Plastic flow in polycrystal states in a binary mixture

Details Plastic flow in polycrystal states in a binary mixture Plastic flow in polycrystal states in a binary mixture

2007-09-05

arxiv.org/abs/0709.0568v1

Physics

Condensed Matter

Soft Condensed Matter

3 pages, 3 figures

Scientific paper

10.1103/PhysRevE.77.042501

Using molecular dynamics simulation we examine dynamics in sheared polycrystal states in a binary mixture containing 10% larger particles in two dimensions. We find large stress fluctuations arising from sliding motions of the particles at the grain boundaries, which occur cooperatively to release the elastic energy stored. These dynamic processes are visualized with the aid of a sixfold angle $\alpha_j(t)$ representing the local crystal orientation and a disorder variable $D_j(t)$ representing a deviation from the hexagonal order for particle $j$.

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