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dc.contributor.author
Ruestes, Carlos Javier  
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Anders, Christian  
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Bringa, Eduardo Marcial  
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Urbassek, Herbert M.  
dc.date.available
2020-03-20T16:16:55Z  
dc.date.issued
2018-06  
dc.identifier.citation
Ruestes, Carlos Javier; Anders, Christian; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation; American Institute of Physics; Journal of Applied Physics; 123; 22; 6-2018; 1-10  
dc.identifier.issn
0021-8979  
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http://hdl.handle.net/11336/100407  
dc.description.abstract
Irradiation by light ions may change the mechanical properties of nanofoams. Using molecular-dynamics simulation, we study the effect of irradiating a Au foam (porosity, 50%, and ligament diameter, 3 nm) with heavy ions: here, 10 keV Au ions up to a dose of 4 × 1016 m-2. We demonstrate that in consequence, the ligament morphology changes in the irradiated region, caused by local melting. The changes in mechanical properties are monitored by simulated nanoindentation tests. We find that the foam hardness is only around 1/3 of the hardness of a bulk Au crystal. Irradiation increases the hardness of the foam by around 10% in the central irradiated area. The plastic zone extends to only 1.5 ac, where ac denotes the contact radius; this value is unchanged under irradiation. The hardness increase after irradiation is attributed to two concurring effects. To begin with, irradiation induces melting and annealing of the ligaments, leading to their coarsening and alleviating surface stress, which in turn increases the dislocation nucleation threshold. In addition, irradiation introduces a stacking fault forest that acts as an obstacle to dislocation motion.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
American Institute of Physics  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
nanoindentation  
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foam  
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radiation  
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mechanical properties  
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Ingeniería de los Materiales  
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Ingeniería de los Materiales  
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INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-03-18T20:32:57Z  
dc.journal.volume
123  
dc.journal.number
22  
dc.journal.pagination
1-10  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Ruestes, Carlos Javier. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina  
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Fil: Anders, Christian. University Kaiserslautern; Alemania  
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Fil: Bringa, Eduardo Marcial. Universidad de Mendoza; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina  
dc.description.fil
Fil: Urbassek, Herbert M.. University Kaiserslautern; Alemania  
dc.journal.title
Journal of Applied Physics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/abs/10.1063/1.5027191  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1063/1.5027191