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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Bibliographic Details
Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 626; pp. 203 - 206
Main Authors Shahmir, Hamed, Nili-Ahmadabadi, Mahmoud, Huang, Yi, Myun Jung, Jai, Seop Kim, Hyoung, Langdon, Terence G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2015
Subjects
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
Severe plastic deformation
NiTi alloy
Nanostructured materials
Shape memory effect
Crystallization
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Summary: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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ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2014.12.056