Asynchronous deformation behavior of precipitation-hardened high-entropy alloys shaped charge liner under explosive loading

TY - JOUR

T1 - Asynchronous deformation behavior of precipitation-hardened high-entropy alloys shaped charge liner under explosive loading

AU - Wang, Xutao

AU - Wang, Benpeng

AU - Liu, Xudong

AU - Li, Tianxiang

AU - Zeng, Hanlin

AU - Wang, Liang

AU - Jin, Ke

AU - Xue, Yunfei

N1 - Publisher Copyright: © 2024

PY - 2025/1

Y1 - 2025/1

N2 - Precipitation-hardened high entropy alloys (PHEAs) are promising candidates for shaped charge liners (SCLs) due to their potential in obtaining good penetration depth and diameter. Deformation mechanism under explosive is the key to guiding the alloys microstructure, property optimization and shaped charge designing. In this study, the microstructural evolution and deformation mechanism of PHEA SCLs under explosive loading were systematically investigated. Under explosive loading, both the α2 and BCC matrix phases underwent dynamic recrystallization, transforming into fine equiaxed grains (∼10 μm). The BCC phase deformed earlier than the α2 phase, exhibiting a clearly asynchronous deformation behavior. This demonstrates that the α2 phase can effectively improve the deformation resistance upon detonation and further increase jet diameter. Moreover, the α2 can be retained under explosive conditions, which enables delaying the expansion of the adiabatic shear bands and further improving the jet continuity. Our results shed lights on developing new high-performance alloys and the related microstructure optimization for engineering applications in SCLs.

AB - Precipitation-hardened high entropy alloys (PHEAs) are promising candidates for shaped charge liners (SCLs) due to their potential in obtaining good penetration depth and diameter. Deformation mechanism under explosive is the key to guiding the alloys microstructure, property optimization and shaped charge designing. In this study, the microstructural evolution and deformation mechanism of PHEA SCLs under explosive loading were systematically investigated. Under explosive loading, both the α2 and BCC matrix phases underwent dynamic recrystallization, transforming into fine equiaxed grains (∼10 μm). The BCC phase deformed earlier than the α2 phase, exhibiting a clearly asynchronous deformation behavior. This demonstrates that the α2 phase can effectively improve the deformation resistance upon detonation and further increase jet diameter. Moreover, the α2 can be retained under explosive conditions, which enables delaying the expansion of the adiabatic shear bands and further improving the jet continuity. Our results shed lights on developing new high-performance alloys and the related microstructure optimization for engineering applications in SCLs.

KW - High entropy alloys

KW - Microstructure

KW - Shaped charge liner

KW - Ultra-high strain rate

UR - https://www.scopus.com/pages/publications/85208465115

U2 - 10.1016/j.intermet.2024.108555

DO - 10.1016/j.intermet.2024.108555

M3 - Article

AN - SCOPUS:85208465115

SN - 0966-9795

VL - 176

JO - Intermetallics

JF - Intermetallics

M1 - 108555

ER -