Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio

Autores
Macchi, Carlos Eugenio; Tolley, Alfredo Juan; Giovachini, Ricardo Hernán; Polmear, I. J.; Somoza, Alberto Horacio
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Effects of microalloying with Ag on the precipitation process in an Al-Cu-Mg alloy with high Mg:Cu ratio have been investigated during artificial ageing of the ternary and quaternary compositions Al-1.5 wt.%Cu-4 wt.%Mg(-0.5 wt.%Ag) at 175 °C, combining transmission electron microscopy and positron lifetime spectroscopy. In addition, coincidence Doppler broadening of the positron-electron annihilation radiation was used to provide information about the chemical environment surrounding vacancy-like defects. The results obtained for the silver-free alloy indicate that, immediately after quenching from the solution treatment temperature, vacancy v-Cu-Mg clusters are formed in the supersaturated solid solution. During the early stages of ageing these clusters become richer in Cu and Mg and laths of the S phase (Al2CuMg) nucleate preferentially on dislocation lines. Continued ageing led to gradual precipitation of an equi-axed phase in the matrix between the S phase laths which is believed to be the cubic Z phase thought previously to form only if silver is present. For the silver-containing Al-Cu-Mg alloy, v-Cu-Mg-Ag aggregates also form immediately after quenching and the solute transport mechanisms are the same. However, precipitation of the S phase is suppressed during ageing and the silver addition promotes accelerated formation of a finer dispersion of smaller equi-axed Z phase precipitates. For both alloys, no evidence was found that the Z phase is preceded by any pre-precipitate or GP zones. Combination of coincidence Doppler broadening and microanalysis results revealed the Z phase to have a Mg:Cu ratio of 2 which indicates that it differs from the well known T phase (Al6CuMg4) which the equilibrium phase diagram indicates should form in Al-Cu-Mg alloys with high Mg:Cu ratios. Additional ageing experiments at 240 °C showed that neither the Z phase or T phase are formed in the ternary alloy, but only precipitates of the S phase, while in the quaternary alloy the S phase is strongly suppressed and mainly Z phase precipitates are formed.
Fil: Macchi, Carlos Eugenio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Tolley, Alfredo Juan. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Giovachini, Ricardo Hernán. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Polmear, I. J.. Monash University; Australia
Fil: Somoza, Alberto Horacio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Materia
Age-Hardenable Alloys
Positron Annihilation Spectroscopy
Precipitation
Transmission Electron Microscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
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CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/50505
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network_name_str CONICET Digital (CONICET)
spelling Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratioMacchi, Carlos EugenioTolley, Alfredo JuanGiovachini, Ricardo HernánPolmear, I. J.Somoza, Alberto HoracioAge-Hardenable AlloysPositron Annihilation SpectroscopyPrecipitationTransmission Electron Microscopyhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Effects of microalloying with Ag on the precipitation process in an Al-Cu-Mg alloy with high Mg:Cu ratio have been investigated during artificial ageing of the ternary and quaternary compositions Al-1.5 wt.%Cu-4 wt.%Mg(-0.5 wt.%Ag) at 175 °C, combining transmission electron microscopy and positron lifetime spectroscopy. In addition, coincidence Doppler broadening of the positron-electron annihilation radiation was used to provide information about the chemical environment surrounding vacancy-like defects. The results obtained for the silver-free alloy indicate that, immediately after quenching from the solution treatment temperature, vacancy v-Cu-Mg clusters are formed in the supersaturated solid solution. During the early stages of ageing these clusters become richer in Cu and Mg and laths of the S phase (Al2CuMg) nucleate preferentially on dislocation lines. Continued ageing led to gradual precipitation of an equi-axed phase in the matrix between the S phase laths which is believed to be the cubic Z phase thought previously to form only if silver is present. For the silver-containing Al-Cu-Mg alloy, v-Cu-Mg-Ag aggregates also form immediately after quenching and the solute transport mechanisms are the same. However, precipitation of the S phase is suppressed during ageing and the silver addition promotes accelerated formation of a finer dispersion of smaller equi-axed Z phase precipitates. For both alloys, no evidence was found that the Z phase is preceded by any pre-precipitate or GP zones. Combination of coincidence Doppler broadening and microanalysis results revealed the Z phase to have a Mg:Cu ratio of 2 which indicates that it differs from the well known T phase (Al6CuMg4) which the equilibrium phase diagram indicates should form in Al-Cu-Mg alloys with high Mg:Cu ratios. Additional ageing experiments at 240 °C showed that neither the Z phase or T phase are formed in the ternary alloy, but only precipitates of the S phase, while in the quaternary alloy the S phase is strongly suppressed and mainly Z phase precipitates are formed.Fil: Macchi, Carlos Eugenio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Tolley, Alfredo Juan. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Giovachini, Ricardo Hernán. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Polmear, I. J.. Monash University; AustraliaFil: Somoza, Alberto Horacio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaPergamon-Elsevier Science Ltd2015-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/50505Macchi, Carlos Eugenio; Tolley, Alfredo Juan; Giovachini, Ricardo Hernán; Polmear, I. J.; Somoza, Alberto Horacio; Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio; Pergamon-Elsevier Science Ltd; Acta Materialia; 98; 7-2015; 275-2871359-6454CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1359645415005030info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2015.07.032info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:14:19Zoai:ri.conicet.gov.ar:11336/50505instacron: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:34982025-09-29 10:14:19.513CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
title Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
spellingShingle Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
Macchi, Carlos Eugenio
Age-Hardenable Alloys
Positron Annihilation Spectroscopy
Precipitation
Transmission Electron Microscopy
title_short Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
title_full Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
title_fullStr Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
title_full_unstemmed Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
title_sort Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio
dc.creator.none.fl_str_mv Macchi, Carlos Eugenio
Tolley, Alfredo Juan
Giovachini, Ricardo Hernán
Polmear, I. J.
