Ballistic impact experiments are conducted on a cast Mg-6Gd-3Y-0.5Zr alloy using spherical projectiles under a wide range of impact velocities. Penetration processes are captured by high-speed camera. Postmortem target samples are characterized via three-dimensional laser scanning, metallographic microscopy, scanning electron microscopy and electron backscatter diffraction. Shear bands and twinning dominate the deformation of Mg-6Gd-3Y-0.5Zr near the crater, and texture changes due to compression caused by cavity expansion. For instance, a finite element model based on Johnson–Cook constitutive model and Mie–Grüneisen equation of state is established. Four dimensionless quantities related to craters and projectiles are defined. An analytical model based on dynamic cylindrical cavity expansion model is applied considering projectile deformation, and consistent well with experimental and simulated results over the entire incident velocity range.

在各种冲击速度下使用球形射弹对铸造 Mg-6Gd-3Y-0.5Zr 合金进行弹道冲击实验。渗透过程由高速相机捕捉。死后目标样品通过三维激光扫描、金相显微镜、扫描电子显微镜和电子背散射衍射进行表征。剪切带和孪晶主导弹坑附近 Mg-6Gd-3Y-0.5Zr 的变形，以及由于空腔膨胀引起的压缩而导致的织构变化。例如，建立了基于Johnson-Cook本构模型和Mie-Grüneisen状态方程的有限元模型。定义了与陨石坑和射弹相关的四个无量纲量。考虑弹丸变形，应用基于动态圆柱腔膨胀模型的分析模型，