Aluminum and its alloys are very popular in today's time because of the good ratio between strength and weight. Laser welding offers some advantages compared to other conventional material bonding processes, but remains a major challenge, as the reliability of laser welding of aluminum alloys is lower than for other industrial metals. In this paper, I examined the methods of laser welding of aluminum alloys using foreign and domestic sources. I also studied the problems that we face during the welding of aluminum alloys and frequent defects that affect the quality of the weld. In the following, I also listed the properties of aluminum alloys after the welding process. A big weakness is high thermal conductivity. Higher laser energy is also required than for other alloys. Another important problem in aluminum welding is its reflectivity, and the third important factor affecting the low weldability of aluminum is the low viscosity of the weld. When welding aluminum alloys, there may be various errors that reduce the quality of the weld. Large penetrations are difficult to achieve due to poor absorption capacity. There are occurances of oxidation of welds due to poor protection against gases, gas porosity due to caught gases during curing, and cracks due to high expansion coefficient. Generally speaking, there is very little information on the corrosion behavior of laser welds of aluminum alloys.
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