I need 5,6,7 answered Use the phase diagram below. A copper-nickel alloy (53wt%

Question

I need 5,6,7 answered

Use the phase diagram below. A copper-nickel alloy (53wt% Ni and 47wt%Cu) is A) heated to 1400degree C, and then B) rapidly cooled to 1300 degree C and keep at this temperature for long enough time to reach to an equilibrium condition; and then C) the temperature is quenched to room temperature. Determine the phase/s after each process. Determine the composition of each phase under each condition after the process. Find the weight fraction of each phase/s under each condition after the process. Draw the microstructures after each process with composition and weight fraction being clearly indicated for each phase. Give the composition and the phase of the Au-Cu ally corresponding to point 'a' marked in the phase diagram. Which material has the highest yield strength at room temperature, the Au-Cu alloy with the composition corresponding to point "a', pure element Cu. or pure element Ni? Which material has the highest melting point, the Au-Cu alloy with the composition corresponding to point "a', pure element Cu, or pure element Ni?

Explanation / Answer

5. At point a only single phase alpha (soild) exits which contain 20% Ni and 80 % Cu.

6 alloy marked at point 'a' has higher yield strength. Because pure metal are generally softer and when impurities are added yield strength of material increases.

7. Pure Ni has highest Melting Point. This can be easliy understand by the Raoult's law when impurity is added in a material its Melting point oor freezing point decreases.

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