CuZn40Pb2 brass hot deformation behaviour modelling using Hansel Spittel constitutive model

Abstract

ABSTRACT Due to its popularity in the industry, brass is an important material to model as it can lead to time and cost savings. The hot deformation behaviour of CuZn40Pb2 brass was performed using Hansel Spittel constitutive model. Hot compression tests were carried out at temperatures ranging from 550°C to 750°C with strain rates of 0.1/s, 1/s and 10/s using a thermomechanical simulator Gleeble. The results show that the temperature and the strain rate have a significant impact on the flow stress. The impact of friction between the specimen and anvils, as well as the effect of increasing temperature during the hot compression tests, were considered. A detailed approach was used to correct the flow curves accordingly. The constitutive model was determined based on the corrected flow curves that would be used in the forging process simulations, through FORGE. This finite element software is based on the constitutive Hansel Spittel model. A comparative study between the experimental and numerical results showed that the numerical flow curves of CuZn40Pb2, computed from the constitutive model, are in good agreement with the experimental data. It proved that the Hansel Spittel is an appropriate constitutive model to describe the hot deformation behaviour of CuZn40Pb2 brass.