Mechanical Engineering - Engineering Materials - Discussion

Discussion Forum : Engineering Materials - Section 4 (Q.No. 16)
16.
When a low carbon steel is heated upto lower critical temperature,
there is no change in grain size
the average grain size is a minimum
the grain size increases very rapidly
the grain size first increases and then decreases very rapidly
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

AMAL said:   8 years ago
Because the grain size changes only when it is heated above LCT.
(1)

Rajkotha said:   3 years ago
Low carbon steel is heated up to UPPER critical temperature -the average grain size is a minimum.

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