STRUCTURE AND MECHANICAL PROPERTIES OF Cu/Al6082T6 JOINTS PRODUCED BY WELDING WITH SCANNING ELECTRON BEAM

Abstract

This study presents the results of the electron-beam welding of pure copper (Cu) and aluminum (Al6082T6) alloy. The effect of the beam power on the phase composition, structure, and microhardness of the welded joints was studied. The power of the electron beam was set to 2400 W, 2700 W, and 3000 W, respectively.The phase composition of the fabricated joints was investigated by X-ray diffraction (XRD). The microstructure and chemical composition were performed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX), respectively. The mechanical properties of the welded samples wereexamined by microhardness investigation. The results obtained for the microhardness are discussed concerning the applied technological conditions, defined by the power of the electron beam. Furthermore, the possible applications of the obtained welded joints of copper and aluminum Al6082T6 alloy are discussed in the different fields in modern industry.