Multiphase Field Modeling of Dendritic Solidification of Low-Carbon Steel with Peritectic Phase Transition

In the present study, an improved multiphase field model with taking into consideration S/L interface anisotropy is proposed to simulate dendritic growth peritectic transition of low-carbon steel, and a new random heterogeneous nucleation method treat γ phase during solidification process. The around dendrite (the single polycrystalline ferrite) subsequent transformation are simulated. results show that when temperature reaches temperature, nuclei suddenly nucleate at δ/L interface, laterally grow movement L/γ/δ triple point δ dendrite. After fully wrapped by continuous intervening phase, continues direct from both liquid phase. With increase melt undercooling, more consumed form between becomes thick, but arm thin. During process, solute would be rejected trunk enriched boundary, especially root. enrichment root inhibit thus thickness thinnest Moreover, concentration in among because carbon solubility higher than lower