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NonCommercial-ShareAlike 4.0 International
https://creativecommons.org/licenses/by-nc-sa/4.0/
Rotation of Tie Lines
with Changing Temperature
with Changing Temperature
Choose a temperature to see how the vertical section relates to the tie lines at that temperature.
The liquidus tie line is projected. It is extended through the bulk composition for clarity.
A tie line from a temperature just below the liquidus is projected next.
A tie line from a temperature just above the solidus is projected next.
The solidus tie line is projected last. It is extended through the bulk composition for clarity.
The arrow shows the down temperature direction of the tie lines - liquidus to solidus. They rotate as temperature decreases, following Konovalov's Rule - rotating from the component with the highest melting point (A) to the one with the lowest melting point (C).
The 66% A 17% B 17% C alloy lies on a series of tie lines at different temperatures. The behaviour of these tie lines with changing temperature can be seen by projecting them all onto a composition triangle.