Damage Features of Zr_(41)Ti_(14)Cu_(12.5)Ni_(10)Be_(22.5) Bulk Metallic Glass Impacted by Hypervelocity Projectiles

摘要

The damage features of Zr_(41)Ti_(14)Cu_(12.5)Ni_(10)Be_(22.5) bulk metallic glass under hypervelocity impact were investigated by firing aluminum projectiles with a two-stage light gas gun. Scanning electron microscope results show that radial and symmetric cracks form on the shocked surface of the bulk metallic glass target at the impacted location by a planar aluminum flyer with the velocity of 2.7 km/s. Shear bands/cracks parallel to each other on the cross section close to the shocked surface of the target are observed. The damage features under the spherical aluminum projectiles' impact were also examined. It is shown that besides formation of the similar adiabatic shear bands/cracks, the craters and the lamination cracks are formed, and the depth of the craters increases with increasing projectile velocity.