Features of deformation and breaking for Ni nanowire

M.D. Starostenkov1, M.M. Aish2
1Altai State Technical University Lenin st., 46, Barnaul, 656038, Russia
2Minoufiya University, P.O. Box 32511, Gamal Abdel Nasser St, Shebin Al-Kom, Menoufia
Abstract
 Molecular Dynamics (MD) simulations have been carried out on pure Nickel (Ni) crystal with face-centered cubic (FCC) lattice upon application of uniaxial tension at nanolevel with a speed of 20 m/s. The deformation corresponds to the direction <001>. To the calculated block of crystal - free boundary condi-tions are applied in the directions <100>, <010>. A many-body interatomic potential for Ni within the sec-ond-moment approximation of the tight-binding model (the Cleri and Rosato potentials) was employed to carry out three dimensional molecular dynamics simulations. A computer experiment is performed at a tem-perature corresponding to 10K, 300Kand 1000K. MD simulation used to investigate the effect of long of Ni nanowire on the nature of deformation and fracture. The feature of deformation energy can be divided into four regions: quasi-elastic, plastic, flow and failure. The nature of deformation, slipping, twinning and neck-ing were studied. Stress decreased with increasing volume. The results showed that breaking position de-pended on the nanowire length.
Received: 31 March 2014   Accepted: 16 June 2014
Views: 86   Downloads: 20
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