Journal
MATERIALS
Volume 16, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/ma16010040
Keywords
penetration fracture mode; tungsten-fiber-reinforced Zr-based bulk metallic glass matrix composite (WF/Zr-MG); impact velocity; bending and backflow
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The fracture mechanism of high-velocity penetration of penetrators is studied in order to adapt to the launch velocity of modern artillery. A study on the penetration fracture mode of tungsten-fiber-reinforced Zr-based bulk metallic glass matrix composite (WF/Zr-MG) rods at high velocity is conducted. The experimental results show that the higher penetration ability of WF/Zr-MG rods is due to their self-sharpening feature and a longer quasi-steady penetration phase compared to tungsten alloy (WHA) rods. The deformation mode of the Zr-based bulk metallic glass matrix (Zr-MG) is an important factor affecting the penetration fracture mode of the WF/Zr-MG rod.
In order to adapt to the launch velocity of modern artillery, it is necessary to study the fracture mechanism of the high-velocity penetration of penetrators. Therefore, the penetration fracture mode of tungsten-fiber-reinforced Zr-based bulk metallic glass matrix composite (WF/Zr-MG) rods at a high velocity is studied. An experiment on WF/Zr-MG rods penetrating into rolled homogeneous armor steel (RHA) was carried out at 1470 similar to 1650 m/s. The experimental results show that the higher penetration ability of WF/Zr-MG rods not only results from their self-sharpening feature, but also due to the fact they have a longer quasi-steady penetration phase than tungsten alloy (WHA) rods. Above 1500 m/s, the penetration fracture mode of the WF/Zr-MG rod is the bending and backflow of tungsten fibers. Our theoretical calculation shows that the deformation mode of the Zr-based bulk metallic glass matrix (Zr-MG) is an important factor affecting the penetration fracture mode of the WF/Zr-MG rod. When the impact velocity increases from 1000 m/s to 1500 m/s, the deformation mode of Zr-MG changes from shear localization to non-Newtonian flow, leading to a change in the penetration fracture mode of the WF/Zr-MG rod from shear fracture to the bending and backflow of tungsten fibers.
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