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D1. Here is a Fe-Ti phase diagram. The Eutectic temperature is 1289 °C. Suppose that you are cooling a sample of 20 wt% Ti-80

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hUsing dener Rule @ 1289°c Lena Rule: Now 1 Zz - 63 C-C3 Wre, T. ST APR 2019 S M T W T F S 1 2 3 4 5 6 S M T W T F S 7 8 9 102019 Week is 09 200 Clear Diagon APRIL Tuesday 02 fet & Ti T - For Phose @ B Criven (z= 15% (2= 287. = 207 C2-C3 - UlFeti: G-hWERT F5 F7 & 7 FB 2019 APRIL 08 Monday A-Liquid : ) B=L+B= Li Fezt a ter Phone & c n oore GE20 C2=28 _ LArt: 63 - C 2 - 0 -WER SD APRIL 2019 12 Friday 10026 From the graph, we candeduce that A is the phase liquid (100% Composition) » E For Brea Now

Used lever rule to calculate phases at B&C. In B, we will apply lever rule till the boundary of liquid phase & Fe2Ti phase whereas in the second case we use till the boundary of Fe & Fe2Ti.

At same chemical composition phase composition remain the same till it reaches the boundary temperature

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