| 2007 №08 (02) | 2007 №08 (04) |
The Paton Welding Journal, 2007, #8, 12-17 pages
Influence of the method of melting titanium alloys on their weldability and service characteristics
S.V. Akhonin, V.F. Topolsky, I.K. Petrichenko, E.L. Vrzhizhevsky, R.N. Mishchenko
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
The influence of the method of titanium alloy production by the process of vacuum-arc remelting or electron beam cold hearth melting on the metal performance and its weldability is considered in the case of medium-alloyed titanium alloy VT6. It is shown that the difference in the strength and ductility properties is negligible. It is established that irrespective of the production process, the fracture toughness KIc of the base metal is on the same level, and fracture toughness of the metal of EB welds is higher than that of the base metal in both cases. The characteristic of cyclic crack resistance of both the base metal of VT6 titanium alloy produced by different melting processes and of its welded joints is shown to be on the same level.
Keywords: arc welding, titanium alloys, vacuum-arc remelting, electron beam melting, weldability, welding modes, structure, mechanical properties, crack resistance
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