Deformation and failure mechanism of flat-nosed TC4 titanium alloy projectile penetrating steel target at different velocities
The dynamic behavior of flat-nosed Ti-6Al-4V (TC4) alloy projectiles penetrating Q235 steel targets under three velocities (800 m/s, 983 m/s, and 1167 m/s) was studied experimentally and numerically, emphasizing the evolution of adiabatic shear bands of the projectile. The experimental results showe...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525004502 |
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| Summary: | The dynamic behavior of flat-nosed Ti-6Al-4V (TC4) alloy projectiles penetrating Q235 steel targets under three velocities (800 m/s, 983 m/s, and 1167 m/s) was studied experimentally and numerically, emphasizing the evolution of adiabatic shear bands of the projectile. The experimental results showed that the projectile at 800 m/s failed to penetrate the target. For this projectile nose, severe plastic deformation occurred; the shape was changed to mushroom-like; abundant adiabatic shear bands accompanied by defects of micro voids and cracks were found. The projectile at 983 m/s tended to sharpen the nose by material spalling, which was caused by the development of defects. It led to a reduced number of shear bands after penetration. This self-sharpening trend was more obvious for the projectile at 1167 m/s, and shear bands nearly disappeared after penetration. The two projectiles with sharp noses penetrated the targets, generating a perforated tunnel with ductile reaming. Good consistency was achieved between the experimental and numerical results. Further simulation results revealed a critical threshold of 840–860 m/s for the nose transition and showed a similar transformation of nose shape after increasing the target thickness. |
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| ISSN: | 0264-1275 |