Laser-tungsten inert gas hybrid welding of dissimilar metals AZ31B Mg alloys to Zn coated steel

► Successful joining Mg to Zn coated steel using laser-TIG hybrid welding. ► Metallurgical bonding was achieved at the Mg/Zn coated steel interface. ► Influence of laser power on joining Mg to Zn coated steel was investigated. ► Newly formed Fe3Al phase improved the interfacial bonding and joint strength. ► The role of Zn coating in joining Mg to steel was clarified.