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dc.contributor.author
Tang, Yizhe  
dc.contributor.author
Bringa, Eduardo Marcial  
dc.contributor.author
Meyers, Marc A.  
dc.date.available
2017-06-30T18:34:10Z  
dc.date.issued
2012-06  
dc.identifier.citation
Tang, Yizhe; Bringa, Eduardo Marcial; Meyers, Marc A.; Ductile tensile failure in metals through initiation and growth of nanosized voids; Elsevier; Acta Materialia; 60; 12; 6-2012; 4856-4865  
dc.identifier.issn
1359-6454  
dc.identifier.uri
http://hdl.handle.net/11336/19298  
dc.description.abstract
We here reveal the initiation of ductile failure in metals at the nanometer scale by molecular dynamics simulations coupled with a novel analytical model. This proceeds by the emission of a special type of dislocation shear loop, which can expand as a partial or perfect dislocation, evolve into a prismatic loop through reaction, or develop into twins. Molecular dynamics (MD) simulations predict a strong dependence of the stress required for the initiation of plastic flow at the surface of the void for both Cu (a model fcc metal) and Ta (a model bcc metal). The decrease in stress with increasing void size is also analyzed in terms of a new analytical approach based on the energetics of dislocation loop emission. For both fcc (copper) and bcc (tantalum) metals initiation of plastic flow in MD simulations takes place at voids as small as a tri-vacancy (radius R 0.1 nm). Extensive calculations for tantalum combined with the analytical model, which tracks the simulations, enable extrapolation to R 300 nm, in the realm of second phase particles and inclusions. Thus we conclude that this is a general mechanism of tensile failure in pure monocrystalline metals where other initiation sites are absent.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Void Growth  
dc.subject
Dislocation  
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Ductile Failure  
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Molecular Dynamics  
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Física de los Materiales Condensados  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Ductile tensile failure in metals through initiation and growth of nanosized voids  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-04-07T13:40:17Z  
dc.journal.volume
60  
dc.journal.number
12  
dc.journal.pagination
4856-4865  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Tang, Yizhe. University Of California At San Diego; Estados Unidos  
dc.description.fil
Fil: Bringa, Eduardo Marcial. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina  
dc.description.fil
Fil: Meyers, Marc A.. University Of California At San Diego; Estados Unidos  
dc.journal.title
Acta Materialia  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.actamat.2012.05.030  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1359645412003503