On the modelling of microsegregation in steels involving thermodynamic databases

International Conference on Materials, Processing and Product Engineering 2015

You, D.^1 ; Bernhard, C.^1 ; Michelic, S.^1 ; Wieser, G.^1 ; Presoly, P.^1

Department of Ferrous Metallurgy, Montanuniversität Leoben, Franz-Josef-Straße 18, Leoben

8700, Austria^1

关键词: Dendritic concentration;    Equilibrium calculation;    Equilibrium temperatures;    Micro-segregation;    Multi-component alloy;    Partition coefficient;    Thermodynamic database;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/119/1/012027/pdf
DOI  :  10.1088/1757-899X/119/1/012027

来源: IOP

【 摘 要 】

A microsegregation model involving thermodynamic database based on Ohnaka's model is proposed. In the model, the thermodynamic database is applied for equilibrium calculation. Multicomponent alloy effects on partition coefficients and equilibrium temperatures are accounted for. Microsegregation and partition coefficients calculated using different databases exhibit significant differences. The segregated concentrations predicted using the optimized database are in good agreement with the measured inter-dendritic concentrations.