Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation

Autores
Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Merkert, Nina; Urbassek, Herbert M.; Bringa, Eduardo Marcial
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The impact of nanoclusters on a high-entropy alloy (HEA) of the same material is studied using molecular dynamics simulation. Both a bcc (HfNbTaTiZr) and an fcc (FeNiCrCoCu) HEA are investigated. The system sizes are large enough (almost 30 millions atoms) to contain the plasticity formed by the nanocluster (30 nm diameter) at 1 km/s speed. Both the cluster and the target are initially single-crystalline. Bombardment induces a crater and extensive dislocation plasticity in both materials. The projectile is strongly deformed by the impact and the prevalence of easy slip directions render its shape strongly anisotropic. We analyze the hardness in the impact region using simulated nanoindentation. The projectile has lost hardness due to the intense defect formation; however, the target material under the crater has hardened by the impact, in particular for the bcc HEA. In addition, the impact leads to subgrain formation both in the projectile and in the target material under the crater. The grains have diameters of typically 8 nm, i.e., one quarter of the projectile. Subgrain formation is more pronounced for the bcc HEA; in this material, we studied the velocity dependence and found that the grain number increases with projectile velocity. Multiple impacts would lead to surface restructuring and enhanced surface hardness.
Fil: Alabd Alhafez, Iyad. Technische Universität Clausthal; Alemania
Fil: Deluigi, Orlando Raul. Universidad de Mendoza. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Merkert, Nina. Technische Universität Clausthal; Alemania
Fil: Urbassek, Herbert M.. Technische Universität Kaiserslautern; Alemania
Fil: Bringa, Eduardo Marcial. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza. Facultad de Ingenieria; Argentina
Materia
HIGH ENTROPY ALLOYS
CLUSTER IMPACT
MOLECULAR DYNAMIC
PLASTICITY
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:11336/285786
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formationAlabd Alhafez, IyadDeluigi, Orlando RaulMerkert, NinaUrbassek, Herbert M.Bringa, Eduardo MarcialHIGH ENTROPY ALLOYSCLUSTER IMPACTMOLECULAR DYNAMICPLASTICITYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The impact of nanoclusters on a high-entropy alloy (HEA) of the same material is studied using molecular dynamics simulation. Both a bcc (HfNbTaTiZr) and an fcc (FeNiCrCoCu) HEA are investigated. The system sizes are large enough (almost 30 millions atoms) to contain the plasticity formed by the nanocluster (30 nm diameter) at 1 km/s speed. Both the cluster and the target are initially single-crystalline. Bombardment induces a crater and extensive dislocation plasticity in both materials. The projectile is strongly deformed by the impact and the prevalence of easy slip directions render its shape strongly anisotropic. We analyze the hardness in the impact region using simulated nanoindentation. The projectile has lost hardness due to the intense defect formation; however, the target material under the crater has hardened by the impact, in particular for the bcc HEA. In addition, the impact leads to subgrain formation both in the projectile and in the target material under the crater. The grains have diameters of typically 8 nm, i.e., one quarter of the projectile. Subgrain formation is more pronounced for the bcc HEA; in this material, we studied the velocity dependence and found that the grain number increases with projectile velocity. Multiple impacts would lead to surface restructuring and enhanced surface hardness.Fil: Alabd Alhafez, Iyad. Technische Universität Clausthal; AlemaniaFil: Deluigi, Orlando Raul. Universidad de Mendoza. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Merkert, Nina. Technische Universität Clausthal; AlemaniaFil: Urbassek, Herbert M.. Technische Universität Kaiserslautern; AlemaniaFil: Bringa, Eduardo Marcial. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza. Facultad de Ingenieria; ArgentinaElsevier2026-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/285786Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Merkert, Nina; Urbassek, Herbert M.; Bringa, Eduardo Marcial; Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation; Elsevier; Journal of Materials Research and Technology; 42; 3-2026; 104-1122238-7854CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S2238785426005855info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmrt.2026.03.093info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T14:40:24Zoai:ri.conicet.gov.ar:11336/285786instacron: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:34982026-08-25 14:40:25.051CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
title Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
spellingShingle Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
Alabd Alhafez, Iyad
HIGH ENTROPY ALLOYS
CLUSTER IMPACT
MOLECULAR DYNAMIC
PLASTICITY
title_short Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
title_full Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
title_fullStr Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
title_full_unstemmed Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
title_sort Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation
dc.creator.none.fl_str_mv Alabd Alhafez, Iyad
Deluigi, Orlando Raul
Merkert, Nina
Urbassek, Herbert M.
