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Updated: Oct 6, 2025
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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Simulation of the Peritectic Phase Transition in Fe-C Alloys
Hui Fang1, Qianyu Tang1, Qingyu Zhang2
1Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
Materials (Basel, Switzerland)
|January 21, 2022
Summary
This study uses a cellular automaton model to simulate peritectic phase transitions in iron-carbon alloys. The model reveals how cooling rates and supersaturation affect microstructural evolution and phase growth dynamics.
Area of Science:
- Materials Science
- Computational Materials Science
Background:
- Peritectic phase transitions are crucial in alloy solidification.
- Understanding the kinetics and microstructural evolution of peritectic transformations is essential for controlling material properties.
Purpose of the Study:
- To extend a multi-phase cellular automaton (CA) model for quantitative simulation of peritectic phase transitions.
- To investigate the effects of cooling rate, supersaturation, and temperature on peritectic transformation kinetics in Fe-C alloys.
- To simulate and analyze microstructural evolution during peritectic reactions.
Main Methods:
- Development and application of a multi-phase cellular automaton (CA) model.
- Quantitative simulation of peritectic phase transition kinetics.
- Investigation of the influence of supersaturation and cooling rates on interface growth velocities.
- Comparison of simulation results with experimental data and analytical calculations.
Main Results:
- Supersaturation significantly increases the liquid/gamma interface growth velocity but has a minor effect on the delta/gamma interface migration.
- A transition supersaturation exists for isothermal transformations, which increases with decreasing temperature.
- At high cooling rates, the gamma-phase exhibits cellular growth into the liquid phase.
- The CA model accurately reproduces the observed microstructural evolution, including the encirclement of delta-phase by gamma-phase.
Conclusions:
- The extended CA model provides a robust tool for simulating peritectic transformations.
- Cooling rate and supersaturation are critical parameters influencing peritectic microstructural development.
- The simulation results align well with experimental observations and theoretical predictions, validating the model's efficacy.
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