The Paton Welding Journal, 2022, #1, 22-25 pages
Electron beam welding of aluminium 1570 alloy and mechanical properties of its joints at cryogenic temperatures
V.V. Skryabinskyi1, V.M. Nesterenkov1, A.V. Mykytchyk2
1E.O. Paton Electric Welding Institute of the NASU.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: skriabinski.vv.555@gmail.com
2SE “International Center for Electron Beam Technologies
of the E.O. Paton Electric Welding Institute of the NASU.”
68 Antonovych Str., 03150, Kyiv, Ukraine
Abstract
The features of electron beam welding of the 1570 alloy were studied and mechanical properties of its welded joints in the
temperature range of 20‒293 K were investigated. It was found that during electron beam welding in the 1570 alloy, the width
of the heat-affected-zone does not exceed 4 mm from the fusion line, which is 4 times lower than in the AMg6N alloy. In the
weld, fusion zone and HAZ cracks, clusters of eutectic interlayers and other defects were not detected. The ultimate strength of
the joints of the 1570 alloy at a decrease in the test temperature from 293 to 20 K increases from 325 to 525 MPa. The yield limit
is also increased from 210 to 270 MPa, and the ductility changes slightly. At the same time, the impact toughness decreases
from 38 to 9 J/cm2. The strength coefficient of welded joints with a decrease in the test temperature from 293 to 20 K increases
from 0.85 to 0.95. In general, the 1570 alloy is well welded by electron beam and the method of electron beam welding can be
recommended in the manufacture of welded structures of rockets and spacecrafts.
Keywords: electron beam welding, aluminium alloy, mechanical properties, welded joints; cryogenic temperatures
Received: 29.10.2021
Accepted: 07.02.2022
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Suggested Citation
V.V. Skryabinskyi, V.M. Nesterenkov, A.V. Mykytchyk (2022) Electron beam welding of aluminium 1570 alloy and mechanical properties of its joints at cryogenic temperatures.
The Paton Welding J., 01, 22-25.