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Commercially pure titanium and 304 stainless steel were welded using explosive welding technique. The joints were evaluated using optical microscope, scanning electron microscope, energy dispersive spectroscopy and X-ray diffraction. The study indicates the formation of characteristic interfacial oscillations with vortices at high energetic conditions. The reacted products of the vortices have been identified as FeTi and Fe 2 Ti intermetallics by X-ray diffraction. Increase in the kinetic energy spent at the interface cause the volume of vortices to increase. Smooth wavy and flat topography has been obtained for thin flyer plates due to less kinetic energy loss. The results demonstrate a good welding interface for multi-layered welding using a thin stainless steel interlayer, as the kinetic energy dissipation at the interface was less.

The self-propagating high-temperature synthesis (SHS) process as illustrated in Fig. 1. A heat resistance sheet of 1 mm thickhas been applied to formation of composites consisting of ness, which was composed mainly of long fiberlike crysotile TiB 2 and TiN ceramics synthesized simultaneously. Ti, B, (Nippon Valqua Industry Co., Ltd., Tokyo, Japan), was inserted and BN powders were used as raw materials. The SHS between the powder mixture and the steel container in order to reaction was initiated by a tungsten heating coil. XRD keep the powder in contact with itself. The combustion syntheexperiments confirmed that the reaction was complete, and sis reaction was initiated by passing electric current at about that only TiB 2 and TiN phases were detected. Microstruc-0.5 kVA for 5 s under atmospheric pressure and at room tempertural observations revealed that both TiN and TiB 2 crystal ature through a tungsten coil with a wire diameter of 0.45 mm grains had small sizes of less than 1 m in the composites which was placed at the top of the container. The combustion with high TiN content. Inhibition of grain growth can be wave traveled to the bottom of the container. The velocity of attributed to the pinning effect of TiN grains. Excellent the combustion wave was measured by the following procedure. corrosion resistance was obtained for HCl reagent.

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