Deformation and Fracture of Metallic Nanowires

Abstract

A many-body interatomic potential for metallic nanowires within the second-moment approximation of the tight-binding model (the Cleri-Rosato potential) was employed to carry out three dimensional molecular dynamics simulations. Molecular dynamics simulation results for metallic nanowires at various temperature are presented. The stress–time and stress length curves for nanowires are simulated. The breaking and yield stress of nanowires are dependent on the Volume and temperature. The necking, Plastic deformation, slipping domain, twins, clusters, microspores and break-up phenomena of nanowire are demonstrated. Stress decreases with increasing nanowire volume and temperature. The final breaking position occurs at the central part of the nanowire when it is short, as the nanowire length increases the breaking position gradually shifts to the ends.

Molecular Dynamics (MD) Simulation of FCC Metallic Ni3Al Alloy at High Temperature

“…The following sections discuss MD simulation methodology, properties of FCC nanowires, and comparison of their properties with body-centered cubic (BCC) and hexagonal closed-packed (HCP) nanowires. The mechanical properties of Ni nanowires dependence on size, shape, as well as the temperature have been studied [1][2][3][4][5][6][7]. Characterization of strain-induced structural transformations in CdSe nanowires using molecular dynamics simulation also studied [8].…”