Transformation behavior of supercooled austenite during hot deformation of plain medium carbon steel within (γ + α) 2-phase field at a low strain rate

Abstract

The austenite-to-ferrite transformation of plain medium carbon (0.25C) steel during deformation at a slow strain rate of 0.01s occurred by dynamic massive transformation at temperature below critical temperature T C, within a 2-phase field, similarly to the case of a plain low carbon (0.15C) steel. The critical temperature T C is believed to be the deformation induced T 0, which was higher than T 0 by about 50 C, The dynamic massive transformation was largely suppressed at a strain rate of 1s .