Brief Review on Dissimilar Welding Using Cold Metal Transfer

Hybrid joint configuration nowadays has been an essential process for fabrication in both industrial and construction industry. However, the challenges in welding two varied materials need to consider both metal characteristics since the joint of the different metals from various properties cause the formation of intermetallic compounds (IMCs) layers can cause the failure. Various parameters (i.e; welding current, welding speed) and factors (i.e; materials' thickness and properties) need to be considered when joining two different metals using welding. Common methods use for joining two different metals are friction stir welding, laser welding, resistant spot welding and gas metal arc welding (GMAW). Cold metal transfer method (CMT) is new technique that recently applied for joining dissimilar metal weld especially for thin metals of 0.3∼2.0 mm. Major advantage of CMT is using low power and green technology process. This review provides explanation of common field which applying dissimilar metal welding and discuss the previous related researches with example of different materials being used. This including factors that need to be concerned to produce good welding joint and the current research using cold metal transfer for hybrid joint configuration.