The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy

Detalhes bibliográficos
Autor(a) principal: Quan,Guo-zheng
Data de Publicação: 2013
Outros Autores: Shi,Yu, Yu,Chun-tang, Zhou,Jie
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=S1516-14392013000400013
Resumo: In order to study the hot working behaviour of as-cast AZ80 magnesium alloy, a series of isothermal upsetting tests with height reduction of 60% were performed at the temperature range of 523-673 K and the strain rate range of 0.01-10 s-1 on a servo-hydraulic Gleeble-1500 machine simulator. Based on the regression analysis for Arrhenius type equation of flow stress, the activation energy of deformation was determined to be Q = 168.6606 KJ·mol-1, and material constants , n and α in the equation also were calculated respectively to predict the peak stress during hot deformation. A 7th order polynomial was used to represent the influence of strain on these parameters (i.e Q, ln, n and α). The Arrhenius equation was further developed by taking account of the effect of strain on the flow stress to describe the flow behavior during the whole experimental temperature and strain rate range. Then comparison between the predicted results and test results shows that the correlation coefficient and average absolute relative error is 0.99 and 6.63%, respectively. The flow stress predicted by developed equation can give an accurate and precise description of the flow behaviour for AZ80 magnesium alloy.
id ABMABCABPOL-1_a658121a6ea4e119401a8bc56643f522
oai_identifier_str oai:scielo:S1516-14392013000400013
network_acronym_str ABMABCABPOL-1
network_name_str Materials research (São Carlos. Online)
repository_id_str
spelling The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloymagnesium alloyflow stressactivation energyconstitutive equationIn order to study the hot working behaviour of as-cast AZ80 magnesium alloy, a series of isothermal upsetting tests with height reduction of 60% were performed at the temperature range of 523-673 K and the strain rate range of 0.01-10 s-1 on a servo-hydraulic Gleeble-1500 machine simulator. Based on the regression analysis for Arrhenius type equation of flow stress, the activation energy of deformation was determined to be Q = 168.6606 KJ·mol-1, and material constants , n and α in the equation also were calculated respectively to predict the peak stress during hot deformation. A 7th order polynomial was used to represent the influence of strain on these parameters (i.e Q, ln, n and α). The Arrhenius equation was further developed by taking account of the effect of strain on the flow stress to describe the flow behavior during the whole experimental temperature and strain rate range. Then comparison between the predicted results and test results shows that the correlation coefficient and average absolute relative error is 0.99 and 6.63%, respectively. The flow stress predicted by developed equation can give an accurate and precise description of the flow behaviour for AZ80 magnesium alloy.ABM, ABC, ABPol2013-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400013Materials Research v.16 n.4 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000070info:eu-repo/semantics/openAccessQuan,Guo-zhengShi,YuYu,Chun-tangZhou,Jieeng2013-08-02T00:00:00Zoai:scielo:S1516-14392013000400013Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-08-02T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
title The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
spellingShingle The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
Quan,Guo-zheng
magnesium alloy
flow stress
activation energy
constitutive equation
title_short The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
title_full The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
title_fullStr The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
title_full_unstemmed The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
title_sort The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy
author Quan,Guo-zheng
author_facet Quan,Guo-zheng
Shi,Yu
Yu,Chun-tang
Zhou,Jie
author_role author
author2 Shi,Yu
Yu,Chun-tang
Zhou,Jie
author2_role author
author
author
dc.contributor.author.fl_str_mv Quan,Guo-zheng
Shi,Yu
Yu,Chun-tang
Zhou,Jie
dc.subject.por.fl_str_mv magnesium alloy
flow stress
activation energy
constitutive equation
topic magnesium alloy
flow stress
activation energy
constitutive equation
description In order to study the hot working behaviour of as-cast AZ80 magnesium alloy, a series of isothermal upsetting tests with height reduction of 60% were performed at the temperature range of 523-673 K and the strain rate range of 0.01-10 s-1 on a servo-hydraulic Gleeble-1500 machine simulator. Based on the regression analysis for Arrhenius type equation of flow stress, the activation energy of deformation was determined to be Q = 168.6606 KJ·mol-1, and material constants , n and α in the equation also were calculated respectively to predict the peak stress during hot deformation. A 7th order polynomial was used to represent the influence of strain on these parameters (i.e Q, ln, n and α). The Arrhenius equation was further developed by taking account of the effect of strain on the flow stress to describe the flow behavior during the whole experimental temperature and strain rate range. Then comparison between the predicted results and test results shows that the correlation coefficient and average absolute relative error is 0.99 and 6.63%, respectively. The flow stress predicted by developed equation can give an accurate and precise description of the flow behaviour for AZ80 magnesium alloy.
publishDate 2013
dc.date.none.fl_str_mv 2013-08-01
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=S1516-14392013000400013
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400013
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000070
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.16 n.4 2013
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_ 1754212662910124032

Registros relacionados