EFFECTS OF TEMPERATURE AND RATE AND DEGREE OF DEFORMATION ON CARBON STEEL RESISTANCE TO PLASTIC DEFORMATION

BS>Resistance of carbon steel to plastic deformation was studied at 800 to 1200 deg C and 2 to 300 sec/sup -1/ rate of deformation. The increased rate of deformation increased the carbon steel resistance to plastic deformation while an increase in temperature had a reverse effect. At high temperatures and a relatively slow deformation rate the increased carbon content in the hypoeutoctoid steel increased its resistance to plastic deformation. The increase of carbon content in the hypereutectic steel, at high temperatures and high speed of deformation, decreased its plastic deformation resistance. At 1100 to 1200 deg and at all deformation rates the hypereutectic steels have a lower plastic deformation resistance than the hypoeutectoid steels. (R.V.J.)