The influence of microstructure and mechanical resistance on the shape memory of ecae processed stainless Fe-Mn-Si-Cr-Ni-Co steel
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
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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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 |
_version_ |
1815438983780368384 |