Atomic percent vanadium 40 10 20 30 50 60 70 80 90 100 2000

Atomic percent vanadium 40 10 20 30 50 60 70 80 90 100 2000 1910°C 1800 1600 1455°C 1400 47 58.1 1280°C 73 1200 (Ni) 40 64. 1202°C51 1045 C 29.5 1000 922° 900°C 890°C 70.7 906 35.2 88.1 800 650 790°C 721 Mag. Trans 405°CII 400 200 40 60 80 90 100 50 Weight percent vanadium 0 10 20 30 70

Solution

Invariant point or eutectic point is where two liquid lines meet. Liquid lines are the lines which denote the lower limit of the liquid region. In the given figure, there is an invariant point at

1. 47% Vanadium and 1202 degree C

2. 58.1% Vanadium and 1280 degree C