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. 2016 Mar 9;6:22937. doi: 10.1038/srep22937

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Copyright © 2016, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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The images are taken along the [111] direction. (a) A GB with angle of 15.9° was observed near the fracture region. The GB was drawn with purple dash line. (b) A GB with angle of 6.2° was observed during necking.