Linear grain growth kinetics and rotation in nanocrystalline Ni

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Date
2007-04-20
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract

We report three-dimensional atomistic molecular dynamics studies of grain growth kinetics in nanocrystalline Ni. The results show the grain size increasing linearly with time, contrary to the square root of the time kinetics observed in coarse-grained structures. The average grain boundary energy per unit area decreases simultaneously with the decrease in total grain boundary area associated with grain growth. The average mobility of the boundaries increases as the grain size increases. The results can be explained by a model that considers a size effect in the boundary mobility.

Description
Keywords
Plastic-deformation mechanisms, Molecular-dynamics simulations, FCC, Metals, Diffusion, Nanoscale, Copper, Physics
Citation
Farkas, Diana ; Mohanty, Som ; Monk, Joshua, Apr 20, 2007. “Linear grain growth kinetics and rotation in nanocrystalline Ni,” PHYSICAL REVIEW LETTERS 98(16): 165502. DOI: 10.1103/PhysRevLett.98.165502