The ESTPHAD Concept: An Optimised Set of Simplified Equations to Estimate the Equilibrium Liquidus and Solidus Temperatures, Partition Ratios and Liquidus Slopes for Quick Access to Equilibrium Data in Solidification Software Part III: Ternary Eutectic-Type Equilibrium Phase Diagram
Abstract
The liquidus and solidus temperatures, the initial temperature of the solidification of binary eutectics, and the partition ratios of the solid solution at the Al corner of the ternary eutectic-type Al-Si-Cu alloy system were calculated using the thermodynamically based ESTPHAD method. It is shown that these data can be calculated from the liquidus and solidus data of the two binary equilibrium phase diagrams (first estimation), the binary phase diagram and the eutectic valleys in the ternary system (second estimation), as well as the binary phase diagram, the eutectic valleys, and one (third estimation) and more (fourth estimation) liquidus and solidus temperatures of the ternary equilibrium phase diagram with varying precisions. A database calculated with Thermo-Calc software (version 4.1.0.4995), was used for the calculations.
Fields of Study & Subjects
Solidification and crystal growth phenomena
Aluminum Alloy Microstructure Properties
Metallurgical Processes and Thermodynamics
Publication details
- Journal / source
- Metals
- Publisher
- MDPI AG
- Volume
- 16
- Issue
- 1
- Pages
- 80–80
- Publication date
- 11 January 2026
- Language
- EN