Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy

Detalhes bibliográficos
Autor(a) principal: Daer,Shimeni Baptista
Data de Publicação: 2018
Outros Autores: Paula,Andersan, Vieira,Luiz Carlos Almeida, Teixeira,Edir Neves, Otubo,Jorge, Fernandes,Francisco Manuel Braz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000100102
Resumo: The present work studied the influence of annealing on a Ni-Ti alloy submitted to uniaxial compression. The stress-strain curve under compression showed the absence of the Stress-Induced-Martensite (SIM) plateau and 42% of remaining austenitic phase (B2). identified by the Electron Backscattered Diffraction (EBSD) technique on a Scanning Electronic Microscope (SEM). Annealing at 150 ºC increased the volume fraction of austenite to 70%. Annealing at 200 ºC reduced the volume fraction of austenite to 33% and increased the classical Vickers hardness and the dynamic elastoplastic hardness. This increase suggests the presence of a phase with higher indentation resistance, which can be the R phase reported in the literature. Annealing at 250 ºC decreased the classical Vickers hardness and the dynamic elastoplastic hardness, probably due to recovery. Annealing at 300 ºC advanced the recovery process and promoted some recrystallization, as suggested by the large standard deviation observed in the hardness results.
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spelling Recovery Mechanisms in a Compressed Ni-Ti Superelastic AlloyNitinolcompressionrecoveryultramicrohardnessEBSDThe present work studied the influence of annealing on a Ni-Ti alloy submitted to uniaxial compression. The stress-strain curve under compression showed the absence of the Stress-Induced-Martensite (SIM) plateau and 42% of remaining austenitic phase (B2). identified by the Electron Backscattered Diffraction (EBSD) technique on a Scanning Electronic Microscope (SEM). Annealing at 150 ºC increased the volume fraction of austenite to 70%. Annealing at 200 ºC reduced the volume fraction of austenite to 33% and increased the classical Vickers hardness and the dynamic elastoplastic hardness. This increase suggests the presence of a phase with higher indentation resistance, which can be the R phase reported in the literature. Annealing at 250 ºC decreased the classical Vickers hardness and the dynamic elastoplastic hardness, probably due to recovery. Annealing at 300 ºC advanced the recovery process and promoted some recrystallization, as suggested by the large standard deviation observed in the hardness results.ABM, ABC, ABPol2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000100102Materials Research v.21 n.1 2018reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-0523info:eu-repo/semantics/openAccessDaer,Shimeni BaptistaPaula,AndersanVieira,Luiz Carlos AlmeidaTeixeira,Edir NevesOtubo,JorgeFernandes,Francisco Manuel Brazeng2018-05-11T00:00:00Zoai:scielo:S1516-14392018000100102Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-05-11T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
title Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
spellingShingle Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
Daer,Shimeni Baptista
Nitinol
compression
recovery
ultramicrohardness
EBSD
title_short Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
title_full Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
title_fullStr Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
title_full_unstemmed Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
title_sort Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
author Daer,Shimeni Baptista
author_facet Daer,Shimeni Baptista
Paula,Andersan
Vieira,Luiz Carlos Almeida
Teixeira,Edir Neves
Otubo,Jorge
Fernandes,Francisco Manuel Braz
author_role author
author2 Paula,Andersan
Vieira,Luiz Carlos Almeida
Teixeira,Edir Neves
Otubo,Jorge
Fernandes,Francisco Manuel Braz
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Daer,Shimeni Baptista
Paula,Andersan
Vieira,Luiz Carlos Almeida
Teixeira,Edir Neves
Otubo,Jorge
Fernandes,Francisco Manuel Braz
dc.subject.por.fl_str_mv Nitinol
compression
recovery
ultramicrohardness
EBSD
topic Nitinol
compression
recovery
ultramicrohardness
EBSD
description The present work studied the influence of annealing on a Ni-Ti alloy submitted to uniaxial compression. The stress-strain curve under compression showed the absence of the Stress-Induced-Martensite (SIM) plateau and 42% of remaining austenitic phase (B2). identified by the Electron Backscattered Diffraction (EBSD) technique on a Scanning Electronic Microscope (SEM). Annealing at 150 ºC increased the volume fraction of austenite to 70%. Annealing at 200 ºC reduced the volume fraction of austenite to 33% and increased the classical Vickers hardness and the dynamic elastoplastic hardness. This increase suggests the presence of a phase with higher indentation resistance, which can be the R phase reported in the literature. Annealing at 250 ºC decreased the classical Vickers hardness and the dynamic elastoplastic hardness, probably due to recovery. Annealing at 300 ºC advanced the recovery process and promoted some recrystallization, as suggested by the large standard deviation observed in the hardness results.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000100102
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000100102
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2017-0523
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.21 n.1 2018
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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