Numerical simulation of solidification morphologies of
Cu-0.6Cr casting alloy using modified cellular automaton model
(Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan, China)
Abstract: The purpose of this study is to predict the morphologies in the solidification process for Cu-0.6Cr (mass fraction, %) alloy by vacuum continuous casting (VCC) and verify its accuracy by the observed experimental results. In numerical simulation aspect, finite difference (FD) method and modified cellular automaton (MCA) model were used to simulate the macro-temperature field, micro-concentration field, nucleation and grain growth of Cu-0.6Cr alloy using real data from actual casting operations. From the observed casting experiment, the preliminary grain morphologies are the directional columnar grains by the VCC process. The solidification morphologies by MCAFD model are in agreement with the result of actual casting experiment well.
Key words: Cu-Cr alloy; vacuum continuous casting; solidification morphology simulation; modified cellular automaton model; finite difference method