Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
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=S1516-14392018000721106 |
Resumo: | The present research work examines the microstructural arrangements formed during the transient solidification of eutectic Sn-0.2wt.%Ni and hypereutectic Sn-0.5wt.%Ni alloys. Also, it examines their respective correlations with solidification thermal parameters: eutectic growth rate (VE) and eutectic cooling rate (ṪE); length scales of matrix and eutectic phases: microstructural spacings and the corresponding tensile properties: ductility and strength. Both alloys were directionally solidified upwards under unsteady-state regime, and characterized by optical and scanning electron microscopy. Concerning the hypereutectic Sn-0.5wt.%Ni, the increase in Ni content is shown to influence both thermal behavior and cellular spacing (λC). The NiSn4 intermetallics is present in the eutectic mixture of both alloys, whilst in the Sn-0.5wt.%Ni alloy the primary phase has been identified by SEM-EDS as the Ni3Sn4 intermetallics. A β-Sn morphological cellular/dendritic transition occurs in the 0.2wt.%Ni eutectic alloy for ṪE> 1.2K/s. Despite that, regular cells in the hypereutectic alloy (0.5wt.%Ni) turns into plate-like cells for ṪE> 1.4K/s. If considered a reference cellular spacing about 20μm (i.e.,λ(c-1/2=0.22), the samples associated with the Sn-0.5wt.%Ni alloy are shown to be associated with higher tensile strengths, but much lower ductility as compared with the corresponding results of the eutectic alloy. |
id |
ABMABCABPOL-1_dffa30a91e3c3d6d918f9ded3e2b6369 |
---|---|
oai_identifier_str |
oai:scielo:S1516-14392018000721106 |
network_acronym_str |
ABMABCABPOL-1 |
network_name_str |
Materials research (São Carlos. Online) |
repository_id_str |
|
spelling |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni AlloysLead-free alloysTransient solidificationMicrostructureIntermetallicsTensile propertiesWettabilityThe present research work examines the microstructural arrangements formed during the transient solidification of eutectic Sn-0.2wt.%Ni and hypereutectic Sn-0.5wt.%Ni alloys. Also, it examines their respective correlations with solidification thermal parameters: eutectic growth rate (VE) and eutectic cooling rate (ṪE); length scales of matrix and eutectic phases: microstructural spacings and the corresponding tensile properties: ductility and strength. Both alloys were directionally solidified upwards under unsteady-state regime, and characterized by optical and scanning electron microscopy. Concerning the hypereutectic Sn-0.5wt.%Ni, the increase in Ni content is shown to influence both thermal behavior and cellular spacing (λC). The NiSn4 intermetallics is present in the eutectic mixture of both alloys, whilst in the Sn-0.5wt.%Ni alloy the primary phase has been identified by SEM-EDS as the Ni3Sn4 intermetallics. A β-Sn morphological cellular/dendritic transition occurs in the 0.2wt.%Ni eutectic alloy for ṪE> 1.2K/s. Despite that, regular cells in the hypereutectic alloy (0.5wt.%Ni) turns into plate-like cells for ṪE> 1.4K/s. If considered a reference cellular spacing about 20μm (i.e.,λ(c-1/2=0.22), the samples associated with the Sn-0.5wt.%Ni alloy are shown to be associated with higher tensile strengths, but much lower ductility as compared with the corresponding results of the eutectic alloy.ABM, ABC, ABPol2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000721106Materials Research v.21 suppl.1 2018reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-1099info:eu-repo/semantics/openAccessCruz,Clarissa Barros daKakitani,RafaelXavierb,Marcella Gautê CavalcanteSilva,Bismarck LuizGarcia,AmauriCheung,NoéSpinelli,José Eduardoeng2019-01-11T00:00:00Zoai:scielo:S1516-14392018000721106Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2019-01-11T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
title |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
spellingShingle |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys Cruz,Clarissa Barros da Lead-free alloys Transient solidification Microstructure Intermetallics Tensile properties Wettability |
title_short |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
title_full |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
title_fullStr |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
title_full_unstemmed |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
title_sort |
Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys |
author |
Cruz,Clarissa Barros da |
author_facet |
Cruz,Clarissa Barros da Kakitani,Rafael Xavierb,Marcella Gautê Cavalcante Silva,Bismarck Luiz Garcia,Amauri Cheung,Noé Spinelli,José Eduardo |
author_role |
author |
author2 |
Kakitani,Rafael Xavierb,Marcella Gautê Cavalcante Silva,Bismarck Luiz Garcia,Amauri Cheung,Noé Spinelli,José Eduardo |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Cruz,Clarissa Barros da Kakitani,Rafael Xavierb,Marcella Gautê Cavalcante Silva,Bismarck Luiz Garcia,Amauri Cheung,Noé Spinelli,José Eduardo |
dc.subject.por.fl_str_mv |
Lead-free alloys Transient solidification Microstructure Intermetallics Tensile properties Wettability |
topic |
Lead-free alloys Transient solidification Microstructure Intermetallics Tensile properties Wettability |
description |
The present research work examines the microstructural arrangements formed during the transient solidification of eutectic Sn-0.2wt.%Ni and hypereutectic Sn-0.5wt.%Ni alloys. Also, it examines their respective correlations with solidification thermal parameters: eutectic growth rate (VE) and eutectic cooling rate (ṪE); length scales of matrix and eutectic phases: microstructural spacings and the corresponding tensile properties: ductility and strength. Both alloys were directionally solidified upwards under unsteady-state regime, and characterized by optical and scanning electron microscopy. Concerning the hypereutectic Sn-0.5wt.%Ni, the increase in Ni content is shown to influence both thermal behavior and cellular spacing (λC). The NiSn4 intermetallics is present in the eutectic mixture of both alloys, whilst in the Sn-0.5wt.%Ni alloy the primary phase has been identified by SEM-EDS as the Ni3Sn4 intermetallics. A β-Sn morphological cellular/dendritic transition occurs in the 0.2wt.%Ni eutectic alloy for ṪE> 1.2K/s. Despite that, regular cells in the hypereutectic alloy (0.5wt.%Ni) turns into plate-like cells for ṪE> 1.4K/s. If considered a reference cellular spacing about 20μm (i.e.,λ(c-1/2=0.22), the samples associated with the Sn-0.5wt.%Ni alloy are shown to be associated with higher tensile strengths, but much lower ductility as compared with the corresponding results of the eutectic alloy. |
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=S1516-14392018000721106 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000721106 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2017-1099 |
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 suppl.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 |
_version_ |
1754212674208530432 |