Single-shot explosive welding technique for the fabrication of multilayered metal base composites: effect of welding parameters leading to optimum bonding condition

Multilayered metal base composites, mainly reinforced with steel sheets, were fabricated using the single-shot explosive welding technique. Plate velocity change during the collision of multilayered plates within small stand-off distances were analyzed using a one-dimensional finite-difference calculation, and the explosive welding parameters required for good bonding were investigated. Wavy interfaces, which suggest good bonding, were found in the case where properties, such as density, strength and melting point, of the bonded materials were not so different, but excess melting, poor bonding and planar interfacial structure were observed when the properties of the materials used were considerably different. In the case where properties of the materials were fairly different, the weldable condition for good bonding was restricted. In this investigation, the way to regulate the explosive welding parameters for good bonding and the welding mechanisms were discussed, and the mechanical properties of the composites measured by tensile tests were investigated based on the rule of mixtures.