Austenite-Based Fe-Mn-Al-C Lightweight Steels: Research and Prospective

Fe-Mn-Al-C lightweight steels have been investigated intensely in the last a few years. There are basically four types of steels, ferritic, ferrite-based duplex/triplex (ferrite + austenite, ferrite austenite martensite), austenite-based duplex austenite), and single-austenitic. Among these generally exhibit high strength, good ductility, outstanding weight reduction effects. Due to addition Al C content, κ’-carbide κ-carbide prone form grain interior at boundaries respectively, play critical roles controlling microstructures mechanical properties steels. The microstructural evolution, strengthening mechanisms, deformation behaviors quite different from those mild conventional TRIP/TWIP due their stacking fault energies. relationship between has widely investigated, several mechanisms also proposed for In this paper, current research works reviewed prospectives discussed.