Effect of Cold Deformation Degree on Recrystallization Nucleation Mechanism and Recrystallization Grain Size

Effect of Cold Deformation Degree on Recrystallization Nucleation Mechanism and Recrystallization Grain Size

Crystalline recrystallization requires a minimum amount of deformation called critical deformation.
However, no recrystallization occurs when the deformation is less than the critical deformation.
When the deformation is higher than the critical deformation, it can recrystallize but the grain is coarse.
With the increase of deformation, the grain size becomes smaller.
There are two nucleation mechanisms
1. Arched nucleation at the grain boundary: It is easy to occur when the grain deformation is small.
2. Subcrystalline combined nucleation or direct growth:...

What is the difference between the microstructure and properties of the same metal material after cold and hot deformation? What is metal recrystallization

Cold deformation, such as cold heading and stamping, makes the metal work hardening, i.e., dislocation density increases, grain deformation, strength and hardness increase, and plasticity and toughness decrease.
Thermal deformation such as forging, hot rolling, etc. does not produce significant work hardening, grains or equiaxed grains.
Recrystallization is a process in which deformed grains nucleate and grow at high temperature (recrystallization temperature) to form new equiaxed grains.