爆炸与冲击2026，Vol.46Issue(3)：51-69,19.DOI:10.11883/bzycj-2025-0144
CoCrFeNiCux高熵合金爆炸成型弹丸药型罩结构的优化与毁伤效能
Optimization of structural design and damage efficacy for CoCrFeNiCux high-entropy alloy liners in explosively formed projectiles
摘要
Abstract
High-entropy alloys (HEAs),as a novel class of high-performance metallic materials,have demonstrated considerable potential in the fields of damage and penetration mechanics. This study investigates the application of CoCrFeNiCux HEAs as liner materials for explosively formed projectiles (EFPs),with the objective of enhancing EFP formation quality and damage efficacy through structural optimization of the liner. Quasi-static and dynamic tensile tests were conducted to characterize the mechanical properties of the HEAs with different copper contents (x=0 and x=1). The experimental data were used to fit parameters for the Johnson-Cook (J-C) constitutive model. The results indicate that both HEA compositions exhibit outstanding plasticity,ductility,and positive strain-rate sensitivity,with dynamic yield strength increasing significantly under high strain-rate loading. Numerical simulations were performed using the nonlinear finite element software AUTODYN to compare the EFP formation processes between conventional copper liners and the proposed HEA liners. The simulations revealed that the superior strength of the HEAs impeded the complete closure of the projectile tail when using a conventional uniform wall thickness liner geometry. To address this issue,a uniform variable wall thickness design was implemented for the HEA liners. This optimization successfully improved the formed EFPs,resulting in length-to-diameter ratios of 2.0 for x=0 and 2.5 for x=1,with velocities reaching 2 260 m/s and 2 357 m/s,respectively. The penetration performance of the optimized HEA EFPs was validated against two target types. The projectiles achieved penetration depths of 37.8 mm (x=0) and 41.5 mm (x=1) into 100-mm-thick 4340 steel targets,and 287.6 mm and 303.7 mm into 1 000-mm-thick C35 concrete targets. The crater diameters exceeded 260％ of the charge caliber,confirming excellent penetration and damage capabilities. This work demonstrates that structural optimization of CoCrFeNiCux HEA liners significantly enhances EFP formation quality and penetration performance,providing a theoretical foundation and a novel strategy for the design of high-efficiency damage warheads.关键词
高熵合金/爆炸成型弹丸/药型罩/结构优化/侵彻性能Key words
high-entropy alloy/explosively formed projectile/liner/structural optimization/penetration performance分类
数理科学引用本文复制引用
李镕辛,陈嘉琳,王瑞琪,宋佳星,黄骏逸,张阿震,吴家祥,李裕春..CoCrFeNiCux高熵合金爆炸成型弹丸药型罩结构的优化与毁伤效能[J].爆炸与冲击,2026,46(3):51-69,19.基金项目
陕西省自然科学基础研究计划青年项目(2025JC-YBQN-103) （2025JC-YBQN-103）
