The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel

Detalhes bibliográficos
Autor(a) principal: Käfer, Karine Andrea
Data de Publicação: 2018
Outros Autores: Bernardi, Heide Heloise, Santos, Osmar de Sousa, Otubo, Larissa, Lima, Nelson Batista de, Otubo, Jorge
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/34596
Resumo: In the current work, XRD, SEM, EBSD and TEM techniques were used to evaluate the microstructure of stainless Fe-Mn-Si-Cr-Ni-Co shape memory steel processed by ECAE and annealed for one hour at temperatures ranging from 650ºC to 950ºC. The results were then correlated with the mechanical and shape-memory properties of the steel. It was observed that the samples containing large grains and a microstructure free of defects or precipitates presented a high volume fraction of multi-variant thermal martensite and stress-induced martensite, resulting in good shape recovery, owing to the memory effect. The grain refinement and precipitation of second-phase particles decreased the volume fraction and number of martensite variants and considerably increased the mechanical resistance, enhancing the elastic shape recovery. It was shown that shape memory properties were essentially related to the mechanical resistance of the matrix, which in turn was related to the microstructure.
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spelling The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steelStainless shape memory steelEqual Channel Angular Extrusion (ECAE)Grain sizeSecond-phase particlesMartensitic transformationIn the current work, XRD, SEM, EBSD and TEM techniques were used to evaluate the microstructure of stainless Fe-Mn-Si-Cr-Ni-Co shape memory steel processed by ECAE and annealed for one hour at temperatures ranging from 650ºC to 950ºC. The results were then correlated with the mechanical and shape-memory properties of the steel. It was observed that the samples containing large grains and a microstructure free of defects or precipitates presented a high volume fraction of multi-variant thermal martensite and stress-induced martensite, resulting in good shape recovery, owing to the memory effect. The grain refinement and precipitation of second-phase particles decreased the volume fraction and number of martensite variants and considerably increased the mechanical resistance, enhancing the elastic shape recovery. It was shown that shape memory properties were essentially related to the mechanical resistance of the matrix, which in turn was related to the microstructure.2019-06-04T12:33:12Z2019-06-04T12:33:12Z2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfKÄFER, K. A. et al. The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel. Materials Research, São Carlos, v. 21, n. 5, 2018.http://repositorio.ufla.br/jspui/handle/1/34596Materials Researchreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessKäfer, Karine AndreaBernardi, Heide HeloiseSantos, Osmar de SousaOtubo, LarissaLima, Nelson Batista deOtubo, Jorgeeng2019-06-04T12:33:13Zoai:localhost:1/34596Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2019-06-04T12:33:13Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
title The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
spellingShingle The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
Käfer, Karine Andrea
Stainless shape memory steel
Equal Channel Angular Extrusion (ECAE)
Grain size
Second-phase particles
Martensitic transformation
title_short The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
title_full The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
title_fullStr The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
title_full_unstemmed The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
title_sort The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
author Käfer, Karine Andrea
author_facet Käfer, Karine Andrea
Bernardi, Heide Heloise
Santos, Osmar de Sousa
Otubo, Larissa
Lima, Nelson Batista de
Otubo, Jorge
author_role author
author2 Bernardi, Heide Heloise
Santos, Osmar de Sousa
Otubo, Larissa
Lima, Nelson Batista de
Otubo, Jorge
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Käfer, Karine Andrea
Bernardi, Heide Heloise
Santos, Osmar de Sousa
Otubo, Larissa
Lima, Nelson Batista de
Otubo, Jorge
dc.subject.por.fl_str_mv Stainless shape memory steel
Equal Channel Angular Extrusion (ECAE)
Grain size
Second-phase particles
Martensitic transformation
topic Stainless shape memory steel
Equal Channel Angular Extrusion (ECAE)
Grain size
Second-phase particles
Martensitic transformation
description In the current work, XRD, SEM, EBSD and TEM techniques were used to evaluate the microstructure of stainless Fe-Mn-Si-Cr-Ni-Co shape memory steel processed by ECAE and annealed for one hour at temperatures ranging from 650ºC to 950ºC. The results were then correlated with the mechanical and shape-memory properties of the steel. It was observed that the samples containing large grains and a microstructure free of defects or precipitates presented a high volume fraction of multi-variant thermal martensite and stress-induced martensite, resulting in good shape recovery, owing to the memory effect. The grain refinement and precipitation of second-phase particles decreased the volume fraction and number of martensite variants and considerably increased the mechanical resistance, enhancing the elastic shape recovery. It was shown that shape memory properties were essentially related to the mechanical resistance of the matrix, which in turn was related to the microstructure.
publishDate 2018
dc.date.none.fl_str_mv 2018
2019-06-04T12:33:12Z
2019-06-04T12:33:12Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv KÄFER, K. A. et al. The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel. Materials Research, São Carlos, v. 21, n. 5, 2018.
http://repositorio.ufla.br/jspui/handle/1/34596
identifier_str_mv KÄFER, K. A. et al. The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel. Materials Research, São Carlos, v. 21, n. 5, 2018.
url http://repositorio.ufla.br/jspui/handle/1/34596
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Materials Research
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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