Delta Gamma is a 2-D simulation of the directional solidification of a ternary steel model alloy containing carbon and manganese. The simulation shows the solidification of a \delta phase dendrite and the subsequent peritectic reaction to the \gamma phase.
The simulation is performed as concentration-coupled and makes use of the 1-D far field approximation and the moving frame option. It is coupled to Thermo-Calc™.
Dendritic solidification before and after peritectic reaction
|Alloy system||Fe-C-Mn (Steel.Ges5)|
|Grid size||145x1500 cells|
|Grid spacing||1 micron|
|Interface thickness||4 cells|
|Solid phases||gamma, delta|
Concentrations at t=35s
|Carbon (C)||Manganese (Mn)|
-1: interface, 0: liquid, 1: \delta phase, 2: \gamma phase
A preset \delta ferrite grain grows dendritically in a temperature gradient (bottom cooling).
A \gamma austenite grain nucleates and the peritectic reaction/transformation proceeds.