Abstract
AZ31B Magnesium alloy plates were successfully joined by using alternating current pulsed Metal inert gas welding (AC p-MIGW) with AZ61 Magnesium alloy wire as the filler metal. The macrostructure, tensile strength, micro hardness and corrosion rate of welded magnesium alloy joints were studied. Results showed that magnesium alloy plates could be successfully joined by pulsed MIG welding under specified process parameters. The average tensile strength of the joint was 81.34 N/mm2. The micro hardness was averagely about 67.62 HV. The joint was brittle fractured in the middle of weld zone. The corrosion rate of the welded joint was found to be 0.0112 mm/year.
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