Automatic Welding, 2022, №01



2022 №01 (03)

DOI of Article 10.37434/as2022.01.04

2022 №01 (05)

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Avtomaticheskaya Svarka (Automatic Welding), #1, 2022, pp. 26-32

Influence of time of existence of molten pool in electron radiation processes on the level of evaporation of elements with a high vapor tension

N.V. Piskun, E.L. Vrzhizhevsky, V.A. Kostin, T.G. Taranova, I.L. Bogaichuk, І.І. Statkevich

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

The intermetallic Ti – 44Al – 5Nb – 3Cr – 1.5Zr alloy (at.%), developed and smelted at the E.O. Paton Electric Welding Institute of the NAS of Ukraine, was studied. The processes of evaporation of elements with a high vapor tension, such as aluminum and chromium for two electron beam processes: melting and welding were studied. It was experimentally proven and confirmed by investigations that the use of directional crystallization by electron beam melting, which takes place in deep vacuum conditions, does not allow providing uniformity of structure along the length of the ingot, which is associated with evaporation of elements with a high vapor tension, such as aluminum and chromium. It was found that during electron beam welding of samples of intermetallic Ti – 44Al – 5Nb – 3Cr – 1.5Zr alloy (at.%), cracks appeared, but, as was proved by X-ray spectral studies, evaporation of elements does not occur. The parameters of these two processes were compared and it is shown that the level of evaporation of elements with a high vapor tension in electron beam processes is influenced by the time of existence of the material in a liquid state and the size of the molten zone. 17 Ref., 1 Tabl., 9 Fig.
Keywords: intermetallic alloy of TiAl system, electron beam melting, electron beam welding, evaporation, elements with a high vapor tension, molten zone, crystallization time


Received: 25.10.2021

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