Nano Archive

Emission of partial dislocations from triple junctions of grain boundaries in nanocrystalline materials

Gutkin, M Yu and Ovid'ko, I A and Skiba, N V (2005) Emission of partial dislocations from triple junctions of grain boundaries in nanocrystalline materials. Journal of Physics D: Applied Physics, 38 (21). pp. 3921-3925.

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Official URL: http://stacks.iop.org/0022-3727/38/3921

Abstract

A theoretical model is suggested that describes emission of partial Shockley dislocations from triple junctions of grain boundaries (GBs) in deformed nanocrystalline materials. In the framework of the model, triple junctions accumulate dislocations due to GB sliding along adjacent GBs. The dislocation accumulation at triple junctions causes partial Shockley dislocations to be emitted from the dislocated triple junctions and thus accommodates GB sliding. Ranges of parameters (applied stress, grain size, etc) are calculated in which the emission events are energetically favourable in nanocrystalline Al, Cu and Ni. The model accounts for the corresponding experimental data reported in the literature.

Item Type:Article
ID Code:5435
Deposited By:Prof. Alexey Ivanov
Deposited On:06 Feb 2010 11:11
Last Modified:06 Feb 2010 11:53

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