Bringa, Eduardo Marcial
author Alabd Alhafez, Iyad
author_facet Alabd Alhafez, Iyad
Deluigi, Orlando Raul
Merkert, Nina
Urbassek, Herbert M.
Bringa, Eduardo Marcial
author_role author
author2 Deluigi, Orlando Raul
Merkert, Nina
Urbassek, Herbert M.
Bringa, Eduardo Marcial
author2_role author
author
author
author
dc.subject.none.fl_str_mv HIGH ENTROPY ALLOYS
CLUSTER IMPACT
MOLECULAR DYNAMIC
PLASTICITY
topic HIGH ENTROPY ALLOYS
CLUSTER IMPACT
MOLECULAR DYNAMIC
PLASTICITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The impact of nanoclusters on a high-entropy alloy (HEA) of the same material is studied using molecular dynamics simulation. Both a bcc (HfNbTaTiZr) and an fcc (FeNiCrCoCu) HEA are investigated. The system sizes are large enough (almost 30 millions atoms) to contain the plasticity formed by the nanocluster (30 nm diameter) at 1 km/s speed. Both the cluster and the target are initially single-crystalline. Bombardment induces a crater and extensive dislocation plasticity in both materials. The projectile is strongly deformed by the impact and the prevalence of easy slip directions render its shape strongly anisotropic. We analyze the hardness in the impact region using simulated nanoindentation. The projectile has lost hardness due to the intense defect formation; however, the target material under the crater has hardened by the impact, in particular for the bcc HEA. In addition, the impact leads to subgrain formation both in the projectile and in the target material under the crater. The grains have diameters of typically 8 nm, i.e., one quarter of the projectile. Subgrain formation is more pronounced for the bcc HEA; in this material, we studied the velocity dependence and found that the grain number increases with projectile velocity. Multiple impacts would lead to surface restructuring and enhanced surface hardness.
Fil: Alabd Alhafez, Iyad. Technische Universität Clausthal; Alemania
Fil: Deluigi, Orlando Raul. Universidad de Mendoza. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Merkert, Nina. Technische Universität Clausthal; Alemania
Fil: Urbassek, Herbert M.. Technische Universität Kaiserslautern; Alemania
Fil: Bringa, Eduardo Marcial. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Mendoza. Facultad de Ingenieria; Argentina
description The impact of nanoclusters on a high-entropy alloy (HEA) of the same material is studied using molecular dynamics simulation. Both a bcc (HfNbTaTiZr) and an fcc (FeNiCrCoCu) HEA are investigated. The system sizes are large enough (almost 30 millions atoms) to contain the plasticity formed by the nanocluster (30 nm diameter) at 1 km/s speed. Both the cluster and the target are initially single-crystalline. Bombardment induces a crater and extensive dislocation plasticity in both materials. The projectile is strongly deformed by the impact and the prevalence of easy slip directions render its shape strongly anisotropic. We analyze the hardness in the impact region using simulated nanoindentation. The projectile has lost hardness due to the intense defect formation; however, the target material under the crater has hardened by the impact, in particular for the bcc HEA. In addition, the impact leads to subgrain formation both in the projectile and in the target material under the crater. The grains have diameters of typically 8 nm, i.e., one quarter of the projectile. Subgrain formation is more pronounced for the bcc HEA; in this material, we studied the velocity dependence and found that the grain number increases with projectile velocity. Multiple impacts would lead to surface restructuring and enhanced surface hardness.
publishDate 2026
dc.date.none.fl_str_mv 2026-03
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/11336/285786
Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Merkert, Nina; Urbassek, Herbert M.; Bringa, Eduardo Marcial; Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation; Elsevier; Journal of Materials Research and Technology; 42; 3-2026; 104-112
2238-7854
CONICET Digital
CONICET
url http://hdl.handle.net/11336/285786
identifier_str_mv Alabd Alhafez, Iyad; Deluigi, Orlando Raul; Merkert, Nina; Urbassek, Herbert M.; Bringa, Eduardo Marcial; Cluster impact into high-entropy alloys: Deformation, hardness changes, and subgrain formation; Elsevier; Journal of Materials Research and Technology; 42; 3-2026; 104-112
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/S2238785426005855
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmrt.2026.03.093
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
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
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score 13.265058

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