Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

8-4-2011

Abstract

The interplay between diffusional and displacive atomic movements is a key to understanding deformation mechanisms and microstructure evolution in solids. The ability to handle the diffusional time scale and the structural complexity in these problems poses a general challenge to atomistic modeling. We present here an approach called diffusive molecular dynamics (DMD), which can capture the diffusional time scale while maintaining atomic resolution, by coarse-graining over atomic vibrations and evolving a smooth site-probability representation. The model is applied to nanoindentation and sintering, where intimate coupling between diffusional creep, displacive dislocation nucleation, and grain rotation are observed.

Comments

Suggested Citation:
Li, J. et al. (2011). Diffusive molecular dynamics and its application to nanoindentation and sintering. Physical Review B. 84, 0514103.

© 2011 American Physical Society
http://dx.doi.org/10.1103/PhysRevB.84.054103

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Date Posted: 26 March 2012

This document has been peer reviewed.