Abstract
A tungsten fiber/Zr-based bulk metallic glass matrix composite (Wf/Zr-MG) is a potential penetrator material. To compare and analyze the penetration behavior of Wf/Zr-MG and a tungsten heavy alloy (WHA), a penetration experiment into the 30CrMnMo homogeneous armor target plate (RHA) is conducted in the present paper, by using a 37 mm smooth bore artillery with an impact velocity of 1550 ± 40 m/s. Unlike the penetrator made of WHA, the self-sharpening phenomenon was observed in the nose of the Wf/Zr-MG rod. The experimental results indicate that the penetration ability of Wf/Zr-MG rod is approximately 10% higher than that of the WHA rod when the impact velocity is 1550 ± 40 m/s. The combined findings on the microscopic morphology, composition, hardness distribution around the crater, and the macroscopic structure of the penetrator residual show that under this impact velocity, the Wf/Zr-MG material shows amorphous gasification. The Wfs outside the rod shows bending and backflow, resulting in the maintenance of the self-sharpening nose of the penetrator during the penetration process. Moreover, the hardness peak around the crater formed by the Wf/Zr-MG rod is lower, and the penetration crater is straighter, indicating that the Wf/Zr-MG rod has a stronger slag removal ability, lower penetration resistance, and higher penetration efficiency. It is an ideal penetrator material.
Highlights
With the development of armor protection technology, more and more RHA materials with high hardness, high strength, penetration resistance, and avalanche resistance are widely used in the protection of typical targets, such as buildings, tanks, and ships
Wf/Zr based bulk metallic glass (Zr-MG) and a tungsten heavy alloy (WHA) rod, but the analysis process was only reflected in the residual rod
A part of Zr-MG gasification was due to a high temperature and strain rate during mately 84° and 86°, respectively, showing a clear “cone” shape, a the high-speed penetration process, which caused the Wfs at the head and surface of the smaller than the nose angle of theconditions, penetrator of the the WH
Summary
With the development of armor protection technology, more and more RHA materials with high hardness, high strength, penetration resistance, and avalanche resistance are widely used in the protection of typical targets, such as buildings, tanks, and ships. The high-density WHA and depleted uranium alloy (DU) are the penetrator materials. The density of Zr-MG is only approximately 6.5 g/cm3 This kind of alloy has almost no macroscopic plasticity, which limits its application in the field of armor piercing engineering. The above research analyzed the penetration mechanism and failure mode of Wf/Zr-MG and WHA rod, but the analysis process was only reflected in the residual rod. The target is another factor that reveals the penetration gain mechanism of Wf/Zr-MG, for which the results have only been listed in relatively few articles, such as the literature [13,14,15]. Wf/Zr-MG rod was revealed by the analysis results
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