AUSTENITE-TO-FERRITE TRANSFORMATION OF PLAIN LOW CARBON STEEL DURING DEFORMATION WITHIN A (γ + α) TWO-PHASE FIELD

摘要

Dynamic transformation of plain low carbon steel occurred by massive transformation at temperature below T_0 within 2-phase field at strain rates slower than about 0.1s~(-1). The critical strain for dynamic transformation was characteristically low as compared to that for strain induced transformation, which occurred at above T_0 within 2-phase field. The transformation rate by dynamic massive transformation was controlled by imposed strain rate. Grain refinement of massive ferrite occurred through continuous dynamic recrystallization of massive ferrites.