Shock-Induced Plasticity and Resultant Defect Analysis in a Vacuum Kinetic Sprayed Silver Film

High velocity particle impact generates a shock wave that penetrates the material, resulting in severe plasticity and damage. Finite element method simulation demonstrates that Ag particle momentarily undergoes severe deformation with a high strain rate because of stress fluctuation in the material during the shock wave passage. High-resolution transmission electron microscopy analysis reveals that the lattice was severely distorted, flow-like bent with many geometrically necessary dislocations and stacking faults, twinned at the nanoscale, and collapsed into amorphous state.