Effects of welding parameters on laser welding of aluminum alloys with filler wire

Two types of material, including 5A06 aluminum alloy with 1.2mm thickness and 5A90 aluminum-lithium alloy with 3mm thickness, were joined by laser welding with ER5356 filler wire. The effects of welding parameters (the distance between the laser and the filler wire, weld feed speed, laser power and welding speed) on welding appearance were researched. The results show that the good welding appearance can be obtained when the distance between the laser and the filler wire is controlled within a range, and the range is affected obviously by the welding speed. Meanwhile, the higher wire feed speed and greater wire feed speed range tend to appear when the thinner aluminum alloy sheet is welded. The effect of welding speed on welding appearance is larger than that of laser power. As the welding speed increases, the laser power increases in order to realize the two welding parameters match each other. Besides, during laser welding with filler wire on the condition of good welding appearance and complete-penetration