Avtomaticheskaya Svarka (Automatic Welding), # 7, 2018, pp. 12-17
Electron beam welding and heat treatment of welded joints
of high-strength pseudo-β-titanium alloy VT19
S.V. Akhonin, V.Yu. Belous, R.V. Selin, E.L. Vrzhyzhevsky, I.K. Petrichenko
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine.
Titanium pseudo-β alloys have high strength reaching 1200-1400 MPa in aged state as well as high fabricability in comparison with alloys with pseudo-α or (α+β) structure. Such advantages of pseudo-β-titanium alloys, typical representative of which is high-alloy VT19, make this class of titanium alloys perspective for application in new equipment and during modernization of existing one. The paper has studied the effect of mode of electron beam welding, modes of pre-heating and local heat treatment as well as furnace annealing on properties of welded joints of pseudo-β-titanium alloy VT19 produced by electron beam welding. Variation of rate of electron beam welding of alloy VT19 does not allow changing relation between α- and β-phases within the significant limits in weld metal and heat affected zone. Electron beam welding in combination with pre-heating allows regulating the relation between α- and β-phases in welded joint metal and reduce content of β-phase in weld metal of alloy VT19 from 91 to 53% as well as rise strength of welded joints from 876 to 937 MPa. 11 Ref. , 2 Tabl., 6 Fig.
titanium, titanium alloys, pseudo-β-titanium alloys, electron beam welding, structure, properties, local heat treatment, annealing, strength
1. Kablov, E.N. (2012) Strategic directions of development of materials and technologies of their recycling from the period up to 2030. Materialy i Tekhnologii, S, 7–17 [in Russian].
2. Khorev, A.I. (2012) titanium super alloy VT19. Tekhnologiya Mashinostr., 6, 5–8 [in Russian].
3. Gurevich, S.M., Zamkov, V.N., Blashchuk, V.E. et al. (1986) Metallurgy and technology of welding of titanium and its alloys. Kiev, Naukova Dumka [in Russian].
4. Lyasotskaya, V.S., Lysenkov, Yu.T., Biryukov, I.M. et al. (1981) Improvement of properties of welded joints of VT9 alloys by local electron beam heat treatment. Proizvodstvo, 11, 19–20.
5. Lyasotskaya, V.S., Lysenkov, Yu.T., Gerasimenko, A.V. et al. (1985) Influence of local heat treatment on structure and properties of welded joints of VT6ch alloy. Promyshlennost, 11, 57–59 [in Russian].
6. Vrzhizhevsky, E.L., Sabokar, V.K., Akhonin, S.V. et al. (2013) Influence of local heat treatment at EBW of titanium alloys with silicide strengthening on mechanical properties of weld metal. The Paton Welding J., 2, 20–23.
7. Akhonin, S.V., Belous, V.Yu., Selin, R.V. et al. (2015) Structure and properties of EB- and TIG-welded joints of high-strength two-phase titanium alloys. Ibid., 8, 14–17. https://doi.org/10.15407/tpwj2015.08.03
8. Khorev, A.I. (2009) Development of structural titanium alloys for manufacture of components of aerospace engineering. Proizvodstvo, 3, 13–23 [in Russian].
9. Gavze, A.L., Petrova, E.N., Chusov, S.Y., Yankov, V.P. (2009) Investigation of properties of titanium alloys with mechanically stable beta-structure for body armor application. Techniczne Wyboby Wlokiennicze, 17(2/3), 54–57.
10. Popov, A.A., Illarionov, A.G., Oleneva, O.A. (2010) Structure and properties of welded joints from high titanium alloy after heat treatment. Metallovedenie i Termich. Obrab. Metallov, 10, 23–27 [in Russian].
11. Luetjering, G., Albrecht, J. (eds) (2003) Ti-2003 Science and Tecnology. In: of the 10th World Conf. on Titanium (13–18 July 2003, Hamburg, Germany), 385, 2643, 3035.