Visualization of stacking faults in fcc crystals in plastic deformations

Details Visualization of stacking faults in fcc crystals in plastic deformations Visualization of stacking faults in fcc crystals in plastic deformations

2011-03-05

arxiv.org/abs/1103.1051v2

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 8 figures

Scientific paper

Using molecular dynamics simulation, we investigate the dynamics of stacking faults in fcc crystals in uniaxial stretching in a Lennard-Jones binary mixture composed of 4096 particles in three dimensions. We visualize stacking faults using a disorder variable $D_j(t)$ for each particle $j$ constructed from local bond order parameters based on spherical harmonics (Steinhardt order parameters). Also introducing a method of bond breakage, we examine how stacking faults are formed and removed by collective particle motions. These processes are relevant in plasticity of fcc crystals.

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