An alloy with a composition of Fe15 wt C is heated up from 4

An alloy with a composition of Fe–1.5 wt% C is heated up from 400°C to 1600°C. Please answer the following questions.

14. At what temperature does the first liquid phase start to form?
(a) 727°C (b) 1147°C (c) ~920 GPa

15. What is the approximate composition of the first liquid phase to form? (a) 3.3 wt%C (b) 0.6 wt%C (c) 0.76 wt%C

16. What is the approximate composition of the last solid phase to melt? (a) 3.3 wt%C (b) 0.6 wt%C (c) 0.76 wt%C

17. What is the last solid phase to melt?
(a) ?-Ferrite (b) ?-Austenite (c) Fe3C-cementite

(d) ~1230°C

(d) 0.06 wt%C

(d) 0.06 wt%C

(d) L-liquid

18. If this alloy is held at 800°C, what is the fraction (aka the amount) of ? phase (Austenite) at 800°C? (a) 0.91% (b) 0.09% (c) 0.88% (d) 0.13 wt%C

19. If this alloy is held at 800°C, what is the fraction (aka the amount) of Fe3C phase at 800°C? (a) 0.91% (b) 0.09% (c) 0.88% (d) 0.13 wt%C

Solution

14) At what temperature does the first liquid phase start to form?
ans:- 727°C

15)What is the approximate composition of the first liquid phase to form?

ans:- 0.76 wt % c

16) What is the approximate composition of the last solid phase to melt?

ans:- 3.3 wt% c

17. What is the last solid phase to melt?
ans:- Fe3C-cementite

18. If this alloy is held at 800°C, what is the fraction (aka the amount) of phase (Austenite) at 800°C?

ans:-0.13 wt%C

19. If this alloy is held at 800°C, what is the fraction (aka the amount) of Fe3C phase at 800°C?

ans:- 0.91%