A particular coppernickel alloy contains 60wt Ni and 40wt Cu

A particular copper-nickel alloy contains 60wt% Ni and 40wt% Cu at 1300 degree C. Using Figure 1 what weight percent of this alloy is solid and what weight percent liquid? (Estimate to the best of your ability when using the Figure.) Using Figure 1 what phases are present at 1200 degree C for an alloy of 70wt% Cu and 30wt% Ni?

Solution

50% solid and 50% liquid

@ 1200 deg. alloy is fully solid