On shear-coupled migration of grain boundaries in nanocrystalline materials
Applied Physics Letters, ISSN: 0003-6951, Vol: 101, Issue: 24
2012
- 26Citations
- 25Captures
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Article Description
Shear-coupled migration of grain boundary (GB) was theoretically modeled as a generic mode of plastic deformation in nanocrystalline materials. The energy change due to this process that carried both rotational and translational plastic flow through the normal migration and the shear coupled to the said migration, respectively, was calculated. The results obtained revealed that the shear-coupled migration was energetically more favorable than the pure migration of a grain boundary. The translational deformation can turn the initially energetically unfavorable process into a favorable one, and it can decrease the critical stress required to initiate the process of migration by around 30%-80% as compared with that for pure GB migration. © 2012 American Institute of Physics.
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