Characterization of Crater Area in a Target Penetrated by a Wf/Zr-Based Amorphous Matrix Composite Projectile

• Main Authors: Xianghai Ye, Minming Zou, Jiankang Chen
• Format: Article
• Language: English
• Published: MDPI AG 2020-12-01
• Series: Materials
• Subjects: Wf/Zr-based amorphous matrix composite; adiabatic shear band; penetration; 4340 steel
• Online Access: https://www.mdpi.com/1996-1944/13/23/5523

Tungsten fiber-reinforced Zr_41.25Ti_13.75Cu_12.5Ni₁₀Be_22.5 amorphous matrix composites (hereinafter referred to as Wf/Zr-based amorphous matrix composites) are considered as a potential new generation of projectile material, while the penetration behavior of Wf/Zr-based amorphous matrix composites is not fully clear yet. In order to better understand the penetration behavior of this composite material and study its armor-piercing performance, a ballistic experiment was performed and the hardness and microstructure around the crater of a target material were studied. A ballistic experiment was performed with a projectile of Wf/Zr-based amorphous matrix composite and a target of 4043 steel. After the ballistic experiment, the target was cut through the crater using a wire cutting machine into a sample with size 150 mm × 40 mm × 20 mm, which was later polished by different types of sandpaper. The micro-hardness was analyzed in a micro-hardness tester, and the microstructure was observed by SEM. According to this study, three layers were identified in the direction lateral to the crater, consisting of a martensite layer, a deformation strengthening layer, and the original structure layer. Moreover, the martensite layer initially thickened and then thinned in the direction longitudinal to the crater.