Stabilization of Wave Formation on a Contact Boundary of Metal Layers at an Oblique Impact during Kelvin - Helmholtz Instability Development

Plane metal layers loading by an oblique shock wave during explosive welding and various shields' effects on a contact boundary state after the loading were experimentally investigated. The stabilizing effect of thin metal coating on the explosive welding and disturbance evolution at a contact boundary was experimentally found. For example for copper -- copper contact boundary disturbance amplitude is $a \quad \approx $ 350 $\mu $m. For contact boundary for the same pair, but under the loading through a zinc layer $\Delta \quad \approx $ 22 $\mu $m thick, the disturbance amplitude decreased up to $a \quad \approx $ 15 $\mu $m. Thermophysical properties of a coating material affect the stabilization. The phenomenon of perturbation attenuation can be explained by the character of occurred hydrodynamic flow and complicated stress -- strain state of substance.