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Author Spotlight: Rapid Prototyping and Testing of Self-Expanding Nitinol Frames for Transcatheter Implantable Devices
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A Review on Additive Manufacturing Methods for NiTi Shape Memory Alloy Production.

Kristýna Kubášová1, Veronika Drátovská1, Monika Losertová2

  • 1Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 160 00 Prague, Czech Republic.

Materials (Basel, Switzerland)
|March 28, 2024
PubMed
Summary

Nitinol, a smart alloy with shape memory and superelasticity, is challenging to shape conventionally. Additive manufacturing offers a solution for creating complex Nitinol parts while preserving its unique properties.

Keywords:
NiTi alloyadditive manufacturingshape memory alloy

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Area of Science:

  • Materials Science
  • Metallurgy
  • Engineering

Background:

  • Nitinol (Nickel-Titanium alloy) is a key smart material known for its shape memory effect and superelasticity.
  • Its unique properties drive applications in automotive, aviation, space, and medicine.
  • Conventional manufacturing methods for Nitinol, like wire or sheet production, face limitations with complex geometries due to alloy tenacity.

Purpose of the Study:

  • To provide an overview of additive manufacturing techniques for Nitinol.
  • To explore how these methods enable the fabrication of complex Nitinol shapes.
  • To assess the retention of Nitinol's characteristic properties when produced via additive manufacturing.

Main Methods:

  • Review of current additive manufacturing (AM) approaches applicable to Nitinol.
  • Analysis of processing parameters and their impact on material properties.
  • Evaluation of post-processing techniques for AM Nitinol components.

Main Results:

  • Additive manufacturing enables the production of intricate Nitinol components.
  • AM processes can preserve the essential shape memory and superelastic properties of Nitinol.
  • Specific AM techniques show promise for overcoming conventional manufacturing challenges.

Conclusions:

  • Additive manufacturing presents a viable pathway for fabricating complex Nitinol parts.
  • This technology facilitates the expansion of Nitinol applications by enabling previously unachievable designs.
  • Further research into optimizing AM processes for Nitinol is warranted.