7075 Aluminum alloy welded by laser-TIG hybrid with homogeneous filler wire: Microstructure evaluation and molten pool behavior

•Laser-TIG hybrid welding by filling Al-Zn-Mg-Cu filler wire was applied to 7075 aluminum alloy sheets.•The ultimate tensile strength of the welded joint was reached approximately 80% of base metal.•Adding homogeneous welding wire could promote the precipitation of the η′ phase and improve the mechanical properties.