Modeling of the impact process of the bullet core made of hard alloy with a high entropy FeNiCrMoW binder into an obstacle

DOI: 10.62564/M4-MV1940

Vitalii Mykhailichenko, Anatolii Minitskyi, Oleh Stepanov, Olexandra Yurkova, Serhii Nakonechnyi

National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»


In modern conditions, increasing the armor-piercing characteristics of small arms ammunition is an important task. One of the promising ways to solve this problem is to improve the composition of the composite materials from which bullets cores are made [1]. In order to reduce research costs and optimize the design of new products, simulation of product behavior in real conditions is widely used. During the study, a composite powder material of the tungsten carbide and high-entropy equimolar NiFeCrWMo alloy was obtained using the methods of mechanical alloying and vacuum sintering in the ratio of 90 wt. % and 10 wt. % respectively. To obtain a model of the behavior of the material under conditions of intense dynamic loads, a combination of the Johnson-Cook model, which describes the processes of deformation and destruction of the material, the equation of state of stress waves, which characterizes the speed of particles and the speed of stress waves during high-speed deformation, the shear modulus and Poisson's ratio was used. A material model was created using experimentally determined data, which can be used in other similar calculation works for modeling processes of various nature. The process of hitting an armor-piercing bullet into an armor plate was simulated using the Ansys 2020 R2 student edition software using the finite element method. For this purpose, models of the armor-piercing bullet and plates of the required thickness were created and the values of the material parameters were assigned to them. As a result of modeling, it was established that the core of the bullet made of tungsten carbide and high-entropy binder is almost not inferior in terms of strength characteristics to the core of the bullet made of tungsten carbide and cobalt and has similar parameters of penetration ability.

Keywords
High-entropy alloy, tungsten carbide, simulation, hard alloy.

Acknowledgments
Not provided

References
[1] Yurkova, O.A., Minitskyi, A.V., Nakonechnyi, S.O. et al. Investigation of the Influence of High Speed Sintering Regimes on the Structure and Properties of WC Based Carbide Composites with High Entropy Bonding, Journal of Superhard Materials, 2024, V. 46, P. 32–39.