Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation

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 conse...

Descripción completa

Detalles Bibliográficos
Autores: Ruestes, Carlos Javier, Anders, Christian, Bringa, Eduardo Marcial, Urbassek, Herbert M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/100407
Acceso en línea:http://hdl.handle.net/11336/100407
Access Level:acceso abierto
Palabra clave:nanoindentation
foam
radiation
mechanical properties
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
id AR_40e3d88a5ad7551ec00a7737734bb0a9
oai_identifier_str oai:ri.conicet.gov.ar:11336/100407
network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulationRuestes, Carlos JavierAnders, ChristianBringa, Eduardo MarcialUrbassek, Herbert M.nanoindentationfoamradiationmechanical propertieshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Irradiation 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.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; ArgentinaFil: Anders, Christian. University Kaiserslautern; AlemaniaFil: Bringa, Eduardo Marcial. Universidad de Mendoza; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; ArgentinaFil: Urbassek, Herbert M.. University Kaiserslautern; AlemaniaAmerican Institute of Physics2018-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/100407Ruestes, 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; 1-100021-8979CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/abs/10.1063/1.5027191info:eu-repo/semantics/altIdentifier/doi/10.1063/1.5027191info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:39:34Zoai:ri.conicet.gov.ar:11336/100407instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:39:34.516CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
title Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
spellingShingle Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
Ruestes, Carlos Javier
nanoindentation
foam
radiation
mechanical properties
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
title_short Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
title_full Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
title_fullStr Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
title_full_unstemmed Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
title_sort Nanoindentation tests of heavy-ion-irradiated Au foams - Molecular dynamics simulation
dc.creator.none.fl_str_mv Ruestes, Carlos Javier
Anders, Christian
Bringa, Eduardo Marcial
Urbassek, Herbert M.
author Ruestes, Carlos Javier
author_facet Ruestes, Carlos Javier
Anders, Christian
Bringa, Eduardo Marcial
Urbassek, Herbert M.
author_role author
author2 Anders, Christian
Bringa, Eduardo Marcial
Urbassek, Herbert M.
author2_role author
author
author
dc.subject.none.fl_str_mv nanoindentation
foam
radiation
mechanical properties
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
topic nanoindentation
foam
radiation
mechanical properties
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
description 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.
publishDate 2018
dc.date.none.fl_str_mv 2018-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/100407
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
0021-8979
CONICET Digital
CONICET
url http://hdl.handle.net/11336/100407
identifier_str_mv 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
0021-8979
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/abs/10.1063/1.5027191
info:eu-repo/semantics/altIdentifier/doi/10.1063/1.5027191
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1799194940114206720
score 15.81155

Similares en LA Referencia