Can shape memory alloys recover from plastic deformation?

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SUMMARY

Shape memory alloys (SMAs), specifically Nickel-Titanium (NiTi or Nitinol), can recover from plastic deformation through a thermally activated phase transformation. This process allows them to return to their original shape after experiencing significant plastic strain. The underlying mechanisms of plastic deformation remain unchanged, but the unique properties of SMAs enable them to be utilized in various applications where recovery from deformation is essential.

PREREQUISITES
  • Understanding of plastic deformation in metals
  • Familiarity with phase transformation concepts
  • Knowledge of shape memory alloys, particularly Nickel-Titanium
  • Basic principles of thermally activated processes
NEXT STEPS
  • Research the thermodynamic principles behind phase transformations in shape memory alloys
  • Explore the mechanical properties and applications of Nickel-Titanium alloys
  • Learn about the dislocation theory in materials science
  • Investigate the manufacturing processes for shape memory alloys
USEFUL FOR

Materials scientists, mechanical engineers, and researchers interested in the applications and properties of shape memory alloys, particularly in fields requiring materials that can recover from deformation.

e150031
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Hi,

I want to learn that do atoms or crystals dislocate in the plastic deformation of metals.
 
Engineering news on Phys.org
e150031 said:
Hi,

I want to learn that do atoms or crystals dislocate in the plastic deformation of metals.

Yes (if I have interpreted your question correctly).

http://en.wikipedia.org/wiki/Dislocation

CS
 
granpa said:
what about memory metal?

In a shape memory alloy phase transformation is utilized to return to a shape which existed before they were subjected to plastic deformation (via a thermally activated process). Typical example being NiTi (or Nitinol commerically), which is one of the alloys which can recover from enough plastic strain to be viable in various applications. So not really changing the underlying mechanisms for plastic deformation, but adding a twist to it.

http://web.archive.org/web/20030605085042/http://www.sma-inc.com/SMAPaper.html
 

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