Superelasticity of Cu–Ni–Al shape-memory fibers prepared by melt extraction technique


In the paper, a melt extraction method was used to fabricate Cu–4Ni–14Al (wt%) fiber materials with diameters between 50 and 200 μm. The fibers exhibited superelasticity and temperature-induced martensitic transformation. The microstructures and superelasticity behavior of the fibers were studied via scanning electron microscopy (SEM) and a dynamic mechanical analyzer (DMA), respectively. Appropriate heat treatment further improves the plasticity of Cu-based alloys. The serration behavior observed during the loading process is due to the multiple martensite phase transformation.

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Correspondence to Yong Zhang.

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Li, D., Zhang, S., Liao, W. et al. Superelasticity of Cu–Ni–Al shape-memory fibers prepared by melt extraction technique. Int J Miner Metall Mater 23, 928–933 (2016).

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  • copper nickel aluminum alloys
  • shape memory effect
  • melt extraction method
  • superelasticity