Experimental conditions for fabrication of multilayered metal base composites by single-shot explosive welding

摘要

This paper describes an attempt to fabricate multilayered composites reinforced with steel sheets by single-shot explosive welding. The experimental conditions necessary to obtain moderate bonding at each interface were investigated on the basis of the collision velocity (V_P) and kinetic energy loss due to collision (ΔKE) calculated by finite-difference analysis. In the case of aluminium base composites reinforced with stainless steel sheets with the same thicknesses of multilayered plates, the amount of energy dissipated by collision (ΔKE) should be controlled within a specific range by changing the spacings between the plates. In the case of aluminium and titanium base composites reinforced with maraging steel sheets, moderate welding cannot be achieved for multilayered plates of the same thickness because of a large tensile strength difference between the components. To decrease the difference in ΔKE at each collision point, explosive welding should be performed with the mass per unit area of each metal plate as far as possible unified by appropriate adjustment of thickness. It is then possible to fabricate soundly bonded multi-layered composites.