Asymmetric Rolling Process Simulations by Using Dynamic Explicit Crystallographic Homogenized Elasto/Viscoplastic Finite Element Method
Yasunori NAKAMURA, Nguyen Ngoc TAM, Hiroyuki KURAMAE, Hidetoshi SAKAMOTO, Hideo MORIMOTO and Eiji NAKAMACHI
Abstract:Recently, the asymmetric rolling (ASR) was applied to the material process of aluminum alloy sheet generation to control the micro-crystal structure and the texture in order to improve the mechanical properties, such as the strength and the formability. Until now, many experimental studies aimed to the high formability sheet generation have been carried out, but a numerical scheme to predict the deformation induced texture evolution of the asymmetrically rolled sheet metal have not been accomplished. In this study, the crystallographic homogenized elasto/viscoplastic finite element (FE) code is developed and applied to analyze the asymmetrical rolling process. The textures of ASR sheet metals are measured by the electron backscatter diffraction (EBSD) method, and are compared with these ASR rolling FE simulation results. This multi-scale FEM code shows a comprehensive tool to predict the plastic induced texture evolution. Key Words:Asymmetric rolling, SEM-EBSD measurement, Texture evolution, Micro polycrystal structure, Macro continuum, Multi scale, Homogenization, Finite element analysis