Subgrain and Cavity Development during Creep of Al-3.85%Mg

It is classically considered that the creep mechanisms for type M (e.g., pure Al) and type A alloys (e.g., Al–Mg alloys) are different. In previous studies, it is predicated that fractal dislocation structures build up during creep can unify the creep behavior of pure Al and Al–Mg alloys. So far, go...

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Autores: Isaac, A., Serrano-Munoz, I., Kostka, A., Widjaja, M.P., González-Doncel, Gaspar, Bruno, G., Fernández, Ricardo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/425012
Acceso en línea:http://hdl.handle.net/10261/425012
Access Level:acceso abierto
Palabra clave:Creep mechanisms
Al–Mg alloys
Fractal dislocation structures
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spelling Subgrain and Cavity Development during Creep of Al-3.85%MgIsaac, A.Serrano-Munoz, I.Kostka, A.Widjaja, M.P.González-Doncel, GasparBruno, G.Fernández, RicardoCreep mechanismsAl–Mg alloysFractal dislocation structuresIt is classically considered that the creep mechanisms for type M (e.g., pure Al) and type A alloys (e.g., Al–Mg alloys) are different. In previous studies, it is predicated that fractal dislocation structures build up during creep can unify the creep behavior of pure Al and Al–Mg alloys. So far, good agreement between model and experimental data for pure Al is obtained. In this work, an Al-3.85%Mg material crept at different strain levels (6%, 12%, 24%, and 35%) is analyzed by means of electron channelling contrast imaging. The formation of subgrains is observed at very large deformations (35%). Further examinations at 35% deformation, using electron backscatter diffraction, indicate that the subgrains and cavities tend to localize at regions where high intergranular stress mismatch is expected to occur. Laboratory X-ray computed tomography is used to analyze the evolution of cavities between 12% and 24% stages, indicating that the fractal dimension of the cavities smaller than 100 μm varies with creep strain, as a reflection of the evolution of dislocation distribution. It is explained how the present data feed the model of the creep behavior of Al-3.85%Mg.This study received funding from both Project PID2022-138383OB-I00 from MINECO in Spain and the Project 88887.507847/2020-00 from CAPES in Brazil.Peer reviewedJohn Wiley & SonsMinisterio de Economía y Competitividad (España)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2026202620252026info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/425012reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-138383OB-I00https://doi.org/10.1002/adem.202500263Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4250122026-05-22T06:33:51Z
dc.title.none.fl_str_mv Subgrain and Cavity Development during Creep of Al-3.85%Mg
title Subgrain and Cavity Development during Creep of Al-3.85%Mg
spellingShingle Subgrain and Cavity Development during Creep of Al-3.85%Mg
Isaac, A.
Creep mechanisms
Al–Mg alloys
Fractal dislocation structures
title_short Subgrain and Cavity Development during Creep of Al-3.85%Mg
title_full Subgrain and Cavity Development during Creep of Al-3.85%Mg
title_fullStr Subgrain and Cavity Development during Creep of Al-3.85%Mg
title_full_unstemmed Subgrain and Cavity Development during Creep of Al-3.85%Mg
title_sort Subgrain and Cavity Development during Creep of Al-3.85%Mg
dc.creator.none.fl_str_mv Isaac, A.
Serrano-Munoz, I.
Kostka, A.
Widjaja, M.P.
González-Doncel, Gaspar
Bruno, G.
Fernández, Ricardo
author Isaac, A.
author_facet Isaac, A.
Serrano-Munoz, I.
Kostka, A.
Widjaja, M.P.
González-Doncel, Gaspar
Bruno, G.
Fernández, Ricardo
author_role author
author2 Serrano-Munoz, I.
Kostka, A.
Widjaja, M.P.
González-Doncel, Gaspar
Bruno, G.
Fernández, Ricardo
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Creep mechanisms
Al–Mg alloys
Fractal dislocation structures
topic Creep mechanisms
Al–Mg alloys
Fractal dislocation structures
description It is classically considered that the creep mechanisms for type M (e.g., pure Al) and type A alloys (e.g., Al–Mg alloys) are different. In previous studies, it is predicated that fractal dislocation structures build up during creep can unify the creep behavior of pure Al and Al–Mg alloys. So far, good agreement between model and experimental data for pure Al is obtained. In this work, an Al-3.85%Mg material crept at different strain levels (6%, 12%, 24%, and 35%) is analyzed by means of electron channelling contrast imaging. The formation of subgrains is observed at very large deformations (35%). Further examinations at 35% deformation, using electron backscatter diffraction, indicate that the subgrains and cavities tend to localize at regions where high intergranular stress mismatch is expected to occur. Laboratory X-ray computed tomography is used to analyze the evolution of cavities between 12% and 24% stages, indicating that the fractal dimension of the cavities smaller than 100 μm varies with creep strain, as a reflection of the evolution of dislocation distribution. It is explained how the present data feed the model of the creep behavior of Al-3.85%Mg.
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/425012
url http://hdl.handle.net/10261/425012
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-138383OB-I00
https://doi.org/10.1002/adem.202500263
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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