In this work, computational and experimental studies of the process of destruction of composite firing pin of porous alloy tungsten+nickel+iron+cobalt with 10 % content of titanium tungsten carbide at high-speed collision with steel barriers. It is shown that at ballistic tests with the broad range of speeds, significant exceeding of penetration of these firing pins in steel barriers in comparison with a mass-dimensional analog of the W-Ni-Fe-90 alloy. Based on the analysis of the crater morphology and structure of the striker fragments after penetration into the barrier, the assumption of implementation of the self-sharpenings mode of the firing pin, by means of localization of plastic deformation is made that leads to decrease in the effective area of interaction and increase in depth of penetration. Modification of a mathematical model of a porous ideal elasto-plastic solid with complex structure for the description of destruction with a possibility of accounting of the adiabatic shift mechanism in the course of interaction of the firing pin and a barrier is carried out.
A researches series aimed at studying the features and revealing the general laws of penetration of impactors made of composite material based on a porous tungsten + nickel + iron + cobalt alloy with the addition of highly hard refractory particles of tungsten carbide under various initial conditions was continued. In particular, the effect of the initial impactor temperature in the range from −50 to 50 °C on the process of penetration into the steel shield by the experimental and computational methods was studied. The absence of appreciable effect initial impactor temperature in this range for the penetration depth into the shield at impact velocities of 2500 m/s was revealed. The penetration is exceeded by 20% compared with the monolithic mass-size analog of the WNiFe-90 alloy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.