Shock-induced energy release reaction characteristics of Nb17Zr33Ti17W33 high entropy alloy

Abstract

Nb17Zr33Ti17W33 high entropy alloy is a novel class of energetic structural material. In addition to exhibiting insensitivity and mechanical strength commensurate with inert metal materials, it demonstrates the capacity to release non-self-sustained chemical energy under high-speed dynamic load. In this study, the energy release characteristics of the Nb17Zr33Ti17W33 high-entropy alloy material under impact were investigated using the dynamic energy release test method, which involves ballistic gun-induced bullet-target interaction in a quasi-closed reaction vessel. The energy release process and governing laws of the impact event have been meticulously analyzed, resulting in the development of a comprehensive impact compression chemical energy release model. The direct ballistic tests and the recovered products revealed that Nb17Zr33Ti17W33 experienced chemical reactions during the impact loading, primarily the oxidation of the Zr element, which resulted in the release of significant chemical energy. This study elucidates the deformation response mechanism of Nb17Zr33Ti17W33 under high-speed impact loading, providing a crucial reference for further insights and applications of high-entropy alloy materials.