$1.$ Using an iron carbon phase diagram $($Attached$),$ identify the Phases in Fe$$Fe$3$C Phase Diagram and complete the blanks.

$\backslash$alpha $-$ferrite $-$ solid solution of C in BCC Fe

$$ Stable form of iron at room temperature.

$$ The maximum solubility of C is $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ wt$\%$

$$ Transforms to FCC $\backslash$gamma $-$austenite at $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ oC

$\backslash$gamma $-$austenite $-$ solid solution of C in FCC Fe

$$ The maximum solubility of C is $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$wt $\%.$

$$ Transforms to BCC $\backslash$delta $-$ferrite at $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ oC

$$ Is not stable below the eutectic temperature $(\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ oC$)$ unless cooled rapidly.

$\backslash$delta $-$ferrite solid solution of C in BCC Fe

$$ The same structure as $\backslash$alpha $-$ferrite

$$ Stable only at high T$,$ above $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ oC

$$ Melts at $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$oC

Fe$3$C $($iron carbide or cementite$)$

$$ This intermetallic compound is metastable, it remains as a compound indefinitely at room T$,$ but decomposes $($very slowly, within several years$)$ into $\backslash$alpha $-$Fe and C $($graphite$)$ at $650-700\backslash$deg C

Fe$-$C liquid solution