TPWJ, 2019, #9, 2-7 pages
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #9, 2019 (October)
Microstructure of VT20 titanium alloys produced by the method of layer-by-layer electron beam fusion using domestic powder materials
V.M. Nesterenkov1, V.A. Matviichuk1, M.O. Rusynik1, T.B. Yanko2 and A.E. Dmitrenko3
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
PJSC «Titanium Institute»
180 Soborny Prosp., 69035, Ukraine. E-mail: email@example.com
NSC «Kharkov Institute of Physics and Technology»
1 Akademicheskaya Str., 61108, Kharkov, Ukraine. E-mail: firstname.lastname@example.org
Samples of products of domestic nonspherical powders of VT-20 titanium alloy were produced by the method of electron beam 3D fusion. Microstructure of deposited metal is pore-free, finely dispersed and uniform over the entire surface of the section. It is acicular a′-phase of titanium with a small content of b-phase. Sample microhardness is from HV
3960 to HV
4150 MPa. Uniform distribution of alloying elements and decreased content of aluminium due to its volatility in deposition was noted. Presence of insignificant porosity and increased roughness on part edges was detected. The methods of their elimination were obtained. 10 Ref., 1 Table, 11 Figures.
Keywords: additive technologies, titanium alloy, electron beam, surfacing, structure, microhardness
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