Rheological behavior and constitutive equations of 7075 aluminum alloy sheet at elevated temperatures

Abstract

In order to investigate the rheological behavior of 7075 aluminum alloy sheet at elevated temperatures and used in numerical simulation, hot tensile tests by Gleeble 3500 were conducted.at temperatures of 350°C / 400 °C / 450°C and strain velocity of 0.01 s-1/0.1 s-1/1 s-1. In this paper, the rheological behavior of 7075 aluminium alloy sheet at high temperature is studied, and two constitutive equations are used to describe the rheological behavior of the material. The results show that the deformation temperature has a significant effect on flow stress. During the whole process of tensile deformation, both work hardening and dynamic recovery affect the flow stress. The Cobb-Simonds constitutive equation has good predictive ability.