Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting
Autor(a) principal: | |
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Data de Publicação: | 2014 |
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=S1516-14392014000600020 |
Resumo: | Rare earth elements reportedly improve high temperature strength and creep resistance of Mg alloys. In the present work, ZK60 Mg alloys containing different amounts (0.5, 1.5 and 2.5 wt.%) of rare earth additions were prepared by thixocasting and submitted to solution and ageing heat treatments (T4, T5 and T6). The as-cast and heat treated microstructures were investigated by scanning electron microscopy and hardness was evaluated as a function of heat treatment parameters. In the as-cast state, the alloys are formed by globular α-Mg grains reinforced by a network of composite Mg-Zn-RE precipitates with either smooth or lamellar/acicular morphologies. Solution of the smooth precipitates took place in alloys containing 0.5 and 1.5wt.%RE for T4-500 ºC but no precipitates were dissolved with T4-380 ºC. The optimum temperature for T5 and T6 was identified as 175 ºC, while T6-500 ºC led to the highest hardness, followed by T5 and T6-380 ºC, respectively. |
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Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid castingZK60rare earthage hardeningheat treatmentthixocastingRare earth elements reportedly improve high temperature strength and creep resistance of Mg alloys. In the present work, ZK60 Mg alloys containing different amounts (0.5, 1.5 and 2.5 wt.%) of rare earth additions were prepared by thixocasting and submitted to solution and ageing heat treatments (T4, T5 and T6). The as-cast and heat treated microstructures were investigated by scanning electron microscopy and hardness was evaluated as a function of heat treatment parameters. In the as-cast state, the alloys are formed by globular α-Mg grains reinforced by a network of composite Mg-Zn-RE precipitates with either smooth or lamellar/acicular morphologies. Solution of the smooth precipitates took place in alloys containing 0.5 and 1.5wt.%RE for T4-500 ºC but no precipitates were dissolved with T4-380 ºC. The optimum temperature for T5 and T6 was identified as 175 ºC, while T6-500 ºC led to the highest hardness, followed by T5 and T6-380 ºC, respectively.ABM, ABC, ABPol2014-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000600020Materials Research v.17 n.6 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1516-1439.266214info:eu-repo/semantics/openAccessSilva,Erenilton Pereira daBatista,Larissa FernandesCallegari,BrunaBuzolin,Ricardo HenriqueWarchomicka,FernandoRequena,Guillermo CarlosBrito,Pedro PaivaPinto,Haroldo Cavalcantieng2015-02-10T00:00:00Zoai:scielo:S1516-14392014000600020Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2015-02-10T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
title |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
spellingShingle |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting Silva,Erenilton Pereira da ZK60 rare earth age hardening heat treatment thixocasting |
title_short |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
title_full |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
title_fullStr |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
title_full_unstemmed |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
title_sort |
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting |
author |
Silva,Erenilton Pereira da |
author_facet |
Silva,Erenilton Pereira da Batista,Larissa Fernandes Callegari,Bruna Buzolin,Ricardo Henrique Warchomicka,Fernando Requena,Guillermo Carlos Brito,Pedro Paiva Pinto,Haroldo Cavalcanti |
author_role |
author |
author2 |
Batista,Larissa Fernandes Callegari,Bruna Buzolin,Ricardo Henrique Warchomicka,Fernando Requena,Guillermo Carlos Brito,Pedro Paiva Pinto,Haroldo Cavalcanti |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Silva,Erenilton Pereira da Batista,Larissa Fernandes Callegari,Bruna Buzolin,Ricardo Henrique Warchomicka,Fernando Requena,Guillermo Carlos Brito,Pedro Paiva Pinto,Haroldo Cavalcanti |
dc.subject.por.fl_str_mv |
ZK60 rare earth age hardening heat treatment thixocasting |
topic |
ZK60 rare earth age hardening heat treatment thixocasting |
description |
Rare earth elements reportedly improve high temperature strength and creep resistance of Mg alloys. In the present work, ZK60 Mg alloys containing different amounts (0.5, 1.5 and 2.5 wt.%) of rare earth additions were prepared by thixocasting and submitted to solution and ageing heat treatments (T4, T5 and T6). The as-cast and heat treated microstructures were investigated by scanning electron microscopy and hardness was evaluated as a function of heat treatment parameters. In the as-cast state, the alloys are formed by globular α-Mg grains reinforced by a network of composite Mg-Zn-RE precipitates with either smooth or lamellar/acicular morphologies. Solution of the smooth precipitates took place in alloys containing 0.5 and 1.5wt.%RE for T4-500 ºC but no precipitates were dissolved with T4-380 ºC. The optimum temperature for T5 and T6 was identified as 175 ºC, while T6-500 ºC led to the highest hardness, followed by T5 and T6-380 ºC, respectively. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12-01 |
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=S1516-14392014000600020 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000600020 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1516-1439.266214 |
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.17 n.6 2014 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_ |
1754212664236572672 |