Shape memory and superelasticity in polycrystalline Cu-Al-Ni microwires
Name
Schuh-Shape memory and superelasticity with figures.pdf
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1.29 MB
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Checksum (MD5)
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Author(s)
Chen, Ying
Zhang, Xuexi
Dunand, David C.
Schuh, Christopher A.
Date Issued
October 2009
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Citation
Chen, Ying et al. “Shape memory and superelasticity in polycrystalline Cu–Al–Ni microwires.” Applied Physics Letters 95.17 (2009): 171906.
Version
Author's final manuscript
Abstract
We report a strategy to significantly improve the ductility and achieve large superelastic and shape memory strains in polycrystalline Cu–Al–Ni shape memory alloys that are normally brittle. We use a liquid-phase (Taylor) wire forming process to obtain microwires of 10–150 μm diameter with a bamboo grain structure. The reduction of grain boundary area, removal of triple junctions, and introduction of a high specific surface area in the wire decrease constraints on the martensitic transformation, and permit both superelasticity and stress-assisted two-way shape memory with recoverable strains as high as 6.8%.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1063/1.3257372
