Chapter 9 Phase Transformation

Question 1

Describe a phase diagram

Answer 1

• shows the composition as a function of temperature or pressure
• presents the phases in solid solutions

Question 2

What is Eutectic?

Answer 2

• phase transformation

* 1 liquid phase to 2 solid phase

Question 3

What is Eutectoid

Answer 3

• phase transformation

* 1 solid phase ➞ 2 solid phase

Question 4

What is Peritectic?

Answer 4

• phase transformation

* liquid phase + solid phase ➞ solid phase

Question 5

What is the Eutectoid composition of Fe-C?

Answer 5

• Maximum C solubility at 4.6%

Question 6

Important Phases in Fe-C

Answer 6

• Austenite (FCC) max C 1,7%
• Ferrite (BCC) max C 0,2%
• Cementite (Complicated , Fe-C) max C 6,7%