Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures

Mechanical spectroscopy (damping and elastic modulus as a function of temperature) and transmission electron microscopy studies have been performed in high purity polycrystalline molybdenum plastically deformed to different values of tensile and torsion strain. Mechanical spectroscopy measurements w...

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Autores: Lambri, Osvaldo Agustin F., Bonifacich, Federico Guillermo, Bozzano, Patricia Beatriz, Zelada, Griselda Irene, Plazaola, F, García, J.A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/30248
Acceso en línea:http://hdl.handle.net/11336/30248
Access Level:acceso abierto
Palabra clave:Molybdenum
Grain Boundary Dislocation Mobility
Vacancies
Mechanical Spectroscopy
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spelling Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperaturesLambri, Osvaldo Agustin F.Bonifacich, Federico GuillermoBozzano, Patricia BeatrizZelada, Griselda IrenePlazaola, FGarcía, J.A.MolybdenumGrain Boundary Dislocation MobilityVacanciesMechanical SpectroscopyMechanical spectroscopy (damping and elastic modulus as a function of temperature) and transmission electron microscopy studies have been performed in high purity polycrystalline molybdenum plastically deformed to different values of tensile and torsion strain. Mechanical spectroscopy measurements were performed from room temperature up to 1285 K. A relaxation peak in polycrystalline molybdenum related to the movement of dislocations into lower energy configurations near grain boundaries has been discovered to appear around 1170 K. The activation energy of the peak is 4.2 eV ± 0.5 eV. This relaxation phenomenon involves the interaction between vacancies and mobile dislocations near the grain boundaries. It should be highlighted that this relaxation process is controlled by the arrangement of vacancies and dislocations which occur at temperature below 1070 KFil: Lambri, Osvaldo Agustin F.. Universidad Nacional de Rosario. Facultad de Cs.exactas Ingeniería y Agrimensura. No Declara. Laboratorio de Materiales Ceramicos; ArgentinaFil: Bonifacich, Federico Guillermo. Universidad Nacional de Rosario. Facultad de Cs.exactas Ingeniería y Agrimensura. No Declara. Laboratorio de Materiales Ceramicos; ArgentinaFil: Bozzano, Patricia Beatriz. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; ArgentinaFil: Zelada, Griselda Irene. Universidad Nacional de Rosario. Facultad de Cs.exactas Ingeniería y Agrimensura. No Declara. Laboratorio de Materiales Ceramicos; ArgentinaFil: Plazaola, F. Universidad del País Vasco; EspañaFil: García, J.A.. Universidad del País Vasco; EspañaElsevier Science2014-06info: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/11336/30248Lambri, Osvaldo Agustin F.; Bonifacich, Federico Guillermo; Bozzano, Patricia Beatriz; Zelada, Griselda Irene; Plazaola, F; et al.; Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures; Elsevier Science; Journal of Nuclear Materials; 453; 1-3; 6-2014; 1-70022-3115CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jnucmat.2014.06.027info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022311514003845info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:59:53Zoai:ri.conicet.gov.ar:11336/30248instacron: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 13:59:53.397CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
title Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
spellingShingle Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
Lambri, Osvaldo Agustin F.
Molybdenum
Grain Boundary Dislocation Mobility
Vacancies
Mechanical Spectroscopy
title_short Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
title_full Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
title_fullStr Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
title_full_unstemmed Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
title_sort Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
dc.creator.none.fl_str_mv Lambri, Osvaldo Agustin F.
Bonifacich, Federico Guillermo
Bozzano, Patricia Beatriz
Zelada, Griselda Irene
Plazaola, F
García, J.A.
author Lambri, Osvaldo Agustin F.
author_facet Lambri, Osvaldo Agustin F.
Bonifacich, Federico Guillermo
Bozzano, Patricia Beatriz
Zelada, Griselda Irene
Plazaola, F
García, J.A.
author_role author
author2 Bonifacich, Federico Guillermo
Bozzano, Patricia Beatriz
Zelada, Griselda Irene
Plazaola, F
García, J.A.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Molybdenum
Grain Boundary Dislocation Mobility
Vacancies
Mechanical Spectroscopy
topic Molybdenum
Grain Boundary Dislocation Mobility
Vacancies
Mechanical Spectroscopy
description Mechanical spectroscopy (damping and elastic modulus as a function of temperature) and transmission electron microscopy studies have been performed in high purity polycrystalline molybdenum plastically deformed to different values of tensile and torsion strain. Mechanical spectroscopy measurements were performed from room temperature up to 1285 K. A relaxation peak in polycrystalline molybdenum related to the movement of dislocations into lower energy configurations near grain boundaries has been discovered to appear around 1170 K. The activation energy of the peak is 4.2 eV ± 0.5 eV. This relaxation phenomenon involves the interaction between vacancies and mobile dislocations near the grain boundaries. It should be highlighted that this relaxation process is controlled by the arrangement of vacancies and dislocations which occur at temperature below 1070 K
publishDate 2014
dc.date.none.fl_str_mv 2014-06
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/11336/30248
Lambri, Osvaldo Agustin F.; Bonifacich, Federico Guillermo; Bozzano, Patricia Beatriz; Zelada, Griselda Irene; Plazaola, F; et al.; Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures; Elsevier Science; Journal of Nuclear Materials; 453; 1-3; 6-2014; 1-7
0022-3115
CONICET Digital
CONICET
url http://hdl.handle.net/11336/30248
identifier_str_mv Lambri, Osvaldo Agustin F.; Bonifacich, Federico Guillermo; Bozzano, Patricia Beatriz; Zelada, Griselda Irene; Plazaola, F; et al.; Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures; Elsevier Science; Journal of Nuclear Materials; 453; 1-3; 6-2014; 1-7
0022-3115
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jnucmat.2014.06.027
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022311514003845
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
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score 15.812455

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