Transmission electron microscopy investigation of dislocation slip during superelastic cycling of Ni–Ti wires

Superelastic deformation of thin Ni–Ti wires containing various nanograined microstructures was investigated by tensile cyclic loading with in situ evaluation of electric resistivity. Defects created by the superelastic cycling in these wires were analyzed by transmission electron microscopy. The ro...

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Veröffentlicht in:	International journal of plasticity 2011-02, Vol.27 (2), p.282-297
Hauptverfasser:	Delville, R., Malard, B., Pilch, J., Sittner, P., Schryvers, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Deformation Dislocation slip Dislocations Electric wire Equations of state, phase equilibria, and phase transitions Exact sciences and technology Fundamental areas of phenomenology (including applications) Grain size Inelasticity (thermoplasticity, viscoplasticity...) Martensitic transformation Microstructure Nanograins Nickel Physics Shape memory alloy Slip Solid mechanics Solid-solid transitions Specific phase transitions Static elasticity (thermoelasticity...) Stress-strain relationships Structural and continuum mechanics Superelasticity Transmission electron microscopy
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Zusammenfassung:	Superelastic deformation of thin Ni–Ti wires containing various nanograined microstructures was investigated by tensile cyclic loading with in situ evaluation of electric resistivity. Defects created by the superelastic cycling in these wires were analyzed by transmission electron microscopy. The role of dislocation slip in superelastic deformation is discussed. Ni–Ti wires having finest microstructures (grain diameter
ISSN:	0749-6419 1879-2154
DOI:	10.1016/j.ijplas.2010.05.005