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

SCRIPTA MATERIALIA

卷:117

Article

Tuncer, Nihan¹  Schuh, Christopher A.¹ 

[1] MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

关键词: Shape memory alloys;    Fibers;    Martensitic phase transformations;   

DOI  :  10.1016/j.scriptamat.2016.02.011

来源: Elsevier

【 摘 要 】

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. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free