Materials Science Forum, Vol.437-4, 261-264, 2003
A modified explosive welding technique using regulated underwater shock wave
A novel explosive welding technique to weld multilayered metal plates and other difficult-to-weld material combinations by the application of underwater shock waves have been reported earlier by some of the authors of this paper. This investigation presents a modified weld set-up to obtain explosive clads uniformly welded. An inclined set-up is essential as a high explosive (detonation velocity = 7 km/s) was employed. However, a detrimental variation of collision velocity in the vertical direction at different horizontal positions occurs because of the fixed thickness of the explosive layer under the inclined set-up. In the present investigation the thickness of the explosive layer is gradually increased from the detonator end to the non-detonator end of the weld set up. This gradual increase in thickness, and therefore the energy supplied to the flyer plate, balances the dissipation of energy in the water medium towards the non-detonator end. The modified method is found to yield good interfacial morphology with uniform wavy structure.
Keywords:controlled shock wave;explosive materials processing;explosive welding;underwater shock waves