Effect of Cold Rolling Deformation on Microstructure and Mechanical Properties of CoCrNi Medium Entropy Alloy
Medium-entropy alloys have many excellent properties,and they have high strength and ductility at the same time.Cold rolling deformation is an economical and effective method to improve mechanical properties of medium entropy alloys.The CoCrNi medium-entropy alloy was cold-rolled at room temperature with different deformations(25%,37.5%,50%,62.5%,75%).The effects of different rolling deformation on the microstructure and mechanical properties of the alloy at room temperature were studied by X-ray diffractometer,microstructure analysis and tensile test.The results show that the microstructure of CoCrNi medium entropy alloy is still a single FCC structure under different cold rolling deformation at room temperature.The room temperature tensile strength of CoCrNi medium-entropy alloy is low.With the increase of deformation,the tensile strength increases significantly,but the ductility becomes worse than that of the cast state.
medium entropy alloyscold rolling deformationmechanical propertymicrostructure
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