Journal of Phase Equilibria and Diffusion

, Volume 39, Issue 5, pp 678–693 | Cite as

A Review of Calphad Modeling of Ordered Phases

  • Bo Sundman
  • Qing Chen
  • Yong Du


The models used in Calphad to describe long and short range ordering in multicomponent alloys have improved significantly over the last 20 years. For long range ordering the compound energy formalism has gained universal acceptance and it is now possible to calculate realistic phase diagrams including also short range ordering which means the Gibbs energy is modeled correctly. There is still a problem in separating enthalpy and entropy which makes extrapolations to low temperatures uncertain. In this paper some of the history will be reviewed together with the current status and some new ideas.


Calphad modeling order/disorder phase diagrams 



One of the authors (Bo Sundman) acknowledges the distinguished professor program released by the Ministry of Education of China and the State Administration of Foreign Experts Affairs of China.


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© ASM International 2018

Authors and Affiliations

  1. 1.Institut National des Sciences et Techniques NucléaresGif sur YvetteFrance
  2. 2.Thermo-Calc Software ABStockholmSweden
  3. 3.Central South UniversityChangshaChina

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