$(40$ pts$.$ total$)$ Using the Ti$-$Cu phase diagram on page $6,$ if you start with $100kg$ of an Ti$-$Cu mixture at

$1700C$ and $20$ wt$.\%Cu$ and cool down very slowly to points a $(1500C),b(1100C),$

$,$ just above the line$),$ and d $(500C),$ sketch the microstructure associated with each

letter, determine what phases are present at each letter, determine the compositions for each

phase, and determine the weight in each phase.

Point A$)$ Microstructural drawing Phase$($s$)$ present.

Weight $\%$ of copper in each phase

Weight of each phase

Point B$)$ Microstructural drawing Phase$($s$)$ present.

Weight $\%$ of copper in each phase

Weight of each phase

Point C$)$ Microstructural drawing Phase$($s$)$ present.

Weight $\%$ of copper in each phase

Weight of each phase

Point D$)$ Microstructural drawing Phase$($s$)$ present.

Weight $\%$ of copper in each phase

Weight of each phase