Defects in Laser Remelting Layer of AZ91D Magnesium Alloy

The technology characteristic of magnesium alloy after laser remelting and the common defects in the solidifying layer were studied. The prime reasons which bring microstructure defection were discussed also. The results show that the primary defects in solidifying layer of AZ91D magnesium alloy are gas cavity,crack and inclusion. These defects can be avoided or decreased if only the technology parameters are selected in reason during remelting process.