Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy

Autores
Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Tramontina Videla, Diego Ramiro; Valencia, Felipe; Merkert, Nina; Farkas, Diana; Caro, Alfredo; Urbassek, Herbert M.; Bringa, Eduardo Marcial
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The plastic response of a dual-phase high-entropy alloy to nanoindentation is studied using molecular dynamics simulation. The sample has a bicontinuous lamellar structure consisting of an equiatomic FeNiCrCo fcc phase and an Al50(FeNiCrCo)50 bcc/B2 phase. Its large size (28 million atoms) allows comparison of indentations into an fcc lamella, a bcc lamella and on an fcc/bcc interface. In addition, the lamella thickness of 20–30 nm allows for extensive dislocation plasticity both in the fcc and the bcc phase. We find that the hardness of the alloy at the interphase boundary is not a simple average of the hardness of the lamellae. The plasticity is mostly dislocation controlled, and twinning is relevant only in the fcc phase. Phase transformations do not occur and – in contrast to previous studies – even amorphization is negligible. Dislocation pile-ups are observed in the fcc phase next to the interface. Shear strain is not easily transmitted – in the form of dislocations or stacking faults – across phase boundaries
Fil: Alabd Alhafez, Iyad. Clausthal University Of Technology; Alemania
Fil: Deluigi, Orlando Raul. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza; Argentina
Fil: Tramontina Videla, Diego Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza; Argentina
Fil: Valencia, Felipe. Universidad Católica de Maule; Chile
Fil: Merkert, Nina. Clausthal University of Technology; Alemania
Fil: Farkas, Diana. No especifíca;
Fil: Caro, Alfredo. The George Washington University; Estados Unidos
Fil: Urbassek, Herbert M.. Clausthal University Of Technology; Alemania
Fil: Bringa, Eduardo Marcial. Universidad de Mendoza; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
HIGH ENTROPHY ALLOYS
NANOINDENTATION
DISLOCATIONS
PLASTICITY
PHASE TRANSFORMATION
MOLECULAR DYNAMICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/282466
Acceder
id CONICETDig_3052a28ccab57b9711054a42f95de7ca
oai_identifier_str oai:ri.conicet.gov.ar:11336/282466
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloyAlabd Alhafez, IyadDeluigi, Orlando RaulTramontina Videla, Diego RamiroValencia, FelipeMerkert, NinaFarkas, DianaCaro, AlfredoUrbassek, Herbert M.Bringa, Eduardo MarcialHIGH ENTROPHY ALLOYSNANOINDENTATIONDISLOCATIONSPLASTICITYPHASE TRANSFORMATIONMOLECULAR DYNAMICShttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The plastic response of a dual-phase high-entropy alloy to nanoindentation is studied using molecular dynamics simulation. The sample has a bicontinuous lamellar structure consisting of an equiatomic FeNiCrCo fcc phase and an Al50(FeNiCrCo)50 bcc/B2 phase. Its large size (28 million atoms) allows comparison of indentations into an fcc lamella, a bcc lamella and on an fcc/bcc interface. In addition, the lamella thickness of 20–30 nm allows for extensive dislocation plasticity both in the fcc and the bcc phase. We find that the hardness of the alloy at the interphase boundary is not a simple average of the hardness of the lamellae. The plasticity is mostly dislocation controlled, and twinning is relevant only in the fcc phase. Phase transformations do not occur and – in contrast to previous studies – even amorphization is negligible. Dislocation pile-ups are observed in the fcc phase next to the interface. Shear strain is not easily transmitted – in the form of dislocations or stacking faults – across phase boundariesFil: Alabd Alhafez, Iyad. Clausthal University Of Technology; AlemaniaFil: Deluigi, Orlando Raul. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza; ArgentinaFil: Tramontina Videla, Diego Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza; ArgentinaFil: Valencia, Felipe. Universidad Católica de Maule; ChileFil: Merkert, Nina. Clausthal University of Technology; AlemaniaFil: Farkas, Diana. No especifíca;Fil: Caro, Alfredo. The George Washington University; Estados UnidosFil: Urbassek, Herbert M.. Clausthal University Of Technology; AlemaniaFil: Bringa, Eduardo Marcial. Universidad de Mendoza; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier2025-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/282466Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Tramontina Videla, Diego Ramiro; Valencia, Felipe; Merkert, Nina; et al.; Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy; Elsevier; Journal of Materials Research and Technology; 37; 7-2025; 1406-14172238-7854CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S2238785425014139info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmrt.2025.05.257info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-04-15T10:09:22Zoai:ri.conicet.gov.ar:11336/282466instacron: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:34982026-04-15 10:09:22.808CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
title Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
spellingShingle Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
Alabd Alhafez, Iyad
HIGH ENTROPHY ALLOYS
NANOINDENTATION
DISLOCATIONS
PLASTICITY
PHASE TRANSFORMATION
MOLECULAR DYNAMICS
title_short Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
title_full Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
title_fullStr Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
title_full_unstemmed Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
title_sort Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy
dc.creator.none.fl_str_mv Alabd Alhafez, Iyad
Deluigi, Orlando Raul
Tramontina Videla, Diego Ramiro
Valencia, Felipe
Merkert, Nina
Farkas, Diana
Caro, Alfredo
Urbassek, Herbert M.
