9.48 What is the carbon concentration of an iron– carbon alloy for which the fraction of total cementite is 0.10? 9.49 What is the proeutectoid phase for an iron– carbon alloy in which the mass...

9.48
What is the carbon concentration of an iron– carbon alloy for which the fraction of total cementite is 0.10?

9.49
What is the proeutectoid phase for an iron– carbon alloy in which the mass fractions of total ferrite and total cementite are 0.86 and 0.14, respectively? Why?

9.50
Consider 3.5 kg of austenite containing

0.95 wt% C, cooled to below 727°C (1341°F).

(a)
What is the proeutectoid phase?

(b)
How many kilograms each of total ferrite and cementite form?

(c)
How many kilograms each of pearlite and the proeutectoid phase form?

(d)
Schematically sketch and label the result- ing microstructure.