Disadvantages of Laser Beam Welding -
(i) The major drawback to laser beam welds is the slow welding speeds (25 to 250 mm/min.) resulting from the pulse rates and puddle sizes at the fusion point.
(ii) Laser welding is limited to depths of approximately 1.5 mm and additional energy only tends to create gas voids and undercuts in the work.
(iii) Materials such as magnesium tend to vaporize and produce severe surface voids.
