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The morphology and structure of the weld interface in magnetic pulse welding of similar and dissimilar metals were investigated. The interface zone of dissimilar metal couples such as Al-Mg, was studied in comparison to Al-Al welds. It was found that intermetallic phases (IMP) of different compositions are created during welding of the Al-Mg couple by rapid solidification of a thin melted layer at the interface. According to the calculated energy balance of magnetic pulse welding (MPW), there is enough energy to melt a thin interfacial layer and create IMP. Intensive characterisation techniques were used, including the focused ion beam (FIB) method that was used to prepare a cross-section of the Al-Mg interface for TEM characterisation. It was established that the jet action plays an important role in the melting process at the bonding zone.

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