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.
Rajkotha said:
4 years ago
Combined carbon form of iron-hard and gives a fine-grained crystalline structure.
Nikunj Paji said:
5 years ago
C is the correct answer.
Vicky said:
6 years ago
I think the correct answer is C.
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.
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.
Manish said:
9 years ago
The Answer should be C.
Bhanu Pratap said:
9 years ago
The correct answer should be [c].
Student1 said:
9 years ago
Free carbon makes the iron hard and brittle (fine-grained crystal structure).
Rushikesh said:
10 years ago
Free carbon only possible when decomposition of cementite. It decompose into Fe (ferrite) + graphite as free carbon.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers