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# quiz1 - Compositions 40 wt Ni(60 wt Phase Fractions Answer...

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Question 1 2 out of 2 points Given the following phase diagram for the Cu-Ni system, what are the stable phases at 20 wt% Cu at 1300 o C. Answer Selected Answer: solid α (Cu-Ni solid solution) Correct Answer: solid α (Cu-Ni solid solution) Response Feedback:

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Question 2 2 out of 2 points Which overall composition C 0 at ~1240 o C will yield a two phase system - liquid phase L and a solid phase - with the given characteristics: Phases Present Phase
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Unformatted text preview: Compositions 40 wt% Ni (60 wt% Phase Fractions Answer Selected Answer: Composition 5 Correct Answer: Composition 5 Response Feedback: Correct You can do this two ways. One is to realize that to have 75% solid α (and 25% L) the composition must be in the two phase region and the overall composition must be 3/4 of the way closer to the α phase boundary than the L phase boundary. Or you can do it mathematically....
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quiz1 - Compositions 40 wt Ni(60 wt Phase Fractions Answer...

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