Desirable work hardening for plasticity of metal

We cannot exclude that somewhere there are some that exhibit this behavior.In summary, the conversation discusses the concept of work hardening in metallic materials and whether there are cases where it can enhance the plasticity of the material. While there may be some exotic alloys that exhibit this behavior, from practical experience it is unlikely.
  • #1
zhjj505
1
0
Dear all,

As we know, the work hardening of metallic materials is a result of dislocation movement within the material. But, is there a case in which work hardening is desirable to enhance the plasticity of the metal material? If yes, what's the relationship between plastic deformation and work hardening? Thanks in advance!Damien
 
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  • #2
zhjj505 said:
Dear all,

As we know, the work hardening of metallic materials is a result of dislocation movement within the material. But, is there a case in which work hardening is desirable to enhance the plasticity of the metal material? If yes, what's the relationship between plastic deformation and work hardening? Thanks in advance!


Damien

I'm not a metallurgist, but speaking from practical experience, I have never found a metal that becomes more plastic after work-hardening (or post hardening of any type). It actually sounds impossible, to me.
 
  • #3
From the many alloys I used, none would get more plastic.
But there are so many alloys, with such exotic properties!
 

What is work hardening?

Work hardening is a process in which a metal becomes stronger and more resistant to deformation when it is subjected to plastic deformation, such as rolling, twisting, or bending. It occurs due to the rearrangement of the metal's crystal structure and the formation of dislocations within the material.

Why is work hardening desirable for plasticity of metal?

Work hardening is desirable for plasticity of metal because it increases the metal's strength and ductility. This makes it more capable of enduring mechanical stress and deformation without breaking or becoming permanently deformed. This is important for many industrial applications, such as in the production of structural components.

What factors influence the degree of work hardening in a metal?

The degree of work hardening in a metal depends on several factors, including the metal's composition, microstructure, and processing conditions. Metals with higher amounts of impurities or alloying elements tend to have a higher work hardening rate. The initial grain size and the amount of strain applied also play a role in work hardening.

What is the difference between work hardening and annealing?

Work hardening and annealing are two opposite processes that affect the properties of metals. While work hardening increases the strength and hardness of a metal, annealing involves heating the metal to high temperatures and then slowly cooling it, which makes the metal softer and more ductile. Work hardening can be reversed by annealing, and vice versa.

How can work hardening be controlled in metal processing?

Work hardening can be controlled in metal processing by adjusting the processing conditions, such as the amount and type of deformation applied, the temperature, and the rate of cooling. The choice of alloying elements and the microstructure of the metal can also be manipulated to control the degree of work hardening. Different techniques, such as strain hardening and cold working, can also be used to control work hardening in metals.

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