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dc.contributor.author
Farkas, Diana
dc.contributor.author
Caro, Alfredo
dc.contributor.author
Bringa, Eduardo Marcial
dc.contributor.author
Crowson, Douglas
dc.date.available
2015-10-01T19:50:30Z
dc.date.issued
2013-05
dc.identifier.citation
Farkas, Diana; Caro, Alfredo; Bringa, Eduardo Marcial; Crowson, Douglas; Mechanical response of nanoporous gold; Pergamon-elsevier Science Ltd; Acta Materialia; 61; 9; 5-2013; 3249-3256
dc.identifier.issn
1359-6454
dc.identifier.uri
http://hdl.handle.net/11336/2279
dc.description.abstract
We report the results of computational tensile and compressive tests for model bi-continuous nanoporous gold structures using atomistic simulations with empirical many-body potentials and molecular dynamics. The results are compared with the predictions of scaling laws for coarser-scale foams and with available experimental data. We find a surprising substantial tension/compression asymmetry in yield due to the surface stress that sets the filament under compression, providing a bias favoring yielding in compression. We provide a model for our results based on a ligament strength value close to the theoretical strength of Au, and the surface stress. The model predicts a significant tension/compression asymmetry for ligament sizes below ∼10 nm and pore collapse for ligament sizes below 1 nm. We also observe an unexpected compaction tendency under tension characterized by a decrease in the total volume of the sample of 15% for samples deformed under tension by 30%. The mechanism of the compaction involves a decrease in the average pore size and pore collapse resulting from plasticity within the ligaments.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-elsevier Science Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Nanoporous
dc.subject
Mechanical Properties
dc.subject
Molecular Dynamics
dc.subject.classification
Otras Ingeniería de los Materiales
dc.subject.classification
Ingeniería de los Materiales
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Mechanical response of nanoporous gold
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
61
dc.journal.number
9
dc.journal.pagination
3249-3256
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Farkas, Diana. Virginia Polytechnic Institute; Estados Unidos;
dc.description.fil
Fil: Caro, Alfredo. Material Science and Technology Division, Los Alamos National Laboratory; 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 Mendoza; Argentina;
dc.description.fil
Fil: Crowson, Douglas. Virginia Polytechnic Institute; Estados Unidos;
dc.journal.title
Acta Materialia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1359645413001353
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.actamat.2013.02.013
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