Annealing twins in nanocrystalline fcc metals: A molecular dynamics simulation

D Farkas and E Bringa and A Caro, PHYSICAL REVIEW B, 75, 184111 (2007).

DOI: 10.1103/PhysRevB.75.184111

We report fully three-dimensional atomistic molecular dynamics studies of grain growth kinetics in nanocrystalline Cu of 5 nm average grain size. We observe the formation of annealing twins as part of the grain growth process. The grain size and energy evolution was monitored as a function of time for various temperatures, yielding an activation energy for the process. The atomistic mechanism of annealing twin formation from the moving boundaries is described.

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