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A 50 wt% Ni–50 wt% Cu alloy is slowly cooled from 1400°C (2550°F) to 1200°C (2190°F):

a) At what temperature does the first solid phase form?

b) What is the composition of this solid phase?

c) At what temperature does the liquid solidify?

d) What is the composition of this last remaining liquid phase?

20
40
60
80
100
1600
2800
1500
Liquid
1453°C
2600
1400
Solidus line
Liquidus line
2400
1300
1200
2200
1100
2000
1085°C
1000
20
40
60
80
100
(Cu)
Composition (wt% NI)
(NI)
Temperature ("C)
Temperature ("F)

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