Manufacturing and Industrial Engineering - GATE practice papers - Mechanical for Q. 388

Q.  What is the effect of cold working process on material grains? (Marks: 02)
- Published on 19 Oct 15

a. material grains distort permanently
b. material grains distort temporarily and again come back to original shape slowly
c. material grains remains as it is
d. can't say

ANSWER: material grains distort permanently
 
There is no crystallization takes place in cold working process. Material is processed mechanically below crystallization temperature. Thus material grains are permanently distorted.

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