Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1575297 | Materials Science and Engineering: A | 2014 | 6 Pages |
Abstract
A theoretical model has been developed to illustrate the effect of shear-coupled migration of grain boundaries on dislocation emission in nanocrystalline materials. The energy characteristics and critical shear stress τcτc that is required to initiate the emission process were determined. The results obtained show that the dislocation emission can be considerably enhanced as shear-coupled migration was the dominating process; a critical coupling factor that corresponded to the minimum τcτc, which led to an optimal dislocation emission, was also discovered. The proposed model has also been quantitatively validated by the existing molecular dynamics simulations.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jianjun Li, A.K. Soh, Xiaolei Wu,