Framework for through-process simulation of rolling, microstructure evolution and forming properties for aluminum sheet productionThursday (09.11.2017) 14:20 - 14:40 Part of:
During the conventional production of aluminum sheets from cast ingots, the workpiece passes through a sequence of rolling and annealing steps. In the course of production, the process influences the microstructure, i.e. via deformation and heat input the texture, grain size and other microstructural characteristics develop. The final microstructural state in the semi-finished product then defines the in-service properties like strength or forming behavior. If the production route is mapped computationally via integrated process- and microstructure-simulation tools, there is a high potential for optimizing microstructural and final properties and the process itself. Furthermore, the utilization of such a simulation setup gives the possibility to gain understanding of complex interactions within the system, which are very expensive or not even possible to be tracked experimentally. Within this work a fully automated simulation framework of a thermally coupled roll-gap model with integrated microstructure evolution models is presented. Focus is put upon the tracking of microstructural properties throughout the rolling process, the calibration of the framework, and its validation compared to experimental findings for two different processing routes from two different aluminum alloys. Finally, the resulting microstructural state from simulations and experiments are virtually tested and compared via a forming simulation tool to predict earing and R-value properties.