Effect of isothermal "loading-unloading" cycles at bending deformation on inelastic properties of titanium nickelide-based alloy in B2 phase state | Izvestiya vuzov. Fizika. 2020. № 7. DOI: 10.17223/00213411/63/7/102

Effect of isothermal "loading-unloading" cycles at bending deformation on inelastic properties of titanium nickelide-based alloy in B2 phase state

In the specimens of the Ti_49.3Ni_50.7 (at.%) alloy the influence of mechanocycling by bending in the range of maximum deformations from 4.0% to 22.8% on the amount of shape memory effect and superelasticity was studied. The specimens have been mechanically cycled 11 times by loading and unloading at each value of the maximum deformation at T = 295 K, that is above A_f. The specimens have been mechanically cycled in equipment with V-shaped channel (angle between walls of the channel - 90°) at loading of samples by cylinders of the given radius. After each "loading-unloading" cycle the samples were heated up to 493K, at that the plastic component of the given deformation was fixed. It was found that even a small deformation equal to 4.5%, given to the specimens of Ti_49.3Ni_50.7 (at.%) alloy leads to the appearance of the plastic deformation component. The results presented in this paper should be taken into account when using this alloy in practice as a medical product that is subjected to bending stresses.

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Keywords

эффект памяти формы, сверхэластичность, неупругая деформация, механоциклирование, деформация изгибом, shape memory effect, superelasticity, inelastic deformation, mechanocycling, bending deformation

Authors

Name	Organization	E-mail
Timkin V.N.	Institute of Strength Physics and Materials Science of SB RAS	timk@ispms.tsc.ru
Grishkov V.N.	Institute of Strength Physics and Materials Science of SB RAS	grish@ispms.tsc.ru
Lotkov A.I.	Institute of Strength Physics and Materials Science of SB RAS	lotkov@ispms.tsc.ru
Zhapova D.U.	Institute of Strength Physics and Materials Science of SB RAS	dorzh@ispms.tsc.ru

Всего: 4

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