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Effect of imperfections on mechanical properties of copper

Tugrul Ertugrul
Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, University of Tennessee

This page shows visualizations of dislocation nucleation in a distorted single crystal Copper.

In this study, a parallel molecular dynamics code is employed to investigate impact of crystal defects on the tensile strength and dislocation nucleation for a single crystal copper. Point defects are generated by randomly deleting and generating atoms in the lattice structure. Uniaxial tensile load is applied in the <100> direction at a strain rate 1010 s-1 and a temperature of 300 K. The simulation cell size is 10 lattice units in each direction. The embedded-atom method is utilized to approximate an interatomic potential for copper. It is found that the crystal defects in the lattice structure decreases the tensile strength of the copper metal. It is also observed that the dislocation nucleation for the distorted lattice structure is very different than the dislocation nucleation for regular lattice structure. 1

Interactive Structures

Color Legend:

  • brown = copper


1. Spearot, D. E., Tschopp, M. A., Jacob, K. I., and McDowell, D. L., Tensile Strength of 1 0 0 and 1 1 0 Tilt Bicrystal Copper Interfaces, Acta Materialia 55, no. 2 (2007):

posted: March 2020.
updated: March 2020.