2012 №07 (03) 2012 №07 (05)

The Paton Welding Journal 2012 #07
TPWJ, 2012, #7, 15-18 pages

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 7, 2012 (July)
Pages                      15-18

1H.V. Karpenko Physico-Mechanical Institute, NASU, Lvov, Ukraine
2A.A. Baikov Institute of Metallurgy and Materials Science, RAS, Moscow, Russia
The peculiarities of microstructure and distribution of microhardness of weld and heat-affected zone metal of welded joints of 1201-T alloy, produced using electron beam welding at different values of heat input, were studied. Using plotted temperature fields the running of phase transformations occurred in welding was analyzed. It was established that due to change of cooling rate across the thickness of plates the microstructure of near-weld zone in upper and lower parts of welded joint were considerably different. The increase of heat input of welding facilitates recrystallization processes which leads to increase of heat-affected zone.
Keywords: electron beam welding, aluminium alloy, heat-affected zone, weakening, temperature field, structure and mechanical heterogeneity, microstructure
Received:                28.11.11
Published:               28.07.12
1. Ishchenko, A.Ya. (2004) Specifics in application of aluminium high-strength alloys for welded structures. The Paton Welding J., 9, 15-25.
2. Ishchenko, A.Ya. (2007) Welding of aluminium alloys (directions of research conducted at PWI). Ibid., 11, 6-9.
3. Paton, B.E., Bondarev, A.A. (2004) State-of-the-art and advanced technologies of electron beam welding of structures. Ibid., 11, 20-27.
4. Nikiforov, G.D. (1972) Metallurgy of fusion welding of aluminium alloys. Moscow: Mashinostroenie.
5. Skalsky, V.R., Sergienko, O.M., Golaski, L. (1999) Generation of acoustic emission by cracks propagated in welded joints. Tekhn. Diagnostika i Nerazrush. Kontrol, 4, 23-31.
6. Skalsky, V.R., Andrejkiv, O.E. (2006) Assessment of volume damage of materials by acoustic emission method. Lviv: I. Franko Lviv NU.
7. Skalsky, V.R. (2001) Procedure of assessment of defect formation in alloys D16-T and 1201-T by acoustic emission method. Mashynoznavstvo, 3, 13-18.
8. Rabkin, D.M. (1986) Metallurgy of fusion welding of aluminium and its alloys. Kiev: Naukova Dumka.
9. Rabkin, D.M., Lozovskaya, A.V., Sklabinskaya, I.E. (1992) Metals science of aluminium and its alloys. Kiev: Naukova Dumka.
10. Ishchenko, A.Ya., Lozovskaya, A.V. (1980) Kinetics of transformations in welding of heat-hardened aluminium alloy 1201. Avtomatich. Svarka, 1, 29-32.
11. Lozovskaya, A.V., Chajka, A.A., Bondarev, A.A. et al. (2001) Softening of high-strength aluminium alloys in different fusion welding processes. The Paton Welding J., 3, 13-17.
12. Bondarev, A.A., Lozovskaya, A.V., Ishchenko, A.Ya. et al. (1974) Specifics of electron beam welding of alloy 1201. Avtomatich. Svarka, 2, 20-22.
13. Malarvizhi, S., Alasubramanian, V. (2011) Effect of welding processes on AA2219 aluminium alloy joint properties. Transact. of Nonferrous Metals Soc. of China, 21(5), 962-973.
14. Frolov, V.V. (2003) Arc welding of aluminium. Kharkov: Tekhnologiya.
15. Malarvizhi, S., Alasubramanian, V. (2010) Effects of welding processes and post-weld aging treatment on fatigue behavior of AA2219 aluminium alloy joints. J. Mat. Eng. and Performance, 20(3), 359-367.
16. Tosto, S., Nenci, F., Hu, J. (1996) Microstructure and properties of electron beam welded and post-welded 2219 aluminum alloy. Mat. Sci. and Technol., 12, 323-328.
17. Alapati, R., Dwivedi, D.K. (2009) Microstructure and hardness of Al-Cu alloy (A2218) welded joints produced by GTAW. The Paton Welding J., 4, 21-26.
18. Ishchenko, A.Ya., Lozovskaya, A.V., Sklabinskaya, I.E. (2001) Physical simulation of heat processes in HAZ metal during welding aluminium-lithium alloys. Ibid., 9, 4-7.
19. Skalsky, V.R., Lyasota, I.M. (2010) Estimation of the heat-affected zone for the electron-beam welding of plates. Mat. Sci., 46(1), 115-123.
20. Rykalin, N.N. (1951) Calculations of thermal processes in welding. Moscow: Mashinostroenie.
21. Dilthey, U. (2005) Schweisstechnische Fertigungsverfahren 2. Verhalten der Werkstoffe beim Schweissen. Vol.XXII. Springer.
22. Bondarev, A.A., Golikov, V.N., Anisimov, Yu.I. (1987) Resistance to brittle fracture of electron beam welded joints of aluminium alloy 1201. Avtomatich. Svarka, 3, 6-7.
23. Labur, T.M., Ishchenko, A.Ya., Taranova, T.G. (1991) Resistance to fracture of welded joints of high-strength aluminium alloys 1151 and 1201. Ibid., 6, 39-41.