25/10/2022: How to read a phase diagram I

Metallic systems

Phase diagrams are graphical representations of materials, most commonly as a function of temperature and composition. In this “how to read a phase diagram” course the main focus is on the practical aspects of reading. It gives an insight into the type of information you can retrieve from a phase diagram and how to give an interpretation to the different lines and areas in the graph. The course starts with a basic level introduction but rapidly advances to more complex systems. Exercises are foreseen to ensure a thorough understanding. Exercises in this first part focus mainly metallic material systems (alloy melting points, solidification, heat treatment, precipitation, etc.), with special attention to iron and steel. A next session focuses on specific diagrams for oxides and sulphides (slag and matte).


  • 09.00: Registration
  • 09.30: Binary diagrams
    • Different areas and lines in a binary phase diagram
    • Lever rule to determine phase fractions and phase composition
    • Eutectic, peritectic, eutectoid, peritectoid reactions
    • Microstructure formation upon equilibrium cooling
  • 11.30: Ternary diagrams
    • Interpretation of a liquidus projection
    • Isothermal sections
    • Lever rule to determine phase fractions and phase compositions
  • 12.30: Sandwich lunch
  • 13.30: Ternary diagrams continued
    • Equilibrium between liquid and solid
    • Ternary reactions
  • 14.00: More examples for metallic systems
    • Microstructure formation in non-equilibrium cooling conditions 
    • Fe-C: white cast iron zone and Fe–Fe3C: grey cast iron zone and carbon steel zone
    • FCC and BCC structure and alloying influence
    • Solidification path in equilibrium
    • Miscibility gap
  • 15.45: Opportunity for discussion


After the course all participants know how to interpret a phase diagram and are able to use it in industrial applications.


The course will tackle the theory of the topics listed above and several exercises will be made to ensure that everything was understood. It is advisable to bring a pencil, ruler, and calculator.

Who should attend

The course will be given in English and aims at people active in the metal processing industry. The course can be a refreshment of the metallurgical principles for engineers, or give hands-on metallurgists a solid theoretical background.


450€ per person per day (excl. VAT)
1600 € per person for the full course program (4 days) (excl. VAT)

WhenTuesday 25 October 2021
Registration deadlineMonday 17 October 2021 (cancellation is possible before this date)
Participantsmin. 6 – max. 12
InsPyro, I&I Leuven, Kapeldreef 60, 3001 Leuven, Belgium
RegistrationBy email: Els.Nagels@inspyro.be
By phone: +32/16.298.492 (Els Nagels)
or through the form on this page


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