The influence of temperature and stress rate on the flow stress of high-manganese steels during hot deformation

The article presents the results of plastometric tests of Fe-Mn-Al-C steel with a density of 6.5 g/cm(3). The tests were carried out using the thermal processing simulator Gleeble 3800 DSI at temperature 850, 950 and 1050 degrees C and deformation rates of 0.1, 1 and 10 s(-1). It was found that as the temperature of plastic deformation increases, the value of flow stresses and the value of plastic deformation needed to initiate the transfer of material into a plastic state are reduced. The highest flow stress values were obtained at 850 degrees C and strain rate 10 s(-1). Niobium and titanium micro additive influences the increase in the value of flow stress. The main mechanism of plastic deformation of the investigated steels is dynamic recovery.