Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 1 (Q.No. 19)
19.
When the steel is normalised, its
Discussion:
15 comments Page 1 of 2.
David Ayotunde said:
2 years ago
Normalizing involves heating the steel to an elevated temperature, followed by slow cooling to room temperature. The heating and slow cooling changes the microstructure of the steel. This reduces the hardness of the steel and will increase its ductility.
(3)
RINI said:
10 years ago
C is the answer because in normalizing temperature increases displacement of atomic planes is easily produces plastic strain easily ductility increases, ultimate tensile strength increases.
Vinay choudhary said:
7 years ago
Answer. D.
Normalizing is carried in still air, rate of cooling is more, it form fine pearlite with small uniform grain. So, it results in higher strength, hardness and low in ductility.
Normalizing is carried in still air, rate of cooling is more, it form fine pearlite with small uniform grain. So, it results in higher strength, hardness and low in ductility.
Abhi said:
8 years ago
Actually, normalizing improves mechanical and electrical properties. It also removes strains produced by cold working. So, it can be said with surety that it increases ductility.
(1)
Sai saketh said:
8 years ago
In the normalising process, the material is heated above critical point temperature and allowed to cool in air. The answer is D only.
Fazal said:
10 years ago
Normalizing raises yield point, ultimate tensile strength & impact strength in steels.
(2)
Salahuddin said:
5 years ago
Reduced ductility means it is comparatively. Compared to annealing, ductility is less.
Abhikant said:
10 years ago
Ductlity increases in normalizing. It decreases as compared to annealed steel.
Shek said:
10 years ago
Comparatively option B i.e. ductility decreases during normalizing process.
Shiva said:
1 decade ago
How if ultimate tensile strength increases then ductility decreases?
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