The rolling conditions, microstructure and basic mechanical properties of four different high-manganese steels were studied following laboratory melting, casting and hot- and cold-rolling. The stacking-fault energy of heats ranged from of 85 to 114mJ/m2 due to the high aluminium contents. Heats having the lowest sum of (C+Mn) had the highest ferrite volume fraction (up to 45%), while the highest sum of (C+Mn) led to 10% ferrite formation. With lower Al/(C+Mn) ratios and lower ferrite fraction, higher rolling forces were necessary. Due to heterogeneities of the matrices and observed aluminium oxide complexes, differences in mechanical properties were detected. The best results showed were found for a heat with 0.65C-29.5Mn-9.0%Al and a stacking-fault energy of 114mJ/m2.

Structural and Mechanical Properties of Laboratory Rolled Steels High-Alloyed with Manganese and Aluminium. D.Kuc, E.Hadasik, G.Niewielski, I.Schindler, E.Mazancová, S.Rusz, P.Kawulok: Archives of Civil and Mechanical Engineering, 2012, 12[3], 312-7