Homework SourseQuestion 9 1 pts Which one of the following is NOT true rega
Question 9 1 pts
Which one of the following is NOT true regarding strain hardening?
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Question 10 1 pts
Which one of the following is NOT among the benefits of elevated temperatures in hot working?
| The degree of strain-hardening is different for different metals (Metals with a smaller strain-hardening coefficient n will have smaller change in strength with plastic deformation). |
Solution
1. Strain hardening is eliminated in hot working because of recrystalization. But in cold working because of strain hardening force required increases.
Therefore answer is B
Strain hardening will not increase the forces and power required in cold working.
2. In hot working effect of strain hardening is eliminated because of recrystalization. Force requirement reduces.also chemical homogeneous is reduced.
Therefore answer is c
The metallurgical structure will always be same which will not be same.
