Phase-field simulation on the peritectic phase transition in Fe-C binary alloy

Journal of Lanzhou University of Technology ›› 2020, Vol. 46 ›› Issue (3): 13-17.

• Materials Science and Engineering • Previous Articles Next Articles

Phase-field simulation on the peritectic phase transition in Fe-C binary alloy

FENG Li^1,2, ZHONG Jun-he¹, WANG Jun¹, AN Guo-sheng¹, WANG Huai-zhi³, GAO Ya-long⁴

1. College of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;
3. College of Materials Science and Engineering, Qingdao Univ., Qingdao 266100, China;
4. Zhejiang Jiuli Hi-Tech Metals Co., Ltd., Huzhou 313000

Received:2019-04-22 Online:2020-06-28 Published:2020-08-19

Abstract

Abstract: In this study, taking Fe-0.79 mol%C binary alloy as an example, the evolution of austenite in different supercooling degree during peritectic phase transition is simulated by multiphase field method, and the influences of supercooling degree on austenite growth rate as well as austenite morphology are discussed respectively. The simulation results show that in the process of peritectic reaction and influenced by interfacial mobility and solute enrichment, part of δ phase near the three-phase junction remelted, resulting in the growth of γ phase into δ phase. When the peritectic phase transition occurs on the surface of the spherical δ phase in liquid phase, the γ phase grows around the δ phase as a shell, and finally forms a core shell around the δ phase. With the increase of undercooling, the driving force of peritectic transformation increases, the growth rate of γ phase accelerates, and the amount of δ phase surrounded by γ phase increases.

Key words: multiphase field method, Fe-C binary alloy, peritectic transformation, austenite, undercooling

CLC Number:

TG244
TG248

FENG Li, ZHONG Jun-he, WANG Jun, AN Guo-sheng, WANG Huai-zhi, GAO Ya-long. Phase-field simulation on the peritectic phase transition in Fe-C binary alloy[J]. Journal of Lanzhou University of Technology, 2020, 46(3): 13-17.

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Phase-field simulation on the peritectic phase transition in Fe-C binary alloy

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