Question

In hot working of material, the continuous reformation of grains can be possible in material.

(a) True

(b) False

I had been asked this question in an interview for job.

I'd like to ask this question from Advantage and Disadvantage of Hot and Cold Forming topic in portion Types of Die & Metal Forming Processes of Casting-Forming-Welding II

Answer 1

Right answer is (a) True

To elaborate: In hot working of materials, it is possible to continuously reform the grains in material. It requires proper controlling of temperature and rate of hot working. In hot working, very favourable grain size can be obtained which further enhances the mechanical properties of material. And no any residual stresses are present in the material during hot working which also gives rise to better mechanical properties.