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Journal of Materials Science

, Volume 50, Issue 2, pp 662–677 | Cite as

Solid-state phase transformation kinetics in the near-equilibrium regime

  • Yi-Hui Jiang
  • Feng LiuEmail author
  • Jin-Cheng Wang
  • Zhong-Hua Zhang
Article

Abstract

Solid-state phase transformation kinetics in the near-equilibrium regime behaves differently from that in extremely non-equilibrium regime since their thermodynamic states are different. Incorporating temperature- and transformed fraction-dependent thermodynamic terms, a thermo-kinetic model is derived to describe the transformation kinetics in the near-equilibrium regime. The model predicts a sluggish stage in isothermally conducted transformation and a temperature-dependent stage in non-isothermally conducted transformation. Then, the kinetics of γ/α transformations in two binary substitutional Fe-based alloys (i.e. Fe-3.28 at.% Mn and Fe-1.73 at.% Co), measured by isothermal and non-isothermal dilatometry, is investigated by the newly proposed model. The model quantitatively describes the retarded isothermal kinetics in Fe-3.28 at.% Mn alloy and the abnormal non-isothermal kinetics in Fe-1.73 at.% Co alloy.

Keywords

Transformation Kinetic Isothermal Transformation Continuous Nucleation Thermodynamic Term Gibbs Energy Balance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors are grateful to the financial support of the National Basic Research Program of China (973 Program, No. 2011CB610403), the Natural Science Foundation of China (Nos. 51134011 and 51431008), the Fundamental Research Fund of Northwestern Polytechnical University (No. JC20120223), the Doctorate Foundation of Northwestern Polytechnical University (No. CX201311), and the China National Funds for Distinguished Young Scientists (No. 51125002).

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Yi-Hui Jiang
    • 1
  • Feng Liu
    • 1
  • Jin-Cheng Wang
    • 1
  • Zhong-Hua Zhang
    • 2
  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anChina
  2. 2.Steel Tube DivisionBaosteel Research InstituteShanghaiChina

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