Somoza, Alberto Horacio
author Macchi, Carlos Eugenio
author_facet Macchi, Carlos Eugenio
Tolley, Alfredo Juan
Giovachini, Ricardo Hernán
Polmear, I. J.
Somoza, Alberto Horacio
author_role author
author2 Tolley, Alfredo Juan
Giovachini, Ricardo Hernán
Polmear, I. J.
Somoza, Alberto Horacio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Age-Hardenable Alloys
Positron Annihilation Spectroscopy
Precipitation
Transmission Electron Microscopy
topic Age-Hardenable Alloys
Positron Annihilation Spectroscopy
Precipitation
Transmission Electron Microscopy
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Effects of microalloying with Ag on the precipitation process in an Al-Cu-Mg alloy with high Mg:Cu ratio have been investigated during artificial ageing of the ternary and quaternary compositions Al-1.5 wt.%Cu-4 wt.%Mg(-0.5 wt.%Ag) at 175 °C, combining transmission electron microscopy and positron lifetime spectroscopy. In addition, coincidence Doppler broadening of the positron-electron annihilation radiation was used to provide information about the chemical environment surrounding vacancy-like defects. The results obtained for the silver-free alloy indicate that, immediately after quenching from the solution treatment temperature, vacancy v-Cu-Mg clusters are formed in the supersaturated solid solution. During the early stages of ageing these clusters become richer in Cu and Mg and laths of the S phase (Al2CuMg) nucleate preferentially on dislocation lines. Continued ageing led to gradual precipitation of an equi-axed phase in the matrix between the S phase laths which is believed to be the cubic Z phase thought previously to form only if silver is present. For the silver-containing Al-Cu-Mg alloy, v-Cu-Mg-Ag aggregates also form immediately after quenching and the solute transport mechanisms are the same. However, precipitation of the S phase is suppressed during ageing and the silver addition promotes accelerated formation of a finer dispersion of smaller equi-axed Z phase precipitates. For both alloys, no evidence was found that the Z phase is preceded by any pre-precipitate or GP zones. Combination of coincidence Doppler broadening and microanalysis results revealed the Z phase to have a Mg:Cu ratio of 2 which indicates that it differs from the well known T phase (Al6CuMg4) which the equilibrium phase diagram indicates should form in Al-Cu-Mg alloys with high Mg:Cu ratios. Additional ageing experiments at 240 °C showed that neither the Z phase or T phase are formed in the ternary alloy, but only precipitates of the S phase, while in the quaternary alloy the S phase is strongly suppressed and mainly Z phase precipitates are formed.
Fil: Macchi, Carlos Eugenio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Tolley, Alfredo Juan. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Giovachini, Ricardo Hernán. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Polmear, I. J.. Monash University; Australia
Fil: Somoza, Alberto Horacio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
description Effects of microalloying with Ag on the precipitation process in an Al-Cu-Mg alloy with high Mg:Cu ratio have been investigated during artificial ageing of the ternary and quaternary compositions Al-1.5 wt.%Cu-4 wt.%Mg(-0.5 wt.%Ag) at 175 °C, combining transmission electron microscopy and positron lifetime spectroscopy. In addition, coincidence Doppler broadening of the positron-electron annihilation radiation was used to provide information about the chemical environment surrounding vacancy-like defects. The results obtained for the silver-free alloy indicate that, immediately after quenching from the solution treatment temperature, vacancy v-Cu-Mg clusters are formed in the supersaturated solid solution. During the early stages of ageing these clusters become richer in Cu and Mg and laths of the S phase (Al2CuMg) nucleate preferentially on dislocation lines. Continued ageing led to gradual precipitation of an equi-axed phase in the matrix between the S phase laths which is believed to be the cubic Z phase thought previously to form only if silver is present. For the silver-containing Al-Cu-Mg alloy, v-Cu-Mg-Ag aggregates also form immediately after quenching and the solute transport mechanisms are the same. However, precipitation of the S phase is suppressed during ageing and the silver addition promotes accelerated formation of a finer dispersion of smaller equi-axed Z phase precipitates. For both alloys, no evidence was found that the Z phase is preceded by any pre-precipitate or GP zones. Combination of coincidence Doppler broadening and microanalysis results revealed the Z phase to have a Mg:Cu ratio of 2 which indicates that it differs from the well known T phase (Al6CuMg4) which the equilibrium phase diagram indicates should form in Al-Cu-Mg alloys with high Mg:Cu ratios. Additional ageing experiments at 240 °C showed that neither the Z phase or T phase are formed in the ternary alloy, but only precipitates of the S phase, while in the quaternary alloy the S phase is strongly suppressed and mainly Z phase precipitates are formed.
publishDate 2015
dc.date.none.fl_str_mv 2015-07
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/11336/50505
Macchi, Carlos Eugenio; Tolley, Alfredo Juan; Giovachini, Ricardo Hernán; Polmear, I. J.; Somoza, Alberto Horacio; Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio; Pergamon-Elsevier Science Ltd; Acta Materialia; 98; 7-2015; 275-287
1359-6454
CONICET Digital
CONICET
url http://hdl.handle.net/11336/50505
identifier_str_mv Macchi, Carlos Eugenio; Tolley, Alfredo Juan; Giovachini, Ricardo Hernán; Polmear, I. J.; Somoza, Alberto Horacio; Influence of a microalloying addition of Ag on the precipitation kinetics of an Al-Cu-Mg alloy with high Mg:Cu ratio; Pergamon-Elsevier Science Ltd; Acta Materialia; 98; 7-2015; 275-287
1359-6454
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1359645415005030
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actamat.2015.07.032
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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 13.070432

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