Abstract
Shear stress driven grain boundary (GB) migration was found to be a ubiquitous phenomenon in small grained polycrystalline materials. Here we show that the GB displacement shift complete (DSC) dislocation mechanism for GB shear coupled migration is still functioning even if the geometry orientation of the GBs deviates a few degrees from the appropriate coincidence site lattice (CSL) GBs. It means that any large angle GB can have a considerable chance to be such a "CSL-related GB" for which the shear coupled GB migration motion can happen by the GB DSC dislocation mechanism. We conclude that the CSL-DSC bi-crystallographic lattice structure in GB is the main reason that GB can migrate under shear stress.
| Original language | English |
|---|---|
| Article number | 13441 |
| Journal | Scientific Reports |
| Volume | 5 |
| DOIs | |
| Publication status | Published - 25 Aug 2015 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Funding
We acknowledge the financial support from the National Science Foundation of China (grant number 51201127). W.Z.H was supported by the Youth Thousand Talents Plan and the Young Talent Support Plan of XJTU. L.W. would like to thank Ju Li, Zhiwei Shan and Boyu Liu for insightful discussions.
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
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