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| AlN precipitation during steel solidification using CA model |
| Lei Cui1,2, Yi-han Shi1,2, Xiang-ning Meng1,2 |
| 1 Key Laboratory for Ecological Metallurgy of Multi-Metallic Ores, Northeastern University, Shenyang 110819, Liaoning, China 2 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China |
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Abstract Based on the principles of metal solidification and cellular automaton (CA), as well as AlN precipitation thermodynamics and kinetics, a CA model of interdendritic AlN precipitation was established by coupling a large-size mesh describing the dendrite growth of Fe–C–Al–N alloys and a small-size mesh representing AlN precipitation based on transient chemical equilibrium. The results of single dendrite growth stimulated by this model were compared with the Lipton–Glicksman– Kurz solution to verify the correctness of the matrix dendrite growth simulation. The AlN morphology and dimensions obtained from the CA model simulations are following the experimental results. The presence of equiaxed dendrite in the computational domain results in a significant coarsening of the columnar dendrite and a uniform solute distribution around them, and the AlN solid phase fraction decreases. Simulations of AlN precipitation at different wetting angles were also performed, and it was found that the solid phase fraction of AlN decreased with the increase in wetting angle. Thus, it is confirmed that the established model is an effective method to simulate interdendritic AlN precipitation.
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| Cite this article: |
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Lei Cui,Yi-han Shi,Xiang-ning Meng. AlN precipitation during steel solidification using CA model[J]. Journal of Iron and Steel Research International, 2022, 29(11): 1789-1799.
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2022, Vol. 29 
