Nonlinear Phenomena in Complex Systems, 2019, Vol.22, No.4, pp.354

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2019, Vol.22, No.4, pp.354 - 361

Dynamics of Nonlinear Processes of Corrosion of Non-Nikel Titanium Shape Memory Alloy
A. G. Kolmakov, E. O. Nasakina, M. A. Sevostyanov, S. V. Konushkin, K. V. Sergiyenko, and M. L. Kheifetz

Research of dynamics of nonlinear corrosion processes of non-nickel titanium shape memory alloy Ti-20Nb-10Ta is performed. Samples were placed in mediums imitating physiological liquids, with ðÍ from 1.68 to 9.18. 3 types of samples were used: in an initial state, after thermal (annealing) and surface mechanical treatment. After annealing, there is a slight narrowing of the X-ray peaks, which indicates stress relief. New phases are not allocated. The alloy is a substitution solution with a b-Ti lattice. The greatest release of titanium ions was observed in solution with the sourest environment and samples after annealing. Release of niobium and tantalum ions in solution with any acidity was not observed.

Key words: titanium, shape memory alloy, tantalum, niobium, corrosion resistance, depassivating action, pitting formation

DOI: https://doi.org/10.33581/1561-4085-2019-22-4-354-361

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