Microstructure evaluation of an advanced high strength steel with superior results in terms of strength-ductility trade-off

Major improvements in new advanced high strength steels, especially related to microstructural features, have been made by the steel sector access trade-off between and ductility. In this context, present study provides a detailed analysis of microstructure cold rolled with minimum tensile 980 MPa, which possesses superior elongation when compared other conceptions steels from same level. The annealing process was simulated Gleeble machine, characterization done using optical scanning electron microscopy, EBSD XRD analysis. Austenite decomposition, dilatometric test, mechanical properties were also evaluated. revealed consisting ferrite matrix martensite islands retained austenite particles, fraction equivalent that conventional TRIP dispersed throughout. carbon content austenite, however, less than 1.0% w/w, results relatively low stability. Therefore, increase strain hardening capacity enabled deformation-induced transformation produces increased ductility during straining, distinguishing analyzed material