Effects of laser power modulation on keyhole behavior and energy absorptivity for laser welding of magnesium alloy AZ31

Half-sandwich specimen of dissimilar metals used to compare the

Morphologies of transversal cross sections of laser welded AZ31 joints.

Effects of laser power modulation on keyhole behavior and energy absorptivity for laser welding of magnesium alloy AZ31

Experimental set up for laser oscillating welding.

Porosity area percent with increasing pulse time and peak power density

Dynamic images of keyhole opening and molten pool during laser lap

Applied sinusoidal laser power signal and the two different welding

Applied sinusoidal laser power signal and the two different welding

Macro-profiles of the surface and cross-sectional welds, (a) without

Experimental set up for laser oscillating welding.