Melt-cast microfibers of Cu-based shape memory alloy adopt a favorable texture for superelasticity
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...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2018
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| Online Access: | http://hdl.handle.net/1721.1/115100 https://orcid.org/0000-0001-7660-7210 https://orcid.org/0000-0001-9856-2682 |
| Summary: | 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 |
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