, 9-12.

Advertising in this issue: