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Cellular automaton modeling of peritectic transformation⋆.

Yiming Fan1, Hui Fang1, Qianyu Tang1

  • 1Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, 211189, Nanjing, China.

The European Physical Journal. E, Soft Matter
|March 7, 2020
PubMed
Summary
This summary is machine-generated.

A cellular automaton model predicts iron-carbon alloy peritectic transformation. Simulations accurately match experimental data for phase growth and microstructure evolution, revealing key influencing factors.

Keywords:
Topical issue: Branching Dynamics at the Mesoscopic Scale

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Area of Science:

  • Materials Science
  • Computational Materials Science
  • Metallurgy

Background:

  • Peritectic transformation is crucial in Fe-C alloys.
  • Understanding its kinetics and microstructural evolution is vital for material properties.
  • Existing models may lack quantitative predictive power.

Purpose of the Study:

  • To develop and validate a two-dimensional multiphase cellular automaton (CA) model for peritectic transformation in Fe-C alloys.
  • To predict growth kinetics and microstructural evolution.
  • To analyze the influence of temperature and phase thickness on growth behavior.

Main Methods:

  • Development of a 2D multiphase cellular automaton model.
  • Simulation of peritectic transformation in Fe-C alloys.
  • Validation against experimental measurements and analytical predictions.
  • Analysis of simulation results to determine influencing factors.

Main Results:

  • The CA model accurately predicts the growth kinetics of the γ-phase and concentration distributions.
  • Simulated time evolution of γ-phase thickness and concentration profiles agree well with experimental data.
  • γ-phase growth velocity decreases with increasing γ-phase thickness and holding temperature.
  • Driving force for γ-phase growth increases with decreasing temperature.

Conclusions:

  • The proposed CA model offers quantitative prediction capabilities for peritectic transformation.
  • Holding temperature and γ-phase thickness significantly influence γ-phase growth.
  • Temperature plays a critical role in the driving force for phase growth during isothermal transformation.