Effects of Room Temperature and Low Temperature Rolling Deformation on Microstructure, Properties and Texture of CrCoNi Medium Entropy Alloy

Homogenized CrCoNi medium entropy alloy was rolled at room temperature and low temperature (77 K) for three passes, respectively, with the total deformation of 50%. The effect of room temperature and low temperature rolling on the microstructure and texture of the alloy was studied. The experimental results show that HCP transformation occurs in a small amount of FCC in the alloy, and the transformation is more obvious at low temperature, and the surface convex phenomenon is observed. A small amount of Σ3 annealing twins remains in the microstructure after room temperature rolling, while a small amount of Σ3 annealing twins remains in the microstructure after low temperature rolling. There is obvious tensile anisotropy in RD and TD directions. The (111)＜110＞(E) texture is formed in the //RD direction of the specimens at room temperature. Low temperature sample forms (110)＜111＞(texture A), (110)＜001＞(Goss texture) in //RD direction, the highest tensile strength direction is //TD.