Shape memory effect in nanocrystalline NiTi alloy processed by high-pressure torsion

Shape memory effect in nanocrystalline NiTi alloy processed by high-pressure torsion

A NiTi alloy was processed by high-pressure torsion for 10 turns followed by post-deformation annealing at 673K for various times. An anneal for 60min gave a nanocrystalline microstructure with a superior shape memory effect and an improvement of more than 40% over the initial state.

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2015-02, Vol.626, p.203-206
Hauptverfasser: Shahmir, Hamed, Nili-Ahmadabadi, Mahmoud, Huang, Yi, Myun Jung, Jai, Seop Kim, Hyoung, Langdon, Terence G.
Format: Artikel
Sprache:eng
Schlagworte:
Crystallization
Intermetallics
Microstructure
Nanocrystals
Nanostructured materials
Nickel base alloys
Nickel compounds
Nickel titanides
NiTi alloy
Severe plastic deformation
Shape memory alloys
Shape memory effect
Titanium compounds
Torsion
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Zusammenfassung:A NiTi alloy was processed by high-pressure torsion for 10 turns followed by post-deformation annealing at 673K for various times. An anneal for 60min gave a nanocrystalline microstructure with a superior shape memory effect and an improvement of more than 40% over the initial state.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2014.12.056