Influence of deformation path change on static strain aging of cold rolled steel strip

Abstract

Effect of deformation path change on the static strain aging of low carbon steel was studied in this work. In the first stage, strip samples were subjected to cold rolling processes under different paths with the same total reduction in thickness while the deformation behaviors of the rolled samples were also evaluated using a mathematical analysis. Then, cold-rolled strips were aged in room temperature up to 45 days while hardness and tensile evaluations were performed to assess the mechanical properties of the as-rolled and the aged samples. Finally, the influence of rolling pass schedule on the subsequent strain aging phenomenon was investigated by means of the experimental results and the predictions. The results indicate that rolling path schedule significantly changes plastic strain and residual stress distributions. Furthermore, the kinetics of aging phenomenon also varies after different rolling paths where a schedule containing two-pass reverse layout may result in the fastest aging kinetics.