Bringa, Eduardo Marcial
author Alabd Alhafez, Iyad
author_facet Alabd Alhafez, Iyad
Deluigi, Orlando Raul
Tramontina Videla, Diego Ramiro
Valencia, Felipe
Merkert, Nina
Farkas, Diana
Caro, Alfredo
Urbassek, Herbert M.
Bringa, Eduardo Marcial
author_role author
author2 Deluigi, Orlando Raul
Tramontina Videla, Diego Ramiro
Valencia, Felipe
Merkert, Nina
Farkas, Diana
Caro, Alfredo
Urbassek, Herbert M.
Bringa, Eduardo Marcial
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv HIGH ENTROPHY ALLOYS
NANOINDENTATION
DISLOCATIONS
PLASTICITY
PHASE TRANSFORMATION
MOLECULAR DYNAMICS
topic HIGH ENTROPHY ALLOYS
NANOINDENTATION
DISLOCATIONS
PLASTICITY
PHASE TRANSFORMATION
MOLECULAR DYNAMICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The plastic response of a dual-phase high-entropy alloy to nanoindentation is studied using molecular dynamics simulation. The sample has a bicontinuous lamellar structure consisting of an equiatomic FeNiCrCo fcc phase and an Al50(FeNiCrCo)50 bcc/B2 phase. Its large size (28 million atoms) allows comparison of indentations into an fcc lamella, a bcc lamella and on an fcc/bcc interface. In addition, the lamella thickness of 20–30 nm allows for extensive dislocation plasticity both in the fcc and the bcc phase. We find that the hardness of the alloy at the interphase boundary is not a simple average of the hardness of the lamellae. The plasticity is mostly dislocation controlled, and twinning is relevant only in the fcc phase. Phase transformations do not occur and – in contrast to previous studies – even amorphization is negligible. Dislocation pile-ups are observed in the fcc phase next to the interface. Shear strain is not easily transmitted – in the form of dislocations or stacking faults – across phase boundaries
Fil: Alabd Alhafez, Iyad. Clausthal University Of Technology; Alemania
Fil: Deluigi, Orlando Raul. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza; Argentina
Fil: Tramontina Videla, Diego Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza; Argentina
Fil: Valencia, Felipe. Universidad Católica de Maule; Chile
Fil: Merkert, Nina. Clausthal University of Technology; Alemania
Fil: Farkas, Diana. No especifíca;
Fil: Caro, Alfredo. The George Washington University; Estados Unidos
Fil: Urbassek, Herbert M.. Clausthal University Of Technology; Alemania
Fil: Bringa, Eduardo Marcial. Universidad de Mendoza; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The plastic response of a dual-phase high-entropy alloy to nanoindentation is studied using molecular dynamics simulation. The sample has a bicontinuous lamellar structure consisting of an equiatomic FeNiCrCo fcc phase and an Al50(FeNiCrCo)50 bcc/B2 phase. Its large size (28 million atoms) allows comparison of indentations into an fcc lamella, a bcc lamella and on an fcc/bcc interface. In addition, the lamella thickness of 20–30 nm allows for extensive dislocation plasticity both in the fcc and the bcc phase. We find that the hardness of the alloy at the interphase boundary is not a simple average of the hardness of the lamellae. The plasticity is mostly dislocation controlled, and twinning is relevant only in the fcc phase. Phase transformations do not occur and – in contrast to previous studies – even amorphization is negligible. Dislocation pile-ups are observed in the fcc phase next to the interface. Shear strain is not easily transmitted – in the form of dislocations or stacking faults – across phase boundaries
publishDate 2025
dc.date.none.fl_str_mv 2025-07
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/11336/282466
Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Tramontina Videla, Diego Ramiro; Valencia, Felipe; Merkert, Nina; et al.; Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy; Elsevier; Journal of Materials Research and Technology; 37; 7-2025; 1406-1417
2238-7854
CONICET Digital
CONICET
url http://hdl.handle.net/11336/282466
identifier_str_mv Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Tramontina Videla, Diego Ramiro; Valencia, Felipe; Merkert, Nina; et al.; Nanoindentation into a dual-phase bicontinuous lamellar high-entropy alloy; Elsevier; Journal of Materials Research and Technology; 37; 7-2025; 1406-1417
2238-7854
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://linkinghub.elsevier.com/retrieve/pii/S2238785425014139
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmrt.2025.05.257
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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_ 1862631601475682304
score 13.203462

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