Calculate the degree of freedom for eutectic reaction for an iron-carbon alloy and an iron-chromium-nickel alloy, under 1 atmosphere.

Degree of freedom for eutectic reaction  in iron-carbon alloy under 1 atmosphere. According to phase rule or Gibbs rule. Eutectic reaction for an iron-carbon alloy have binary phase diagram.

F = C-P+2

F = Degree of freedom

C = Number of components

P = The number of phases

Here, in the case

C = 2, P = 2

so, F = 2-2+2=2

The degree of freedom for eutectic reaction for an iron-carbon alloy is 2

For iron-chromium-nickel alloy, the degree of freedom.

Here, in this case three component system give rise to ternary diagrams.

F = C-P+1

C = 3, P = 2

So, F = 3-3+1 = 1.

The degree of freedom for eutectic reaction for an iron-chromium nickel alloy is 1.