Study on the fracture behavior of tungsten alloy projectile cores under impact loading

Abstract To investigate the influence of spaced targets with large angle of obliquity on the penetration performance of tungsten alloy long rod projectiles with large length-diameter ratio, this study conducted experiments and numerical simulations on the penetration of 93W long rod projectiles into oblique spaced targets. By experiments, the fracture morphology of the long rod projectile after penetrating the target was successfully captured. The recovered cores and were systematically analyzed by scanning electron microscopy (SEM). The results indicate that the fracture mode of the long rod projectile was mainly manifested as transgranular fracture of tungsten grains. In addition, the J-C constitutive parameters of 93W were determined. The mechanism of action for long rod projectiles penetrating spaced targets with large angle of obliquity was ballistic deflection and the fracture of long rod projectiles. By altering structure of the long rod projectiles, the penetration effectiveness against oblique spaced targets could be significantly enhanced.