Study on Damage Characteristics of Non-equimolar High Entropy Alloy under High-Speed Impact Conditionsalloy

Abstract To analyze the damage characteristics of high-entropy alloys (HEAs) under the coupling of kinetic and chemical energy, we conducted tests on fragment penetration through spaced target A combination of experimental and theoretical analyses was employed to study the damage characteristics and mechanisms of HEAs. The results indicate that, with an increase in impact velocity, the damage area caused by the fragments on both steel and aluminum targets gradually expands, and the energy release process becomes more prolonged. In the study of the damaging effects of HEA fragments on fuel tanks under high-speed impact conditions, the chemical energy of the HEA fragments is released, forming a wide-ranging high-temperature deflagration field, which rapidly ignites upon contact with oil-gas mixtures, resulting in large-area combustion. This, in turn, ignites the remaining kerosene inside the fuel tanks and elucidates the mechanism of fuel tank damage by HEA fragments. The findings demonstrate that the non-equimolar ratio Zr 42 Ti 15 Nb 20 Ta 20 Al 3 (at.%) high-entropy alloy possesses not only excellent penetration capabilities but also superior impact energy release potential, making it a promising candidate for use as an energetic structural material (ESM).