Deformation and annealing textures of surface layers of copper sheets cold-rolled under unlubricated condition

• Published in: Metals and materials international Vol. 23; no. 1; pp. 132 - 140
• Main Authors: Choi, Hyun-Sik, Han, Heung Nam, Lee, Dong Nyung
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01.01.2017; Springer Nature B.V; 대한금속·재료학회
• Subjects: Aluminum; Annealing; Approximation; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cold; Cold rolling; Copper; Deformation; Engineering Thermodynamics; Geometry; Heat and Mass Transfer; Lubricants & lubrication; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metal sheets; Metallic Materials; Orientation; Processes; Recrystallization; Rolling direction; Room temperature; Shear deformation; Shear strain; Sheets; Solid Mechanics; Strain energy; Surface layer; Surface layers; Texture; Thickness; True strain; 재료공학; recrystallization texture; copper; surface; shear; annealing
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-017-6227-6

The texture of rolled sheets is known to vary with depth from the shear texture in the surface layer to the planestrain-compression texture in the center layer. This study has interpreted the deformation and annealing textures evolved in the surface layer of a four-layered-copper sheet cold-rolled by 93% reduction in thickness without lubrication at room temperature. The surface and center layers were separated from the cold-rolled four-layered copper sheet. The deformed surface layer was annealed for 1 h at 823 K. The deformation texture of the surface layer could be simulated by straining the {112} oriented fcc crystals by a true strain of 2.66 in the rolling direction at 0 ≤ | e 13 / e 11 | ≤ 1.4, where eij are the displacement gradients and the subscripts 1 and 3 represent the sheet rolling and sheet surface normal directions, respectively, using a visco-plastic self-consistent scheme. The annealing texture could be approximated by the simulated shear deformation orientations plus near the {001} orientation that was approximated by the recrystallization orientations calculated from the simulated deformation orientations. The recrystallization orientations were calculated by the strain-energy-release-maximization theory for the recrystallization texture evolution.