Abstract

  Explosive welding is a solid state process in which bond is produced by a high oblique impact of two plates with the controlled explosive charge. In this paper, the explosive welding of Ms90 brass flyer plate with the St14 steel base plate are considered by using the parallel set up geometry. From the practical viewpoint, various parameters such the stand-off distance, dynamic angle, type and amount of charge, etc. influence the quality of the welds. However, all of these parameters can be summarized as the parameters of dynamic angle and welding speed. There is a region in this diagram, known as welding window, which determines the acceptable bonding region. The welding window is important in determining the optimum welding parameters before performing any practical application reducing the time and cost. In this contribution, the welding window of Ms 90 brass and St 14 steel is drawn using the existent equations and the shapes of the interface of the various tests were analyzed by optical microscope. The micrographs show that the shape of the interface changes from straight to wavy interface and the grains located close to the interface are elongated along the explosive direction. Grains are more elongated along the explosive direction with the explosive charge. The depth of interface microstructure increases with the explosive charge. In this study, the simulation of explosive welding process was carried using the ABAQUS finite element software and the pressure distributions at the collision zones were obtained for all experiments.