The Paton Welding Journal, 2021, #10, 18-27 pages
Corrosion-mechanical resistance of 2219 alloy welded joints under simulated service conditions
L.I. Nyrkova1, T.M. Labur1, E.I. Shevtsov2, O.P. Nazarenko2 and A.V. Dorofeev2
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
SC «DB Pivdenne»
3 Kryvorizzka Str., 49008, Dnipro, Ukraine
In the work participated: S.O. Osadchuk, M.R. Yavorska, A.G. Poklyatskyi, V.E. Fedorchuk.
We studied the corrosion resistance, including local corrosion resistance, of welded joints of aluminium 2219 alloy, made by
nonconsumable electrode single-pass welding along (L) and across (T) the rolled metal heat-treated to the Т81 condition. It is
shown that resistance of welded joints of 2219 alloy to general and local corrosion in amyl and its vapors does not depend on
the direction of workpieces during welding. An increase in ductility and strength values of welded joint specimens was found
after soaking them in amyl and amyl vapors. The coefficient of welded joints strength after soaking in amyl rises from 0.65 up
to 0.67 in the longitudinal direction, and from 0.64 to 0.66 in the transverse direction. After soaking in amyl vapors, the strength
properties of the welded joint almost do not change: strength coefficient was the same in both orientation directions and it was
equal to 0.64. Fracture ran along the fusion line of the weld with the base metal, where melting of grain boundaries and their
thickening take place during the thermal cycle of welding at crystallization, as well as decomposition of copper over saturated
solid solution in aluminium, which is accompanied by precipitation and coagulation of the strengthening phases.
2219 aluminium alloy, welded joints, heat treatment, corrosion resistance, mechanical properties, microstructure,
mechanical fracture at tension
1. Rao, P.S., Sivadasan, K.G., Balasubramanian, P.K. (1996) Structure-property correlation on AA 2219 aluminium alloy weldments. Bulletin of Materials Science, 19 (3), 549-557. https://doi.org/10.1007/BF02744827
2. Li, H., Zou, J., Yao, J., Peng, H. (2017) The effect of TIG welding techniques on microstructure, properties and porosity of the welded joint of 2219 aluminum alloy. Journal of Alloys and Compounds, 727, 531-539. https://doi.org/10.1016/j.jallcom.2017.08.157
3. Zhang, D., Wang, G., Wu, A. et al. (2019) Study on the inconsistency in mechanical properties of 2219 aluminium alloy TIG-welded joints. Journal of Alloys and Compounds, 777, 1044-1053. https://doi.org/10.1016/j.jallcom.2018.10.182
4. Grilli, R., Baker, M.A., Castle, J.E. et al. (2010) Localized corrosion of a 2219 aluminium alloy exposed to a 3.5% NaCl solution. Corrosion Science, 52 (9), 2855-2866. https://doi.org/10.1016/j.corsci.2010.04.035
5. Zhang, D., Wu, A., Zhao, Y. et al. (2021). Effects of the Number of Welding Passes on Microstructure and Properties of 2219-C10S Aluminum Alloy TIG-Welded Joints. Journal of Materials Engineering and Performance, 5, 3537-3546. https://doi.org/10.1007/s11665-021-05655-x
6. Wan, Z., Meng, D., Zhao, Y. et al. (2021) Improvement on the tensile properties of 2219-T8 aluminum alloy TIG welding joint with weld geometry optimization. Journal of Manufacturing Processes, 67, 275-285. https://doi.org/10.1016/j.jmapro.2021.04.062
7. Niu, L.Q., Li, X.Y., Zhang, L. et al. (2017) Correlation between microstructure and mechanical properties of 2219-T8 aluminum alloy joints by VPTIG welding. Acta Metallurgica Sinica (English Letters), 30 (5) 438-446. https://doi.org/10.1007/s40195-016-0516-9
8. Zhang, D.K., Wang, G.Q., Wu, A.P. et al. (2019) Effects of Post-weld Heat Treatment on Microstructure, Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints. Acta Metallurgica Sinica (English Letters), 32 (6), 684-694. https://doi.org/10.1007/s40195-018-00869-w
9. Gupta, R.K., Panda, R., Mukhopadhyay, A.K. et al. (2015) Study of aluminum alloy AA2219 after heat treatment. Metal Science and Heat Treatment, 57 (5), 350-353. https://doi.org/10.1007/s11041-015-9888-0
10. Lu, Y., Wang, J., Li, X. et al. (2018) Effects of pre-deformation on the microstructures and corrosion behavior of 2219 aluminum alloys. Materials Science and Engineering: A, 723, 204-211. https://doi.org/10.1016/j.msea.2018.03.041
11. Chen, S., Li, F., Liu, Q. et al. (2020) Effect of Post-aging Heat Treatment on Strength and Local Corrosion Behavior of Ultrafine-Grained 2219 Al Alloy. Journal of Materials Engineering and Performance, 29 (5), 3420-3431. https://doi.org/10.1007/s11665-020-04818-6
12. Zhang, D., Li, Q., Zhao, Y. et al. (2018) Microstructure and mechanical properties of three-layer TIG-welded 2219 aluminum alloys with dissimilar heat treatments. Ibid, 27 (6), 2938-2948. https://doi.org/10.1007/s11665-018-3394-7
13. Zhu, Z.Y., Deng, C.Y., Wang, Y. et al. (2015) Effect of post weld heat treatment on the microstructure and corrosion behavior of AA2219 aluminum alloy joints welded by variable polarity tungsten inert gas welding. Materials & Design (1980-2015), 65, 1075-1082. https://doi.org/10.1016/j.matdes.2014.10.056
14. Peng, X.N., Qu, W.Q., Zhang, G.H. (2009) Influence of Welding Processes on Mechanical Properties of Aluminum Alloy 2219 [J]. Journal of Aeronautical Materials, 2, 57-60
15. Bai, J.Y., Yang, C.L., Lin, S.B. et al. (2016) Mechanical properties of 2219-Al components produced by additive manufacturing with TIG. The International Journal of Advanced Manufacturing Technology, 86 (1), 479-485. https://doi.org/10.1007/s00170-015-8168-x
16. Rao, S.K., Reddy, G.M., Rao, K.S. et al. (2005) Reasons for superior mechanical and corrosion properties of 2219 aluminum alloy electron beam welds. Materials characterization, 55 (4-5), 345-354. https://doi.org/10.1016/j.matchar.2005.07.006
17. АМS-QQ-А-250/30А. Specifications. Aluminium alloy 2219. Sheet and plate [in Ukrainian].
18. GOST 7512-82: Nondestructive testing. Welded joints. Radiography method [in Ukrainian].
19. GOST 9.908-85: Unified system of corrosion and ageing protection. Metals and alloys. Methods for determination of corrosion and corrosion resistance indices [in Russian]. 20. GOST 9.904-82: Unified system of corrosion and ageing protection. Aluminium alloys. Accelerated test method for exfoliating corrosion [in Russian].
21. GOST 9.021-74: Unified system of corrosion and ageing protection. Aluminium and aluminium alloys. Accelerated test method for intercrystalline corrosion [in Russian].
22. GOST 1497-84 (ISO 6892-84, СТ CMEA 471-88) Metals. Methods of tension test [in Russian].
23. GOST 9.502-82 (СТ CMEA 6194-88) Unified system of corrosion and ageing protection. Inhibitors of metals corrosion for aqueous systems. Methods of corrosion tests (with modifications Nos 1, 2) [in Russian].