The Reactivity And Penetration Performance Of Ni-Al And Cu-Ni-Al Reactive Shaped Charge Liner

Reactive structural materials(RSM)have many unique military applications due to their mechanical and energy properties.They are good coupling carriers for kinetic energy and chemical energy.The problem of penetrating damage of the reactive liner has important significance because it involves if the reactive materials achieve the internal energy release of the target.In this paper,the reactivity and penetration performance of nickel-aluminum(Ni-Al)and copper-nickel-aluminum(Cu-Ni-Al)reactive structural materials as shaped charge liner materials were studied in macroscopic and microscopic.Firstly,Ni-Al and Cu-Ni-Al reactive liners were prepared by the non-sintering powder metallurgy method and the penetration experiments were carried out on 45# steel.The results showed that the Cu-Ni-Al reactive liner had a stronger penetration ability and the penetration depth increase by 42%.Secondly,the energy spectrum analysis of the residual jet in the crater was carried out.The results showed that the energy release of Ni-Al-based reactive jet was mainly intermetallic.By comparing the Fe element content in the residual jet,it was concluded that Cu reduced the interaction between the reactive jet and the target,thereby enhancing the damage effect.Finally,the recovered steel target crater walls were observed and analyzed by optical microscopy,scanning electron microscopy,energy dispersive spectroscopy and Vickers microhardness.The results showed that the target penetrated by the Ni-Al and Cu-Ni-Al reactive jets had a partitioned microstructure at the head and tail of the crater walls,which were divided into residual jet zone,white zone,deformation zone and matrix.The jet rapidly decayed with the penetration process,but the white zone(a mixture of martensite and austenite)was more prominent in the tail,and the microhardness of the tail was much higher than that of the head.In this paper,the damage mechanism of Ni-Al reactive jet penetrating into semi-infinite target was analyzed,and the reason for the penetration performance of Cu-enhanced Ni-Al reaction material was explained from the perspective of penetration and release energy.This can provide experimental data and technical support for the application of RSM to the shaped charge liners.