Wave formation process upon explosive welding: electron microscopic   observations and imitating experiments
  A sequence of the interface transition states was investigated. A transition state has been found, during which cusps look like splashes. Images of the splashes for different joints have been obtained. The processes of self-organization of the splashes into a quasi-wave surface and a perfect wavy surface have been revealed. Simulations experiments have been conducted. Heterogeneity and the interface bending of one of the contacting materials have been detected. They imitate the heterogeneity on the interface arising upon explosive welding. 
B. A. Greenberg, M. A. Ivanov, A.V. Inozemtsev, M. S. Pushkin, A. M.   Patselov, O. A. Elkina, S. V. Kuzmin, V. I. Lysak
physics.ins-det cond-mat.mtrl-sci