Features of repair of welded structures of large thicknesses from titanium alloy VT6ch.

Sviridov A.V., Gribkov М.S.
UDC
621.791
DOI
10.18577/2307-6046-2021-0-11-34-43
Article PDF (Russian) (1.68 MB)
How to cite
Sviridov A.V., Gribkov М.S. Features of repair of welded structures of large thicknesses from titanium alloy VT6ch. // Proceedings of VIAM. 2021. No. 11. DOI: 10.18577/2307-6046-2021-0-11-34-43. URL: https://test.viam.ru/en/journal/2021/11/4
Keywords
electron beam welding, welding parameters, structure, mechanical properties, repair of welded joints, heat treatment.
Abstract

The technology of electron-beam welding (EBW) of structures of large thickness made of titanium alloy Ti–6Al–4V has been developed. A complex of metallographic studies of welded samples has been carried out. Tests to determine the mechanical characteristics of repair welded joints, that these joints made by EBW are equal in strength to the base material. The analysis of the level of residual stresses in various parts of the welded joint after repeated repair passes has been carried out. It was found that the subsequent vacuum annealing reduces the level of residual stresses in welded joints to 50 %. The analysis of the elemental composition showed that the elemental composition of the samples from the center of the weld to the base metal practically does not change for welding with the number of repeated passes up to 3.

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