The Paton Welding Journal, 2023, №07



2023 №07 (03)

DOI of Article 10.37434/tpwj2023.07.04

2023 №07 (05)

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The Paton Welding Journal, 2023, #7, 31-36 pages

Influence of electron beam focusing current on geometry and microstructure of welded joints of aluminium 2219 alloy

M.O. Rusynyk¹, V.M. Nesterenkov¹, M. Sahul², I.M. Klochkov¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Czech Technical University in Prague, Faculty of Mechanical Engineering, Technická 4, 160 00 Prague 6, Czech Republic

Abstract
The impact of the focusing current of electron beam welding on the nature of the formation of welded joints of aluminium 2219 alloy was investigated. It was established that when the focusing current increases, the width of the facial weld grows. And the width of the weld root depends on the real position of the electron beam focus relative to a sharp focus on the metal surface (639 mA). Dependence of the focusing current on the distribution of copper and aluminium in the weld metal was revealed. An increase in the focusing current from 629 to 649 mA led to an increase in the copper content in the interdendritic regions. Energy dispersion X-ray analysis showed that the microstructure of the welded joint produced at the focusing current of 629 mA, consists of equiaxial dendrites with embedded small particles, pores and α+θ-Al2Cu eutectic, separated in the interdendritic regions. 9 Ref., 4 Tabl., 8 Fig.
Keywords: electron beam welding, assembly and welding equipment, aluminium alloy, energy dispersive X-ray spectroscopy, segregation

Received: 25.05.2023
Accepted: 06.09.2023

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