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Lever Rule Solidification Calculations

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Ursula Kattner
Bill Boettinger
Dilip Banerjee

Lever Rule Solidification

The calculation of the equilibrium solidification according to the lever rule is a one dimensional stepping calculation in which one of the variables, the temperature, is stepped.  At each step a single point equilibrium calculation is carried out.  The result of the calculation gives phase compositions, phase fractions and enthalpies.  Since complete diffusion is assumed for all phases, the calculation may be continued after the liquid phase has disappeared to determine changes in the solid phases.

Examples for the lever rule paths of Ni-Al-Ta and Sn-Bi-Pb alloys are shown.


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Last modified: 15 August 2017