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Atomic processes of shear-coupled migration in {112} twins and vicinal grain boundaries in bcc-Fe
dc.contributor.author | Kvashin, Nikolai |
dc.contributor.author | García-Müller, Pablo Luis |
dc.contributor.author | Anento Moreno, Napoleón |
dc.contributor.author | Serra Tort, Ana María |
dc.contributor.other | Universitat Politècnica de Catalunya. Doctorat en Física Computacional i Aplicada |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental |
dc.date.accessioned | 2020-07-22T11:51:37Z |
dc.date.available | 2020-07-22T11:51:37Z |
dc.date.issued | 2020-07 |
dc.identifier.citation | Kvashin, N. [et al.]. Atomic processes of shear-coupled migration in {112} twins and vicinal grain boundaries in bcc-Fe. "Physical review materials", Juliol 2020, vol. 4, núm. 7, p. 073604:1-073604:8. |
dc.identifier.issn | 2475-9953 |
dc.identifier.uri | http://hdl.handle.net/2117/327359 |
dc.description | © 2020 American Physical Society |
dc.description.abstract | Tilt {112} grain boundaries (GBs) in bcc metals perform shear-coupled grain-boundary migration by the creation and glide of disconnections. Disconnection dipoles may be created at the pristine GB at high stresses or may be generated at the core of a GB dislocation that acts as a source of disconnections. We characterize this source in terms of its Burgers vector, denoted →b1/−1, and describe the mechanism that allows the source to move conservatively with the GB. The →b1/−1 grain-boundary dislocation is created, for instance, during the absorption of a crystal dislocation by the {112} grain boundary. In addition, →b1/−1 accommodates {112} vicinal grain boundaries that are formed by segments of {112} planes separated by →b1/−1 grain-boundary dislocations. The presence of these →b1/−1 dislocations facilitates the conservative displacement of both the pristine and the vicinal GBs. We show that the creation of disconnections is the key for the absorption of edge and screw dislocations by the GB and the drag of mixed dislocations by the GB during its migration. These conservative processes are efficient ways to accommodate plastic deformation by the growth and shrink of {112} twins, and shear-coupled motion of the {112} GB and its vicinal GBs. |
dc.description.sponsorship | This work was supported by the Euratom research and training programme 2014–2018 under Grant Agreement No. 755039 (Project M4F), by the Spanish MINECO: Grants No. FIS2015-69017-P and No. RTI2018-096006-B-I00, the latter with ERDF funds. This work also contributes to the Joint Program on Nuclear Materials (JPNM) of the European Energy Research Alliance (EERA). Simulations partially carried out in the computing facilities provided by the CYTED Network RICAP (517RT0529). |
dc.language.iso | eng |
dc.publisher | American Physical Society (APS) |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials::Metal·lúrgia |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials::Materials compostos |
dc.subject.lcsh | Metals--Plastic properties--Mathematical models |
dc.subject.lcsh | Polycrystals--Plastic properties |
dc.subject.other | Dislocacions |
dc.subject.other | Fronteres de gra |
dc.subject.other | Disconexions |
dc.subject.other | Dislocacions de frontera |
dc.subject.other | Deformació plàstica |
dc.subject.other | Dinàmica molecular |
dc.title | Atomic processes of shear-coupled migration in {112} twins and vicinal grain boundaries in bcc-Fe |
dc.type | Article |
dc.subject.lemac | Policristal·lins |
dc.subject.lemac | Metalls -- Propietats plàstiques |
dc.identifier.doi | 10.1103/PhysRevMaterials.4.073604 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.4.073604 |
dc.rights.access | Open Access |
local.identifier.drac | 28913452 |
dc.description.version | Postprint (author's final draft) |
dc.relation.projectid | info:eu-repo/grantAgreement/MINECO//FIS2015-69017-P/ES/PROCESOS NANO-ESTRUCTURALES EN METALES Y ALEACIONES ASOCIADOS A LA DEFORMACION PLASTICA Y%2FO IRRADIACION/ |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/H2020/755039/EU/MULTISCALE MODELLING FOR FUSION AND FISSION MATERIALS/M4F |
local.citation.author | Kvashin, N.; García-Müller, P.L.; Anento, N.; Serra, A. |
local.citation.publicationName | Physical review materials |
local.citation.volume | 4 |
local.citation.number | 7 |
local.citation.startingPage | 073604:1 |
local.citation.endingPage | 073604:8 |
local.personalitzacitacio | true |
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