Study of two-way shape memory behavior of amorphous-crystalline TiNiCu melt-spun ribbons . Materials Science Forum Volume 738-739, 2013, Pages 352-356

Recently we reported on the development of a composite material exhibiting reversible shape memory effect. A Ti-25Ni-25Cu (at.%) alloy was obtained by the melt spinning technique as amorphous-crystalline ribbons with a thickness of approximately 40 μm. The thickness of the amorphous and crystalline layers (da and dc, respectively) was varied by electrochemical polishing. It has been ascertained that with varying the relationship dc/da the martensite transformation and shape-recovery temperatures do not actually change, while the minimum radius of the ribbon bending decreases from 8.0 mm to 2.4 mm with increasing the relationship dc/da from 0.33 to 1.40. The maximum reversible strain comprises 0.4% at dc/da = 0.82. On the basis of experimental data obtained the phenomenological description, providing an explanation for nature of the phenomena taking place in the rapidly quenched amorphous-crystalline ribbon composite, has been proposed. © (2013) Trans Tech Publications, Switzerland.



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Author keywords

Amorphous-crystalline structure; Composite materials; Martensitic transformation; Melt-spun ribbon; Shape memory alloy; Two-way shape memory effect



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Indexed keywords

Crystalline layers; Experimental datum; Martensite transformations; Melt-spinning techniques; Melt-spun ribbons; Phenomenological description; Reversible shape memory effects; Reversible strain; Shape memory behavior; Two-way shape memory effect