Conventional Materials

Question 1

What are the three phases in the Fe-C phase diagram

Answer 1

• Ferrite (alpha phase)
• Austenite (gamma phase)
• Cementite

Question 2

What is the maximum amount of carbon in ferrite?

Answer 2

0.02wt%

Question 3

What is the maximum amount of carbon in Austenite?

Answer 3

2.14wt%

Question 4

What is the Eutectoid temperature of ferrite?

Answer 4

727 degrees celcius

Question 5

What is the Eutectic temperature of Austenite?

Answer 5

1147 degrees celcius

Question 6

What is the usual carbon content in Steels?

Answer 6

C < 1.2wt%

Question 7

What is the usual carbon content in Cast Irons?

Answer 7

C < 4.5wt%

Question 8

What type of steel occurs at the eutectoid point?

Answer 8

Pearlite (alpha + Fe3C)

Question 9

What type of steels come behind the eutectoid point?

Answer 9

Hypoeutectoid Steel

Question 10

What type of steels come after the eutectoid point?

Answer 10

Hypereutectoid Steel

Question 11

What does Austenite transform to after slow cooling?

Answer 11

Pearlite and a proeutectoid phase

Question 12

What does Austenite transform to after moderate cooling?

Answer 12

Bainite

Question 13

What does Austenite transform to after a rapid quench?

Answer 13

Martensite