Microstructure and texture evolution of Cu–Cr–Co–Ti alloys during the two‐stage cryorolling
Jiajun Zhang, Longjian Li, Zhifeng Liu, Zongning Chen, Enyu Guo, Huijun Kang, Rengeng Li, Tongmin Wang
Abstract
Abstract This study entailed an investigation of the mechanical properties, microstructural and texture orientation evolutions of Cu–Cr–Co–Ti alloys prepared via two‐stage cryorolling and intermediate aging treatment. To this end, X‐ray diffraction and electron backscatter diffraction were employed. The results indicate that the two‐stage cryorolling and intermediate aging treatments led to the development of profuse twin bundles and significantly enhanced the mechanical properties. The initial cryorolling led to coplanar slip and developed a strong Y ({111} <112>) orientation, accelerating the formation of Goss ({011} <100>) orientation and a Brass‐type texture. The intermediate aging treatment relieved the restriction on dislocation slip and reoriented the grains toward the Copper ({112} <111>) and Z ({111} <110>) orientations. The Z orientation, with a relatively high volume fraction, dominated the macrotexture. Secondary cryorolling intensified twinning and shear banding, transforming the Copper‐type shear bands into Brass‐type shear bands with rhomboidal prism morphology. The areas inside the Brass‐type shear bands exhibited a Y orientation, and the areas outside the shear bands exhibited a stable Brass‐type texture. The evident decrease in the weighted Schmid factors demonstrated that the two‐stage cryorolling and intermediate aging treatment can modify the texture evolution and aid the design of high‐performance Cu alloys.