Simulation of punching of thin film single crystals by molecular dynamics

Punching of thin films was simulated by the use of the molecular dynamic an d n-body embedded function. Punched films are copper small crystals of 5-6 atomic layer thickness, with the (110) plane parallel to the surface. Two t ypes of punching shape are examined: rhombus and circle. The slip direction is perpendicular to the (110) surface. A prismatic partial dislocation was created near the surface of (110) and the second prismatic partial disloca tion was then created. The first partial and second partial punching disloc ations were connected by a cylindrical stacking fault. Split of prismatic d islocations in the face centered lattice is first suggested and demonstrate d. (C) 1998 Elsevier Science S.A. All rights reserved.