Effect of the initial parameters on the process of wave formation in explosive welding

Abstract

A character is t ic feature of joints obtained by explosive welding is the rather s t r ict regularity and periodicity of the residual deformation in the impact region, which gives the contact surfaces a wavy shape (Fig. i). served that the waves formed when metal plates collide promote the formation of a strong joint [2, 3]. The positive effect of wave formation in connection with explosive welding is evidently attributable to the following principal factors. 1. During wave formation most of the initial kinetic energy of the projected plate is converted not into compressive energy, but into energy of plastic wave flow, with subsequent conversion into heat. This prevents the development of tensile s t resses during unloading, which might destroy the joint, and the metal in the joint zone is strongly heated, which in most cases favors the formation of a strong bond. 2. Wave formation is accompanied by the formation of a zone of interpenetration of the surface layers of the metals, in which both welded components are simultaneously present. The existence of this zone is attributable to purely mechanical processes associated with wave formation.