A copper–nickel alloy of composition 40 wt % Ni – 60 wt % Cu is slowly heated from a temperature of 1100 °C. Show your calculation details in your answer and draw lines on the phase diagram to label the phases and compositions. a) At what temperature does the first liquid phase form?

A copper–nickel alloy of composition 40 wt % Ni – 60 wt % Cu is slowly heated from a temperature of 1100 °C.
Show your calculation details in your answer and draw lines on the phase diagram to label the phases and compositions.
a) At what temperature does the first liquid phase form?
b) What is the composition of this liquid phase (first liquid phase form)?
c) At what temperature does complete melting of the alloy occur?
d) What is the composition of the last solid remaining prior to complete melting?
Question 2: (12 points: 4 pts each)
For a copper–silver alloy of composition 30 wt % Ag – 70 wt % Cu and at 777 °C determine the followings:
Show your calculation details in your answer and draw lines on the phase diagram to label the phases and compositions.
a) Determine the mass fractions of α and β phases.
b) Determine the mass fractions of primary α and eutectic microconstituents.
c) Determine the mass fraction of eutectic α.