Bi-crystallographic lattice structure directs grain boundary motion under shear stress

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Wan, Liang, Han, Weizhong, Chen, Kai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4548247/
https://www.ncbi.nlm.nih.gov/pubmed/26304553
http://dx.doi.org/10.1038/srep13441
_version_ 1782387177532948480
author Wan, Liang
Han, Weizhong
Chen, Kai
author_facet Wan, Liang
Han, Weizhong
Chen, Kai
author_sort Wan, Liang
collection PubMed
description 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.
format Online
Article
Text
id pubmed-4548247
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-45482472015-08-26 Bi-crystallographic lattice structure directs grain boundary motion under shear stress Wan, Liang Han, Weizhong Chen, Kai Sci Rep Article 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. Nature Publishing Group 2015-08-25 /pmc/articles/PMC4548247/ /pubmed/26304553 http://dx.doi.org/10.1038/srep13441 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ 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/
spellingShingle Article
Wan, Liang
Han, Weizhong
Chen, Kai
Bi-crystallographic lattice structure directs grain boundary motion under shear stress
title Bi-crystallographic lattice structure directs grain boundary motion under shear stress
title_full Bi-crystallographic lattice structure directs grain boundary motion under shear stress
title_fullStr Bi-crystallographic lattice structure directs grain boundary motion under shear stress
title_full_unstemmed Bi-crystallographic lattice structure directs grain boundary motion under shear stress
title_short Bi-crystallographic lattice structure directs grain boundary motion under shear stress
title_sort bi-crystallographic lattice structure directs grain boundary motion under shear stress
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4548247/
https://www.ncbi.nlm.nih.gov/pubmed/26304553
http://dx.doi.org/10.1038/srep13441
work_keys_str_mv AT wanliang bicrystallographiclatticestructuredirectsgrainboundarymotionundershearstress
AT hanweizhong bicrystallographiclatticestructuredirectsgrainboundarymotionundershearstress
AT chenkai bicrystallographiclatticestructuredirectsgrainboundarymotionundershearstress

Ejemplares similares