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Affiliation of Author(s):机电学院

Journal:RARE METAL MATERIALS AND ENGINEERING

Key Words:2060-T8 Al-Li alloy warm deformation strain compensation correction term constitutive model

Abstract:Isothermal tensile tests of 2060-T8 Al-Li alloy were conducted on a UTM5000 electronic universal tensile testing machine at deformation temperature of 573 similar to 648 K and strain rate of 0.001-0.1 s(-1). The true stress-strain curves of 2060-T8 Al-Li alloy were obtained and a constitutive equation considering the strain compensation as well as correction term was also established. The thermal deformation behavior of 2060-T8 Al-Li alloy was investigated by the analysis of tensile fractures using scanning electron microscopy (SEM). The results show that 2060-T8 Al-Li alloy is highly sensitive to deformation temperature and strain rate. The true stress-strain curves exhibit the characteristics of strain hardening followed by flow softening and steady flow characteristic gradually disappears with the increase of deformation temperature and the decrease of strain rate. In addition, 2060-T8 Al-Li alloy is of ductile fracture under the conditions of warm deformation. The modified constitutive model is in good great agreement with the experimental data, which can provide a precondition for the finite element analysis of 2060-T8 Al-Li alloy during warm deformation.

ISSN No.:1002-185X

Translation or Not:no

Date of Publication:2018-07-01

Co-author:Du Shunyao,xls,Chen Can

Correspondence Author:cmh