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

• 作 者: Dong-yue Li Shu-ling Zhang Wei-bing Liao Gui-hong Geng Yong Zhang
• 机 构: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
• 出 处: International Journal of Minerals Metallurgy and Materials
• 发表日期: 2016年08期
• 关键词: copper nickel aluminum alloys shape memory effect melt extraction method superel

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.

The microscopic and superelastic 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.