$4$

$[14$Pts$]$

C$2.$ The following questions refer to the phase diagram below:

Composition $($at$\%$ C$)$

For a $8kg$ steel alloy containing $1\mathrm{.}75wt\%C,$ answer the following:

$($a$)$ What phases are present at $800C$ and at $1150C?$

$($b$)$ i$)$ What is the proeutectoid phase for this alloy?

ii$)$ For this specific composition, what is the approximate temperature range that the proeutectoid phase would be formed in$?$

$($c$)$ Just above the eutectoid temperature,

i$)$ What is the approximate composition of each phase?

ii$)$ How many kg of each phase is present?