Grain Boundaries & Dynamic Recrystallization

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In summary, the conversation discusses the difficulties in finding information for three research homework topics, including methods of shrinkage of grain boundaries, the increase in hardness in the recovery region, and the concept of dynamic recrystallization. The conversation also suggests resources such as Google and the library for further research and provides links to articles on dynamic recrystallization. The conversation ends with a reminder to not post the same content in multiple forums and to use the "REPORT post" button to request post deletion.
  • #1
deryaa
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please help me!

there are three research homework.and ı don't find anything.these are;

1)what are the methods of shrinkage of grain boundaries?

2)in some situatıon,at recovery region,hardness increases.why?

3)what is dinamic recrystallization and what does effect dinamic recrystallization?

thank you for your helping...
 
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  • #2
Has one tried searching with Google or other search engine? Particularly for "dynamic recrystallization".

If it is not in one's own textbook, what about the library?

Ask oneself - what is happening during recrystallization? What happens to dislocations?

Here is an example for DRX
http://robertson.mse.uiuc.edu/publications/doughertydynamic.pdf

and perhaps

http://igitur-archive.library.uu.nl/dissertations/2002-0801-134134/inhoud.htm

http://www.azom.com/details.asp?ArticleID=3434
 
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  • #3
thank you very much!
 
  • #4
You are quite welcome.

However, please do not post the same post in multiple forums. Please delete the same post in Mechanical & Aerospace forum.

Thank you.
 
  • #5
ı know that.ı wrote same subject in mechanical forum by mistake.and ı can't delete it.
 
  • #6
deryaa said:
ı know that.ı wrote same subject in mechanical forum by mistake.and ı can't delete it.

I'll take care of deleting it. You can use the REPORT post button to ask for that post to be deleted in the future, BTW.
 

Related to Grain Boundaries & Dynamic Recrystallization

What are grain boundaries?

Grain boundaries are the interfaces between individual grains in a polycrystalline material. They are the regions where the crystal lattice of one grain meets the crystal lattice of another grain.

What is dynamic recrystallization?

Dynamic recrystallization is a process by which new grains are formed within a material during deformation, typically at high temperatures. This process helps relieve stress and strain within the material, resulting in improved ductility and strength.

What factors influence grain boundary formation?

The formation of grain boundaries is influenced by factors such as temperature, strain rate, and the presence of impurities or alloying elements. Higher temperatures and slower strain rates tend to promote the formation of larger grains and fewer grain boundaries, while the presence of impurities can lead to the formation of more grain boundaries.

How do grain boundaries affect material properties?

Grain boundaries can significantly affect the mechanical, thermal, and electrical properties of a material. They can act as obstacles to dislocation movement, leading to improved strength and hardness. However, they can also serve as sites for crack initiation and propagation, reducing the overall toughness of the material.

What are some techniques used to study grain boundaries and dynamic recrystallization?

Some common techniques for studying grain boundaries and dynamic recrystallization include optical and electron microscopy, X-ray diffraction, and thermal analysis. These techniques allow for the visualization and quantification of grain boundaries and the analysis of their impact on material properties.

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