Effect of low temperature rolling on mechanical properties and corrosion resistance of CrCoNi medium entropy alloy

Abstract For the casted CrCoNi medium entropy alloy melted by magnetic levitation, deformation was carried out in 4 passes under condition of liquid nitrogen temperature (−196 °C), total reduction 50%, The microstructure and properties were analyzed after low rolled. experimental data showed that phase structure not changed low-temperature rolling. grains, crushed refined, elongated along rolling direction. With increasing reduction, tensile strength increased from 585 MPa to 1359 MPa, while elongation decreased 37.8% 5.9%. work hardening, gradually increased, plasticity dramatic decreased. At same time, corrosion resistance improved cold as-cast rolled much better than 304 stainless steel.