1) A Cu-Ni alloy with 26 wt%Ni (the balance is wt%Cu) is slowly cooled from 1500

Question

1) A Cu-Ni alloy with 26 wt%Ni (the balance is wt%Cu) is slowly cooled from 1500oC to a temperature at which the first solid starts to form.

Using the magnified section of the Cu-Ni phase diagram shown inFig. 9.3 (Callister 8e), what is the composition of the liquid at that temperature?

Express your answer in wt%Ni. A maximum tolerance of +/- 3% is allowed in your answer.

2) A Cu-Ni alloy with 50 wt%Ni (the balance is wt%Cu) is slowly cooled from 1500oC to a temperature at which the last liquid solidifies.

Using the magnified section of the Cu-Ni phase diagram shown inFig. 9.3 (Callister 8e), what is the composition of the solid at that temperature?

Express your answer in wt%Ni. A maximum tolerance of +/- 3% is allowed in your answer.

3) A Cu-Ni alloy with 26 wt%Ni (the balance is wt%Cu) is slowly cooled from 1500oC to a temperature at which the first solid begins to form.

Using the magnified section of the Cu-Ni phase diagram shown inFig. 9.3 (Callister 8e), what is the composition of the solid at that temperature?

Express your answer in wt%Ni. A maximum tolerance of +/- 5% is allowed in your answer.

Explanation / Answer

3)we draw a straight line at 26%Ni from 1500 down till it meets liquidus line then we draw a horizontal line from that point onto the solidus line.this point will be the composition of liquid at that temperature.from figure we can see it is somewhere around 37-40% Ni 2)using the same procedure as above but we use the solidus line first and draw a horizontal line to the liquidus line so we get around30-35% Ni 1)using similar formulation we get around 18-21% Ni

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.