File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Low-angle grain boundary migration in the presence of extrinsic dislocations

TitleLow-angle grain boundary migration in the presence of extrinsic dislocations
Authors
KeywordsDislocation dynamics
Dislocation boundaries
Grain boundary mobility
Grain boundary migration
Issue Date2009
Citation
Acta Materialia, 2009, v. 57, n. 17, p. 5013-5022 How to Cite?
AbstractWe investigated the migration of a symmetric tilt, low-angle grain boundary (LAGB) under applied shear stress in the presence of extrinsic dislocations. The results demonstrate that there is a threshold stress for the LAGB to depin from extrinsic dislocations. Below the threshold stress, the LAGB remains immobile at zero dislocation climb mobility, while for finite climb mobilities, it migrates at a velocity that is directly proportional to the applied stress, with a proportionality factor that is a function of misorientation, dislocation climb mobility and extrinsic dislocation density. We derive analytical expressions for the LAGB mobility and threshold stress for depinning from extrinsic dislocations. The analytical prediction of the LAGB mobility is in excellent agreement with the simulation as well as experimental results. We discuss the implications of these results for understanding the migration of general grain boundaries. © 2009 Acta Materialia Inc.
Persistent Identifierhttp://hdl.handle.net/10722/303349
ISSN
2023 Impact Factor: 8.3
2023 SCImago Journal Rankings: 2.916
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLim, A. T.-
dc.contributor.authorSrolovitz, D. J.-
dc.contributor.authorHaataja, M.-
dc.date.accessioned2021-09-15T08:25:07Z-
dc.date.available2021-09-15T08:25:07Z-
dc.date.issued2009-
dc.identifier.citationActa Materialia, 2009, v. 57, n. 17, p. 5013-5022-
dc.identifier.issn1359-6454-
dc.identifier.urihttp://hdl.handle.net/10722/303349-
dc.description.abstractWe investigated the migration of a symmetric tilt, low-angle grain boundary (LAGB) under applied shear stress in the presence of extrinsic dislocations. The results demonstrate that there is a threshold stress for the LAGB to depin from extrinsic dislocations. Below the threshold stress, the LAGB remains immobile at zero dislocation climb mobility, while for finite climb mobilities, it migrates at a velocity that is directly proportional to the applied stress, with a proportionality factor that is a function of misorientation, dislocation climb mobility and extrinsic dislocation density. We derive analytical expressions for the LAGB mobility and threshold stress for depinning from extrinsic dislocations. The analytical prediction of the LAGB mobility is in excellent agreement with the simulation as well as experimental results. We discuss the implications of these results for understanding the migration of general grain boundaries. © 2009 Acta Materialia Inc.-
dc.languageeng-
dc.relation.ispartofActa Materialia-
dc.subjectDislocation dynamics-
dc.subjectDislocation boundaries-
dc.subjectGrain boundary mobility-
dc.subjectGrain boundary migration-
dc.titleLow-angle grain boundary migration in the presence of extrinsic dislocations-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.actamat.2009.07.003-
dc.identifier.scopuseid_2-s2.0-69949180804-
dc.identifier.volume57-
dc.identifier.issue17-
dc.identifier.spage5013-
dc.identifier.epage5022-
dc.identifier.isiWOS:000270691000008-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats