SINGLE-SHOT EXPLOSIVE WELDING TECHNIQUE FOR THE FABRICATION OF MULTILAYERED METAL BASE COMPOSITES - EFFECT OF WELDING PARAMETERS LEADING TOOPTIMUM BONDING CONDITION

Multilayered metal base composites, mainly reinforced with steel sheet s, were fabricated using the single-shot explosive welding technique. Plate velocity change during the collision of multilayered plates with in small stand-off distances were analyzed using a one-dimensional fin ite-difference calculation, and the explosive welding parameters requi red for good bonding were investigated. Wavy interfaces, which suggest good bonding, were found in the case where properties, such as densit y, strength and melting point, of the bonded materials were not so dif ferent, but excess melting, poor bonding and planar interfacial struct ure were observed when the properties of the materials used were consi derably different. In the case where properties of the materials were fairly different, the weldable condition for good bonding was restrict ed. In this investigation, the way to regulate the explosive welding p arameters for good bonding and the welding mechanisms were discussed, and the mechanical properties of the composites measured by tensile te sts were investigated based on the rule of mixtures.