Deformation behavior and stress relaxation modeling of Cu–3Ti alloy prepared by a novel rolling process with the shortened passes

Abstract

This study explores the effects of hot rolling with a shortened process on the microstructure and properties of Cu–3Ti alloy compared to the traditional multi-pass forming, and the finite element simulation was used to predict the experimental results. At the same time, the residual stress elimination model was used to provide prediction and reference for the relaxation of residual stress during the alloy annealing process. The residual stress of hot rolled samples through the shortened passes is reduced by an average of about 6.7 % after the appropriate annealing treatment, and accompanied by an obvious increase in the yield and tensile strengths compared to that of the traditional multi-pass forming. At the same time, this hot rolled sample by 90 % reduction with 9 passes contains a 45.7 % proportion of high-angle grain boundaries due to the occurrence of extensive dynamic recrystallization, which remains a good consistence with the higher strength under this condition.

Keywords

• Cu-3Ti alloy
• Finite element simulation
• Shortened passes
• Residual stress relief model