Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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=S1516-14392019000300233 |
Resumo: | This work proposes studying the softening kinetics of aluminum alloy 7075-T6. Firstly, AA 7075 strips were overaged (300°C and 5 hours). Then, the overaged strips were cold-rolled at room temperature (45% in thickness reduction) and, after that, annealed at different temperatures (200°C and 250°C) and time intervals (30 minutes - 4 hours). By using polarized light microscopy, EBSD and Vickers hardness measurements, the softening mechanisms were determined and proper mathematical models (Kuhlmann, Johnson-Mehl-Avrami-Kolmogorov and Austin-Rickett) were used to analyse the experimental data. The results show that although almost all observed softening can be attributed to recovery, the phenomena is well described by using mathematical models for phase transformations (JMAK and Austin Riccket). In order to promote recrystallization of overaged AA 7075, an additional thickness reduction (75%) were used. These samples were annealed isocronically during 1 hour (100 - 400°C) and it was found that recrystallization only took place at 400°C. |
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Materials research (São Carlos. Online) |
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|
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Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075Aluminum alloy 7075annealingcold-rollingrecoveryrecrystallizationThis work proposes studying the softening kinetics of aluminum alloy 7075-T6. Firstly, AA 7075 strips were overaged (300°C and 5 hours). Then, the overaged strips were cold-rolled at room temperature (45% in thickness reduction) and, after that, annealed at different temperatures (200°C and 250°C) and time intervals (30 minutes - 4 hours). By using polarized light microscopy, EBSD and Vickers hardness measurements, the softening mechanisms were determined and proper mathematical models (Kuhlmann, Johnson-Mehl-Avrami-Kolmogorov and Austin-Rickett) were used to analyse the experimental data. The results show that although almost all observed softening can be attributed to recovery, the phenomena is well described by using mathematical models for phase transformations (JMAK and Austin Riccket). In order to promote recrystallization of overaged AA 7075, an additional thickness reduction (75%) were used. These samples were annealed isocronically during 1 hour (100 - 400°C) and it was found that recrystallization only took place at 400°C.ABM, ABC, ABPol2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300233Materials Research v.22 n.3 2019reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2018-0666info:eu-repo/semantics/openAccessSouza,Saul Hissaci dePadilha,Angelo FernandoKliauga,Andrea Madeiraeng2019-05-28T00:00:00Zoai:scielo:S1516-14392019000300233Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2019-05-28T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
title |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
spellingShingle |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 Souza,Saul Hissaci de Aluminum alloy 7075 annealing cold-rolling recovery recrystallization |
title_short |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
title_full |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
title_fullStr |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
title_full_unstemmed |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
title_sort |
Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075 |
author |
Souza,Saul Hissaci de |
author_facet |
Souza,Saul Hissaci de Padilha,Angelo Fernando Kliauga,Andrea Madeira |
author_role |
author |
author2 |
Padilha,Angelo Fernando Kliauga,Andrea Madeira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Souza,Saul Hissaci de Padilha,Angelo Fernando Kliauga,Andrea Madeira |
dc.subject.por.fl_str_mv |
Aluminum alloy 7075 annealing cold-rolling recovery recrystallization |
topic |
Aluminum alloy 7075 annealing cold-rolling recovery recrystallization |
description |
This work proposes studying the softening kinetics of aluminum alloy 7075-T6. Firstly, AA 7075 strips were overaged (300°C and 5 hours). Then, the overaged strips were cold-rolled at room temperature (45% in thickness reduction) and, after that, annealed at different temperatures (200°C and 250°C) and time intervals (30 minutes - 4 hours). By using polarized light microscopy, EBSD and Vickers hardness measurements, the softening mechanisms were determined and proper mathematical models (Kuhlmann, Johnson-Mehl-Avrami-Kolmogorov and Austin-Rickett) were used to analyse the experimental data. The results show that although almost all observed softening can be attributed to recovery, the phenomena is well described by using mathematical models for phase transformations (JMAK and Austin Riccket). In order to promote recrystallization of overaged AA 7075, an additional thickness reduction (75%) were used. These samples were annealed isocronically during 1 hour (100 - 400°C) and it was found that recrystallization only took place at 400°C. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
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=S1516-14392019000300233 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300233 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2018-0666 |
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.22 n.3 2019 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_ |
1754212674802024448 |