Microstructure and texture evolution of Cu-Cr-Co-Ti alloys during the two-stage cryorolling  

作　　者：Jia-Jun Zhang Long-Jian Li Zhi-Feng Liu Zong-Ning Chen En-Yu Guo Hui-Jun Kang Ren-Geng Li Tong-Min Wang 

机构地区：[1]Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China [2]Center of Hyper-Gravity Experimental and Interdisciplinary Research,Zhejiang University,Hangzhou 310058,China [3]Ningbo Institute of Dalian University of Technology,Ningbo 315000,China [4]Key Laboratory for Light-Weight Materials,Nanjing Tech University,Nanjing 210009,China

出　　处：《Rare Metals》2024年第9期4535-4547,共13页稀有金属（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52271025,51927801 and U22A20174);the Science and Technology Planning Project of Liaoning Province(No.2023JH2/101700295);the Innovation Foundation of Science and the Technology of Dalian(No.2023JJ12GX021);the Natural Science Foundation of Jiangsu Province(No.BK20200695)。

摘　　要：This study entailed an investigation of the mechanical properties,microstructural and texture orientation evolutions of Cu-Cr-Co-Ti alloys prepared via twostage 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 Brasstype 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.

关 键 词：Copper alloys Two-stage cryorolling Macrotexture evolution Electron backscatter diffraction Schmid factor 

分 类 号：TG335.12[金属学及工艺—金属压力加工] TG146.11[一般工业技术—材料科学与工程]