TY - JOUR
T1 - Fe-C peritectic solidification of polycrystalline ferrite by phase-field method
AU - Yang, Chao
AU - Wang, Xitao
AU - Jafri, Hasnain Mehdi
AU - Wang, Junsheng
AU - Huang, Houbing
N1 - Publisher Copyright:
© 2020
PY - 2020/6/1
Y1 - 2020/6/1
N2 - A multi-phase-field model was applied to simulate the polycrystalline solidification of δ phase (δ-ferrite) and peritectic solidification of γ phase (γ-austenite) in Fe-C system. Four main modes of phase transformation are included in this simulation, which are solidification of δ phase L → δ, solidification of γ phase L → γ, peritectic transformation δ → γ and peritectic reaction L + δ → γ. The results reveal that the redistribution and diffusion of carbon not only controls the movement of δ-liquid, γ-liquid and γ-δ interfaces but also lead to the production of liquid channels and melting pools. In addition, the evolution of the volume fractions of each phase was analyzed, which shows the statistical law of the interaction of δ, γ and liquid phases at different stages. The present study therefore contributes to the understanding of polycrystalline simulation of Fe-C peritectic solidification and clarifies the formation mechanism of microstructure and micro-segregation.
AB - A multi-phase-field model was applied to simulate the polycrystalline solidification of δ phase (δ-ferrite) and peritectic solidification of γ phase (γ-austenite) in Fe-C system. Four main modes of phase transformation are included in this simulation, which are solidification of δ phase L → δ, solidification of γ phase L → γ, peritectic transformation δ → γ and peritectic reaction L + δ → γ. The results reveal that the redistribution and diffusion of carbon not only controls the movement of δ-liquid, γ-liquid and γ-δ interfaces but also lead to the production of liquid channels and melting pools. In addition, the evolution of the volume fractions of each phase was analyzed, which shows the statistical law of the interaction of δ, γ and liquid phases at different stages. The present study therefore contributes to the understanding of polycrystalline simulation of Fe-C peritectic solidification and clarifies the formation mechanism of microstructure and micro-segregation.
KW - Fe-C alloy
KW - Multi-phase-field model
KW - Peritectic transformation
KW - Polycrystalline solidification
UR - http://www.scopus.com/inward/record.url?scp=85080119992&partnerID=8YFLogxK
U2 - 10.1016/j.commatsci.2020.109626
DO - 10.1016/j.commatsci.2020.109626
M3 - Article
AN - SCOPUS:85080119992
SN - 0927-0256
VL - 178
JO - Computational Materials Science
JF - Computational Materials Science
M1 - 109626
ER -