Question

2. The figure below shows a phase diagram of Cu-Ni (binary) system. An alloy composition of 70 wt.% Ni and 30 wt.% Cu is slowly heated from a temperature of 1300 °C (2370 F). 0 20 40 60 80 100 1600 2800 1500 Liquid 1453°C 2600 1400 Temperature (°C) Liquidus line Solidus line 2400 1300 ? + L B 1200 2200 ? 1100 1085C A 2000 1000 0 20 40 60 80 100 (Cu) Composition (wt% Ni) (Ni) Temperature (°F) Answer the following questions: a) At what temperature does the first liquid phase form? b) What is the composition of the liquid phase? 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?

          2. The figure below shows a phase diagram of Cu-Ni (binary) system. An alloy composition
of 70 wt.% Ni and 30 wt.% Cu is slowly heated from a temperature of 1300 °C (2370 F).
0 20 40 60 80 100
1600
2800
1500
Liquid
1453°C
2600
1400
Temperature (°C)
Liquidus line
Solidus line
2400
1300
? + L
B
1200
2200
?
1100
1085C
A
2000
1000
0 20 40 60 80 100
(Cu) Composition (wt% Ni) (Ni)
Temperature (°F)
Answer the following questions:
a) At what temperature does the first liquid phase form?
b) What is the composition of the liquid phase?
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?

2. The figure below shows a phase diagram of Cu-Ni (binary) system. An alloy composition
of 70 wt.% Ni and 30 wt.% Cu is slowly heated from a temperature of 1300 °C (2370 F).
0 20 40 60 80 100
1600
2800
1500
Liquid
1453°C
2600
1400
Temperature (°C)
Liquidus line
Solidus line
2400
1300
? + L
B
1200
2200
?
1100
1085C
A
2000
1000
0 20 40 60 80 100
(Cu) Composition (wt% Ni) (Ni)
Temperature (°F)
Answer the following questions:
a) At what temperature does the first liquid phase form?
b) What is the composition of the liquid phase?
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?

Added by Regina R.

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