from the conferences organized by TANGER Ltd.
The effect of holding temperature on the microstructure and mechanical properties evolution of double annealed medium Mn steels with two different C level was studied. Samples were annealed at various intercritical temperatures using gradient batch annealing furnace after preliminary austenitization and quench. Mechanical properties were measured using a standard tensile test. Microstructure observations were performed and retained austenite fraction was measured using the X-ray diffraction. Curious effect of C content on the RA fraction and strength-ductility balance was observed and explained. The influence of holding temperature on the microstructure was more classical, but the resulting RA fractions and associated mechanical behavior were appealing. The questions about these relationships were addressed and certain explanations were proposed.
Keywords: medium Mn steel, double annealing, C effect, retained austenite, mechanical properties,© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.