Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 1 (Q.No. 47)
47.
Free carbon in iron makes the metal
Discussion:
10 comments Page 1 of 1.
Sathia said:
8 years ago
Presence of Carbide in iron only makes it harder, in this case for, free carbon in iron, iron becomes softer and increases coarse grained crystalline structure, hence this results also in increased tensile strength.
This case is true for nodular cast iron.
This case is true for nodular cast iron.
Rushikesh said:
10 years ago
Free carbon only possible when decomposition of cementite. It decompose into Fe (ferrite) + graphite as free carbon.
Rajkotha said:
4 years ago
Combined carbon form of iron-hard and gives a fine-grained crystalline structure.
Student1 said:
9 years ago
Free carbon makes the iron hard and brittle (fine-grained crystal structure).
Dhotre Ganesh said:
8 years ago
Cementite (hard & brittle) decomposes into ferrite (soft) and graphite.
Abhilash Sawant said:
9 years ago
Carbon increases hardness and corrosiveness also.
Bhanu Pratap said:
9 years ago
The correct answer should be [c].
Vicky said:
6 years ago
I think the correct answer is C.
Nikunj Paji said:
5 years ago
C is the correct answer.
Manish said:
9 years ago
The Answer should be C.
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