Ductility and strengthening behaviour of iron manganese steels with Mn mass contents of 15 to 30 percent. Austenite stability and stacking fault energy. Impact on the microstructure to be developed under certain stress state or during severe plastic deformation. Medium Mn mass contents and martensitic gamma-epsilon-alpha ft phase transformation. Dislocation glide. Mn mass content, elongation and twinning formation. Influence of alloying elements Al and Si on mechanical properties of iron-manganese alloys. Dynamic tensile and compression tests with varying temperature and strain rate. Microstructure under near crash conditions. Deformation induced twinning. Determination of deep drawing and stretch forming behaviour.
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