The Paton Welding Journal, 2021, #2, 2-7 pages
Features of formation of structure of coaxial joints of copper and aluminium in explosion welding with vacuuming of welding gap
M.O. Pashchin, P.S. Shlonskyi, А.G. Bryzgalin, O.S. Kushnaryova and N.L. Todorovych
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
The results of the study of intermetallics formation in explosion welding of copper and aluminium coaxial joints depending
on the length of the joint and the environment in the welding gap (air and vacuum) are presented. The metallographic
analysis of the boundary of the coaxial joint in copper-aluminium rods showed that at different areas of bimetallic
rods in welding under different conditions both in air as well as in the presence of vacuum in the gap, intermetallic
layers of different thickness are formed. The growth, observed in the volume fraction and thickness of the intermetallic
layer in the joint area, as it moves away from the initiation point, regardless of the environment in the welding gap (air
or vacuum), is natural and is explained by the channel effect in explosion welding. 14 Ref., 1 Table, 9 Figures.
explosion welding, channel effect, intermetallics, contact point speed
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