Preface of the 'Symposium on Process Metallurgy Technique Development'

摘要

A process metallurgy technique consists of the analysis technologies, such as the multi-scale finite element analysis and the experimental ones, and the synthesis technologies, such as the linear and non-linear optimization one and NOGUCHI methos, to design a new material ( sheet and bulk materials, which have features of high strength and formability. Both numerical and experimental approach is accepted to contribute "Development of a new process metallurgy technique." We demonstrated the example a high formability sheet metal generation. At first, our dynamic-explicit crystallographic homogenized elasto/viscoplastic finite element (two-scale FE) code was applied to analyze the asymmetric rolling (ASR) sheet deformation and optimized ASR process to generate a high formability sheet metal by employing NOFUCHI method and the response surface method. A texture evolution of ASR sheet metal under an optimum process condition was compared with the experimental results, and the availability of our design code was confirmed. An initial texture for the symmetrical warm rolling was optimized to generate a better formability and higher strength sheet metal. Consequently, the two-scale FE code combined with the optimization algorithm was verified as a comprehensive tool in the process metallurgy design to predict plastic induced texture evolutions and optimize a rolling process and an initial texture for a high formability sheet generation.