Hot deformation constitutive equation of 7059 aluminum alloy

摘要

Isothermal compression of the 7059 aluminum alloy was conducted on a Gleebe-1500D hot-simulator at the deformation temperature ranging from 330 to 450 °C and the strain rate ranging from 0.01 to 10.0 s~(-1). The influences of deformation temperature and strain rate on the stress were studied according to true stress-true strain curves, and the constitutive equation of 7059 aluminum alloy during hot deformation was established based on hyperbolic sine equations of Arrhenius type. Error analyses show that the established constitutive equation is coincident with experimental data well, and the constitutive equation provides a theory basis for determining forging technology of 7059 aluminum alloy.