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In-Situ Investigation of the Fast Lattice Recovery during Electropulse Treatment of Heavily Cold Drawn Nanocrystalline Ni-Ti Wires

  • Petr ŠittnerEmail author
  • Jan Pilch
  • Benoit Malard
  • Remi Delville
  • Caroline Curfs
Chapter
Part of the Hot Topics in Thermal Analysis and Calorimetry book series (HTTC, volume 8)

Abstract

Shape memory alloys (SMA) such as the near equiatomic Ni-Ti alloy [1] have attracted considerable attention for their unique functional thermomechanical properties as superelasticity or shape memory effect deriving from the martensitic transformation. Ni-Ti wires are being produced from extruded bars by multiple hot working passes finished by a final cold drawing. In this so called “cold worked” (as-drawn, hard, etc.) state, the alloy possesses a heavily deformed microstructure resulting from severe plastic deformation [2] consisting of mixture of austenite, martensite, and amorphous phases with defects and internal strain [3].

Keywords

Shape Memory Alloy Recovery Process Electric Resistivity Radial Strain NiTi Wire 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors acknowledge the support of ESRF for performing the in-situ synchrotron experiment (MA-358) and support from projects AV0Z10100520, IAA200100627.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Petr Šittner
    • 1
    Email author
  • Jan Pilch
    • 1
  • Benoit Malard
    • 1
    • 2
  • Remi Delville
    • 3
  • Caroline Curfs
    • 4
  1. 1.Institute of PhysicsPrahaCzech Republic
  2. 2.Now at SIMaPDomaine UniversitaireSaint Martin d’HèresFrance
  3. 3.EMATUniversity of AntwerpAntwerpBelgium
  4. 4.ESRFGrenobleFrance

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