The Bauschinger effect and mechanical properties of AA5754 aluminum alloy in incremental forming process

Abstract

This study aims to explore the Bauschinger effect and mechanical properties of 5754 aluminum alloy and their relationship through parts manufactured by incremental forming technology. Pyramidal parts with five different wall angles were formed using incremental forming after which tensile samples from each of the parts were prepared and tested. The experimental results indicated that the Bauschinger effect existed during incremental forming of the aluminum alloy. It was also found that the level of the Bauschinger effect, yield strength, and ultimate tensile strength increased with the expanding wall angle. Compared with the influence of the Bauschinger effect, the work hardening plays a leading role in the change of mechanical properties. Based on the study results, the formulas for predicting the mechanical properties at different wall angles are obtained. Understanding the Bauschinger effect and mechanical properties can help to guide incremental forming simulation and process development of parts manufactured by incremental forming.