TITLE
WELDING OF TITANIUM AND ALUMINUM ALLOYS USING OSCILLATING ELECTRON BEAM AND NIOBIUM FILLER
AUTHOR(S)
Darina Kaisheva, Borislav Stoyanov, Vladimir Dunchev, Georgi Kotlarski, Maria Ormanova, Stefan Valkov
ABSTRACT
Titanium, aluminum and their alloys are increasingly used in a number of industries. Due to their very different thermo-physical parameters, obtaining a strong joint between them is rather difficult. Electron beam technology has been successfully applied to weld Ti/Ti alloys to Al/Al alloys. The aim of the present work is to investigate the influence of specific technological conditions, including the use of niobium filler, on the structure and mechanical properties of an electron beam welded joint of titanium alloy Ti6Al4V and aluminum alloy Al6082-T6. EBW was carried out at following technological conditions: accelerating voltage U=60 kV; beam current I b=25 mA; welding speed v=10 mm/s; section length of the along linear electron beam oscillation l=6 mm; oscillation frequency f=200 Hz. The Nb filler was deposited via magnetron sputtering method. The phase composition of the weld was obtained using X-ray diffraction (XRD). Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) analysis were used to investigate the structure of the welded joint. The Vickers microhardness in a line perpendicular to the weld seam in the middle depth was measured. The formation of intermetallic phases Ti3Al, TiAl, TiAl3 and NbAl3 was established, also proven by the measured high hardness, reaching 627 HV0.5.
DOI
PAGES
331-335
DOWNLOAD
https://unitechsp.tugab.bg/images/2023/7-FH/s17_p169_v1.pdf
How to cite this article:
Darina Kaisheva, Borislav Stoyanov, Vladimir Dunchev, Georgi Kotlarski, Maria Ormanova, Stefan Valkov, WELDING OF TITANIUM AND ALUMINUM ALLOYS USING OSCILLATING ELECTRON BEAM AND NIOBIUM FILLER, Proceedings of International Scientific Conference “UNITECH 2023” – Gabrovo, 331-335