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Phase transformation and functional properties of submicrocrystalline Ni49.8Ti50.2 shape memory alloy

Keywords:

V.S. Kalashnikov – Post-graduate Student, Kotel’nikov Institute of Radio Engineering, and Electronics Russian Academy of Sciences
A.V. Petrov – IRE RAS Post-graduate Student, Kotel’nikov Institute of Radio Engineering, and Electronics Russian Academy of Sciences
V.V. Koledov – Dr. Sc. (Phis.-Math.), Professor, Leading Researcher, Kotel’nikov Institute of Radio Engineering, and Electronics Russian Academy of Sciences


A comparative study of functional properties of submicrocrystalline (SMC)and high grained (HG) Ti-Ni shape memory alloy (SMA) was performed on a specially designed setup. It was demonstrated, that SMC samples possess as far as two times higher reactive stresses and durability. A model qualitatively explaining the enhancing of functional properties was proposed. SMA integral characteristics’ of «functional inflexibility» and «energy capacity» were introduced.
References:

  1. Otsuka K., Ren X. Physical metallurgy of Ti-Ni-based shape memory alloys // Progress in Materials. 2005. № 6. V. 50. P. 511–678.
  2. Gunther V.E., Dambaev G.Ts., Sysoliatin P.G., et al. Delay law and new class of materials and implants in medicine. Northampton, MA: STT. 2000. R. 432.
  3. Valiev R.Z., Gunderov D.V., Lukyanov A.V., Pushin V.G. Mechanical behavior of nanocrystalline TiNi alloy produced by SPD // Journal of Materials Science. 2012. V. 47. Is. 22. R. 7848-7853.

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