GATE MT 2020 Q8. A heavily cold-worked metal will
GATE MT 2020 Q8. A heavily cold-worked metal will
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Heavily cold working means more deformation or more strain energy. So incubation period decreases and faster recrystallization happens so lower temperature is needed.
Heavily cold working means more deformation or more strain energy. So incubation period decreases and faster recrystallization happens so lower temperature is needed.
See lessRecrystallised at lower temperatures
Recrystallised at lower temperatures
See lessHeavily cold work material has more strained grains. So, recrystallization will take place easily which means it happens at low temperature.
Heavily cold work material has more strained grains. So, recrystallization will take place easily which means it happens at low temperature.
See lessAnswer is D - lower the recrystallization temperature. recrystallization is one of the steps encountered during Annealing of materials. Annealing - consists of Recovery, Recrystallization and grain growth. Driving force for recrystallization is stored energy inside material during cold working. avaRead more
Answer is D – lower the recrystallization temperature.
Stored energy is combination of all energies of vacancies, disloactions, interstitials that are generated during cold wokring.
“Higher is the cold wokring (% deformation) higher is the stored energy during cold working and finally lower will be the recrystallization temperature.”
In a similar manner you can relate other parameters (i.e. deformation temperrrature, intial grain size, purity) to store energy and indirectly to recrystallization temperature.
See lesscorrect answer is option D. @Career Avenues described it best. Thank you.
correct answer is option D. Career Avenue Avenues described it best. Thank you.
See lessLower recrystallisation temperature
Lower recrystallisation temperature
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