Modeling the hot deformation behavior of Al alloy 3003

Abstract

The hot deformation behavior of Al alloy 3003 under a wide range of temperatures and strain rates is modeled by a modified Voce type model. The isothermal hot compression tests, in a wide range of temperatures ranging from 300°C to 500°C and strain rates ranging from 0.01s−1 to 1s−1 were conducted. The results of true stress–strain curves reveal that the flow stress decreases with the increase of the temperature or decrease of the strain rate. The curves present peak stresses at a particular strain, and are followed by the flow softening. A modified Voce type model was employed to describe the flow stress characterization in a wide range of strain, including three parameters, namely the peak flow stress, the rising coefficient, and the dropping coefficient. The Arrhenius-type equation was investigated to characterize the effects of strain rate and temperature on the peak flow stress. The effects of strain rate and temperature on the rising coefficient and the dropping coefficient were analyzed empirically by multiple linear functions. The constitutive equations were verified by comparing the experimental results and predicted results, and good agreement was achieved.