Experimental and numerical study on the explosive welding of niobium-steel

Abstract

The aim of this work is to study the use of explosive welding to produce Niobium-Steel composite plate, which is used in nuclear industry equipment material manufacturing. The welding parameters was determined by weldability window and numerical simulation was used to predict the wave shape of the welding interface. The morphology of the interface wave was observed by scanning electron microscope. Component measurement around interface waves. The experimental samples were investigeted using mechanical tests. The results show that the explosion parameters optimized by theory and numerical simulation can be used to obtain a niobium-steel composite plate with better welding quality. It can be proved that the welding quality is better by observing the interface wave and testing the mechanical properties, it can be seen that the melting zone of the welding interface is composed of niobium and steel by the composition analysis instrument. The morphology of the welding interface wave is consistent with the numerical simulation results, and the numerical simulation shows the changes of temperature, strain, and stress during the welding process.

The interface microstructure and phase constitution of Nb/316L composite plates fabricated by explosive welding

“…The results showed that the Nb-SS304 joining interface is featured by a wave structure with two vortices, and no obvious intermetallic compounds are formed at the joining interface. Wang and Li et al [16] performed explosive welding technologies on the joining of Nb and steel and found that the joining interface presented a waveform structure without no obvious defects. Among these welding technologies, the explosive welding technology shows excellent joining quality in the welding of Nb and other metals.…”

“…In Xu et al's study [15], the Nb-SS304 explosive welded interface presents a waveform structure with two vortices and formed elongated and fine equiaxed grain structures near the interface. Wang and Li et al [16] found that the niobium-steel explosive welded interface presented a waveform structure without no obvious defects. The elemental analysis results indicated that a 5-µm diffusion layer was formed at the Nb-steel joining interface.…”