Computation of deformation-induced textures in electrodeposited nickel coating
(1.湖南省湘潭市湘潭大学教育部重点实验室低维材料及应用技术 2.湖南省湘潭市湘潭大学低维材料及应用技术教育部重点实验室3.Faculty of Materials, Optoelectronic and Physics, Xiangtan University, Xiangtan 411105, China;Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education,Xiangtan University, Xiangtan 411105, China)
Abstract: The deformation-induced textures in electrodeposited nickel coating were numerically studied. The finite element method (FEM) for polycrystalline was developed based on Taylor model. Then the deformation-induced textures in electrodeposited nickel coating with initial random and lamellar texture were simulated under tensile load. It is found that the initial textures significantly influence the deformation-induced textures. For nickel coating with the initial random textures, when the tensile strain is about 40%, there are some lamellar textures. For nickel coating with the initial lamellar textures, the lamellar texture is more intensity with the increase of the tensile strain. With the increase of the tensile strain in the coating, there are more pronounced element distortion and a more inhomogeneous deformation. Due to the different crystal orientations, the grain-scale roughness is observed. With increasing tensile strain in the coating, the surface grain-scale roughness increases on the free surface. The surface roughness of the coating with initial random texture is lower than that with the initial lamellar texture.
Key words: electrodeposited nickel coating; deformation-induced texture; Taylor model; FEM; polycrystalline