Transactions of Materials and Heat Treatment

Title：Flow stress constitutive equation of 01570 aluminum alloy during hot compression

Authors： ZHANG Xiao-gang PAN Qing-lin LIANG Wen-jie HE Yun-bin LIU Jun-sheng GUO Yun-shu(School of Material Science and Engineering Central South University Changsha 410083 China)

Unit：

KeyWords： 01570 aluminum alloy hot compression flow stress constitutive equation

ClassificationCode：TG146.22

year,vol(issue):pagenumber：2009,34(1):139-142

Abstract：

The flow stress behavior of 01570 aluminum alloy during hot compression deformation conditions was studied by isothermal hot compression on Gleeble-1500 hot simulation machine.The deformation temperature range was 300~450 ℃ and the strain rate range was 0.001~1 s-1.The experimental results indicate that the flow stress of 01570 aluminum alloy increases with increasing strain and tends to be constant after a peak value at temperature 300 ℃ and strain rates of 0.01~1 s-1,showing dynamic recover.The flow stress falls down after a peak value with the increasing strain at the other conditions,showing dynamic recrystallization.The deformation activation energy of 01570 aluminum alloy during hot deformation is 152.33 kJ·mol-1 from Arrhenius equation.

Funds：

国家863计划项目(2006AA03Z523)

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