Microstructural and mechanical characterization of C-Mn-Al-Si cold-rolled TRIP-aided steel

These studies revealed that the microstructure of the steel mainly consisted of bainitic ferrite lath matrix, blocky martensites and stable retained austenite films of 7-8 vol%. When austempered at temperatures above MS temperature, the steel possessed high tensile strength of 600 MPa, total elongation of 28-32% and n-value 0.2. The present paper deals with the effect of heat treatment on microstructure and mechanical properties of C-Mn-Al-Si cold-rolled TRIP steel.