MCH $5342$

Homework $4,$ Due May $30{?}^{th}$

The temperature of $1kg$ of the alloy shown in Figure below is lowered slowly until the liquidsolution composition is $18wt\%B$ and the solid solution composition is $66wt\%B.$ Calculate the amount of each phase.

Temf

Figure $9\mathrm{.}34$ shows the microstructural development for an $80wt\%B$ alloy. Consider instead $1kg$ of a $70wt\%B$ alloy. Calculate the amount of $b$ phase at T$3.$

FIGURE $9\mathrm{.}34$ Microstructural development during the slow cooling of a hypereutectic composition.