2023 №03 (05) DOI of Article
2023 №03 (07)

Electrometallurgy Today 2023 #03
Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2023, #3, 40-47 pages

Influence of structure-phase composition of titanium alloys doped by niobium and silicon, on mechanical characteristics of their welded joints

L.I. Markashova , S.G. Hryhorenko, O.M. Berdnikova, S.V. Akhonin, O.S. Kushnaryova, T.O. Alekseenko, E.V. Polovetskyi

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

Results of detailed investigations by the method of transmission electron microscopy are presented, and evaluation was performed in the system of chemical composition→structure→properties of welded joints produced by electron beam welding of experimental high-temperature multicomponent titanium alloys doped by niobium and silicon. It was found that in order to eliminate the gradient by strength and fracture toughness, it is necessary to ensure formation of a homogeneous dispersed platelike structure at uniform distribution of the density of dislocations and phase precipitate particles. Such a structure will ensure a high level of mechanical properties and crack resistance of metal in titanium alloy welded joints. 20 Ref., 2 Tabl., 6 Fig.
Keywords: titanium alloys, chemical composition, welded joints, structural-phase composition, dislocation structure, substructure, phase formation, stoichiometric composition, strengthening, local internal stresses, crack resistance

Received 14.07.2023


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