Two parts have been made of the same material but one was fo

Two parts have been made of the same material, but one was formed by cold working and the other by hot working. Explain the differences you might observe between the two.

Solution

HOT WORKING COLD WORKING

1)metals does not show work hardening effect 1)metal shows workhardening effect

2)hot worked surface has metal oxides on it 2)cold worked metal oxides free

3)this surfece finish is not good 3)this surface finish is smooth

4)requires less energy to deform 4)requires more energy

5)need to do pickling to remove oxides 5)need not do any pickling