Influence of flux agent composition in A-TIG welding Of Cu-ETP sheetsBušić, Matija (Avtor) Šolić, Sanja (Avtor) Tropša, Vlado (Avtor) Klobčar, Damjan (Avtor) A-TIG weldingCu-ETPactivating fluxsilicon dioxideDue to its high coefficient of thermal expansion and high thermal conductivity, TIG welding of copper and copper alloys is considered difficult and demanding. Activated TIG welding (A-TIG) has been widely researched as a welding method for obtaining deeper penetration on various metals. However, A-TIG welding of copper remains unexplored without known influence of flux substances, applied parameters and achieved mechanical properties in produced welds. Three substances were examined as single component fluxes in this work: Calcium oxide (CaO), Silicon dioxide (▫$SiO_2$▫) and Sodium carbonate (▫$Na_2CO_3$▫). Produced welds were characterized by visual inspection and macrostructural analysis, also bend testing and tensile strength testing were performed. Microstructure of the weld with optimal mechanical properties was analyzed by means of Field Emission Gun-Scanning Electron Microscope (FEG-SEM) and also the chemical characterization of the weld was made by means of Energy Dispersive Spectroscopy (EDS). The results showed that the most effective flux used was Silicon dioxide. A-TIG welding with ▫$SiO_2$▫ flux enabled good results in visual inspection, macrostructure analysis, band test and tensile strength test. However, oxide inclusions have been found in weld metal in significant percentage which could indicate the possible degradation of electrical conductivity of the Cu-ETP sheets.20242025-02-25 09:57:47Neznano167496UDK: 621.791ISSN pri članku: 2562-4571DOI: 10.11159/ijmmme.2024.002COBISS_ID: 227220995sl