The magnetic pulse welding of Al-A1050 to Mg alloys was successfully performed, and the structural–mechanical properties of the interfacial bonding layer produced between dissimilar metals were studied. The morphology of the interface layer has a typical wavy pattern with an average thickness of 20 μm. Compositional microanalysis showed that the composition of the interfacial layer is Al–50 at-Mg and is practically uniform, being a direct outcome of the local melting effect, intensive mixing of the melt and a rapid rate of solidification. The composition of the bonding layer corresponds to the Al supersaturated intermetallic β phase (Mg17Al12). The elastic modulus (and the hardness) of the interfacial layer was measured using the nanoindentation technique, and its value of 60·2±1·4 GPa is in good agreement with the value calculated from first principles in the literature (57·3 GPa) for the Mg17Al12 intermetallic phase.
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