2020 №05 (04) DOI of Article
2020 №05 (06)

The Paton Welding Journal 2020 #05
The Paton Welding Journal, 2020, #5, 29-33 pages

Microstructure of titanium alloys produced by the method of layer-by-layer electron beam surfacing using the wire of grade Ti6Al4V

V.M. Nesterenkov, M.O. Rusynyk, O.M. Berdnikova, V.A. Matviichuk and V.R. Strashko

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail:

The specimens of products of titanium alloy of various shapes using the wire of grade Ti6Al4V were produced by electron beam surfacing. In the deposited layers no defects were detected. In the course of the work, the investigations of microstructure, phase composition and mechanical properties of the specimens were carried out. For the deposited metal, the structure consisting mainly of lamellar-acicular ɑ’-phase is typical. The structure contains a small amount of β-phase, which lies in the form of thin interlayers layers between the acicular precipitations of αʹ-phase. It is not detected using the optical microscope, however can be detected applying electron microscopy and X-ray examinations. The microstructure of the deposited metal is mostly equilibrium and granular, gradient in sizes and microhardness. The microhardness of the boundary zones differs from the microhardness of the grain matrix, which may be associated with the difference in the content of alloying elements. Towards the top of the built specimen, the hardness decreases slightly. 9 Ref., 1 Table, 9 Figures.
Keywords: additive technologies, electron beam gun, electron beam surfacing, titanium alloy, metallography, microstructure, microhardness

Received 02.04.2020


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