2011•Advanced materials researchOpen access

Analysis of Characteristics of Mg Alloy Welded Joint by Laser Welding

Hong Jian Xiu, Jun Liu, Jun Dong, Ping Xu

Abstract

The microstructure, the regular and mechanism of various parameters on formation of weld bead of Mg alloy AMCa403 using a laser welding were investigated. The results show that sound welds without major defects can be produced. Two welding modes of deep penetration welding, heat conduction welding were found, and heat input was found to be the main factor for welding mode and shape. The microstructure of weld metal is significantly finer than the base metal. At the same power, with the increase of welding speed, the microstructure of weld metal is much finer.

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Key concepts: Welding, Materials science, Laser beam welding, Heat-affected zone, Microstructure, Metallurgy, Electric resistance welding, Filler metal