The Paton Welding Journal, 2007, №02

2007 №02 (01)

2007 №02 (03)

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The Paton Welding Journal, 2007, #2, 7-8 pages

Hot cracking resistance of Al–Zn–Mg–Cu system alloys in argon-arc welding

A.Ya. Ishchenko, V.E. Fedorchuk, A.G. Poklyatsky, M.R. Yavorskaya

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Resistance of high-strength alloys of Al–Zn–Mg–Cu system to high-temperature cracking in argon-arc welding was studied, depending on the total amount and ratio of the base alloying elements (zinc, magnesium, copper) in them, and also on the presence of scandium additives in the base and filler materials. It is shown that increase of the total amount of base alloying elements in the alloys and addition of 0.3 % Sc to the weld metal allow considerably increasing the hot cracking resistance of welded joints.
Keywords: argon-arc welding, high-strength aluminium alloys, alloying, scandium, weld metal, hot brittleness

References

1. Fridlyander, I.N. (2003) High-strength aluminium alloys with zinc, magnesium and copper. Metallovedenie i Term. Obrab. Metallov, 9, 11–13.
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Suggested Citation

A.Ya. Ishchenko, V.E. Fedorchuk, A.G. Poklyatsky, M.R. Yavorskaya (2007) Hot cracking resistance of Al–Zn–Mg–Cu system alloys in argon-arc welding. The Paton Welding J., 02, 7-8.

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