Damage characteristic of target penetrated by WF/Zr-MG and 93W rods

WU Shuogang; DU Chengxin; ZHOU Feng; GAO Guangfa; LYU Wenzheng; CHEN Xi

doi:10.11883/bzycj-2023-0312

Volume 44 Issue 4

Apr. 2024

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WU Shuogang, DU Chengxin, ZHOU Feng, GAO Guangfa, LYU Wenzheng, CHEN Xi. Damage characteristic of target penetrated by WF/Zr-MG and 93W rods[J]. Explosion And Shock Waves, 2024, 44(4): 043302. doi: 10.11883/bzycj-2023-0312

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Damage characteristic of target penetrated by WF/Zr-MG and 93W rods

doi: 10.11883/bzycj-2023-0312

Department of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2023-08-28
Rev Recd Date: 2024-01-22

Available Online: 2024-01-23

Publish Date: 2024-04-07

Abstract

Abstract

In order to compare and analyze the characteristic and mechanism of damaging on 45 steel target plate penetrated by the WF/Zr-MG and 93W rod, a penetration experiment under hypervelocity impact was carried out. The analysis of penetration was performed at both macro and micro levels, in which the macroscopic quantitative characterization quantity was studied by equivalent diameter of reamer, and the microscopic morphology, phase transition and hardness characteristics of the target plate were obtained by scanning electron microscopy, optical microscope, X-ray diffraction and microhardness tester.The experimental results indicate that the WF/Zr-MG rod completely penetrated the target plate, while the 93W rod remained in the target plate. The armor-piercing capacity of WF/Zr-MG rod is higher than that of 93W rod with equivalent reaming diameter of 16.7 mm and 18.4 mm respectively, and the former is 10.18% lower than the latter. From the microscopic perspective, the aspect ratios of the fine grain layer after penetrated by the WF/Zr-MG rod and the 93W rod are 4.5 and 7.3, respectively. In addition, the width of the high-hardness layer are 10.2 mm and 8.9 mm, with Vickers hardness HV peaks at 249 and 287, respectively. The wider high-hardness layer observed in the former case can be attributed to the continuous burning of the Zr-based amorphous alloy during the penetration process, resulting in a larger temperature affected zone and consequently a greater area of hardness enhancement. On the other hand, in the latter case, the strength of the target plate during penetration is significantly higher due to the buckling and backflow of the WF/Zr-MG rod, while the 93W alloy core exhibits a "mushroom head" phenomenon. This reduces extrusion deformation on the target plate, thereby weakening the effect of grain elongation, reducing the increase in hardness peak value, and minimizing energy loss per unit length of the target plate. Ultimately, it enhances the armor-piercing capability of the WF/Zr-MG rod.
- WF/Zr-MG,
- 93W,
- micro analysis,
- hardness analysis,
- damage characteristic

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