Combined effect of the prior deformation and applied stress on the bainite transformation

Abstract

There has been a continued interest over the past years in the effects of external stress or prior deformation on the bainite transformation. In this study, the combined effect of prior deformation and stress on the bainite transformation was investigated and the interaction between the effects of prior deformation and stress was discussed in detail. The results show that although single deformation and single stress promote the bainite transformation, their combination cannot promote the bainite transformation to a much larger degree. In addition, at the early stage of transformation, the promotion effects of prior deformation and stress on the amount of the bainite transformation are enhanced by each other. However, at the latter stage, the deformation weakens the promotion effect of the stress. Moreover, prior deformation at a low temperature accelerates the kinetics of the bainite transformation with stress, but it decreases the amount of the bainite transformation even if the deformation is small.