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Melt-cast microfibers of Cu-based shape memory alloy adopt a favorable texture for superelasticity

Author(s)
Tuncer, Nihan; Schuh, Christopher A
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Abstract
Continuous production of shape memory alloy (SMA) fibers and microfibers is a non-trivial task due to the challenges associated with their undeformed memory and, for many copper-based SMAs, brittleness in non-engineered forms. Here we demonstrate the direct continuous casting of super-meter-scale Cu-based SMA microfibers into a desirable oligocrystalline microstructure that is not brittle. The melt-casting process used here develops a favorable texture as well, leading to large superelastic strains (above 8%), beyond what is typical for non-single-crystal SMAs. Keywords: Shape memory alloys; Fibers; Martensitic phase transformations
Date issued
2016-03
URI
http://hdl.handle.net/1721.1/115100
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Scripta Materialia
Publisher
Elsevier
Citation
Tuncer, Nihan, and Christopher A. Schuh. “Melt-Cast Microfibers of Cu-Based Shape Memory Alloy Adopt a Favorable Texture for Superelasticity.” Scripta Materialia 117 (May 2016): 46–50 © 2016 Elsevier Ltd
Version: Author's final manuscript
ISSN
1359-6462

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