Elevation of the Fatigue Resistance of the Joints of 7056-Т351 Aluminum Alloy Obtained by Electron-Beam Welding.

Autor:	Nesterenkov, V. М., Motrunich, S. І., Berdnikova, О. М., Klochkov, І. М., Polovetskyi, E. V.
Předmět:	ALUMINUM alloys WELDED joints ALUMINUM-zinc alloys WELDING IMPACT (Mechanics) ZINC powder ELECTRON beams
Zdroj:	Materials Science; May2021, Vol. 56 Issue 6, p830-836, 7p
Abstrakt:	We study welded joints of thermally hardened 7056-T351 aluminum alloy with elevated zinc content obtained by electron-beam welding (EBW) both in the intact state and after high-frequency mechanical impact treatment. It is shown that the process of EBW leads to the formation of a high-quality welded joint with high strength and fatigue-resistance characteristics. We determine the effective parameters of high-frequency mechanical impact treatment and analyze their influence on the microstructure, fracture behavior, and microhardness of the metal over the depth from the treated surface. In the course of hardening of the joint by high-frequency mechanical impact treatment, the grain structure becomes finer, the microhardness increases, and the character of fracture changes as a result of dispersion of elements of the microscopic topography of fracture surfaces. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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