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].
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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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Šittner, P., Pilch, J., Malard, B., Delville, R., Curfs, C. (2011). In-Situ Investigation of the Fast Lattice Recovery during Electropulse Treatment of Heavily Cold Drawn Nanocrystalline Ni-Ti Wires. In: Šesták, J., Mareš, J., Hubík, P. (eds) Glassy, Amorphous and Nano-Crystalline Materials. Hot Topics in Thermal Analysis and Calorimetry, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2882-2_15
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DOI: https://doi.org/10.1007/978-90-481-2882-2_15
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