Electrochemical Behavior of Novel Superelastic Biomedical Alloys in Simulated Physiological Media Under Cyclic Load

Zhukova, Yulia; Pustov, Yu. A.; Konopatsky, Anton S.; Филонов, М. Р.; Прокошкин, С. Д.

doi:10.1007/s11665-014-1061-1

Cited by 10 publications

(9 citation statements)

References 18 publications

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“…It must be noted that the OCP behavior during the cycling of superelastic Ti‒Zr-based alloys and non-superelastic Ti Grade 2 is different. For superelastic alloys, during cycling, an increase in OCP is observed, which is related to the plastifying impact of the chemomechanical effect, which takes place at the sample/electrolyte interface [52,53,54], with the subsequent establishment of a constant OCP value during cycling, E c . As follows from Table 7, the highest E c values are observed for the 18-13-1 alloy, which can be explained by the higher permeability of thinner oxide films, which does not facilitate the accumulation of dislocations in the near-surface area.…”

Section: Discussionmentioning

confidence: 99%

“…Fracture images analysis (Figure 7) shows that the largest area of the fatigue crack propagation and the smallest mechanical rupture zone are observed for the 18-15 alloy and correspond to its outstanding fatigue life. The delayed failure of this alloy is evidently connected with the effective slowdown of the crack propagation due to the formation of martensite crystals at its tip as well as the stress relaxation via the martensitic transformation mechanisms [53,54].…”

Section: Discussionmentioning

confidence: 99%

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The Electrochemical and Mechanical Behavior of Bulk and Porous Superelastic Ti‒Zr-Based Alloys for Biomedical Applications

et al. 2019

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Titanium alloys are well recognized as appropriate materials for biomedical implants. These devices are designed to operate in quite aggressive human body media, so it is important to study the corrosion and electrochemical behavior of the novel materials alongside the underlying chemical and structural features. In the present study, the prospective Ti‒Zr-based superelastic alloys (Ti-18Zr-14Nb, Ti-18Zr-15Nb, Ti-18Zr-13Nb-1Ta, atom %) were analyzed in terms of their phase composition, functional mechanical properties, the composition and structure of surface oxide films, and the corresponding corrosion and electrochemical behavior in Hanks’ simulated biological solution. The electrochemical parameters of the Ti-18Zr-14Nb material in bulk and foam states were also compared. The results show a significant difference in the functional performance of the studied materials, with different composition and structure states. In particular, the positive effect of the thermomechanical treatment regime, leading to the formation of a favorable microstructure on the corrosion resistance, has been revealed. In general, the Ti-18Zr-15Nb alloy exhibits the optimum combination of functional characteristics in Hanks’ solution, while the Ti-18Zr-13Nb-1Ta alloy shows the highest resistance to the corrosion environment. The Ti-18Zr-14Nb-based foam material exhibits slightly lower passivation kinetics as compared to its bulk equivalent.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Electrochemical and Mechanical Behavior of Bulk and Porous Superelastic Ti‒Zr-Based Alloys for Biomedical Applications

et al. 2019

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“…Corrosion fatigue testing of alloy specimens for bending was carried out in Hanks’ solution [ 15 ] at 37 °C on an experimental setup that provides registration of the electrode potential (open circuit potential, OCP) of the alloy by an electronic potentiostat IPC-Pro MF (Volta Co. Ltd., Saint-Petersburg, Russia) at a given cyclic loading mode (frequency and amplitude) [ 33 , 34 , 35 ]; the size of the samples was 70 mm × 3 mm × 0.5 mm, at least five samples for each test. The temperature (37 ± 1) °С in the working chamber was maintained using a TW-2 Elmi laboratory thermostat (Elmi, Riga, Latvia).…”

Section: Methodsmentioning

confidence: 99%

“… The principal design of the experimental setup for corrosion fatigue testing under cyclic loading [ 33 , 34 , 35 ]. …”

Section: Figurementioning

confidence: 99%

Effect of Thermomechanical Treatment on Structure and Functional Fatigue Characteristics of Biodegradable Fe-30Mn-5Si (wt %) Shape Memory Alloy

et al. 2021

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The Fe-Mn-Si shape memory alloys are considered promising materials for the biodegradable bone implant application since their functional properties can be optimized to combine bioresorbability with biomechanical and biochemical compatibility with bone tissue. The present study focuses on the fatigue and corrosion fatigue behavior of the thermomechanically treated Fe-30Mn-5Si (wt %) alloy compared to the conventionally quenched alloy because this important functionality aspect has not been previously studied. Hot-rolled and water-cooled, cold-rolled and annealed, and conventionally quenched alloy samples were characterized by X-ray diffraction, transmission electron microscopy, tensile fatigue testing in air atmosphere, and bending corrosion fatigue testing in Hanks’ solution. It is shown that hot rolling at 800 °C results in the longest fatigue life of the alloy both in air and in Hanks’ solution. This advantage results from the formation of a dynamically recrystallized γ-phase grain structure with a well-developed dislocation substructure. Another important finding is the experimental verification of Young’s modulus anomalous temperature dependence for the studied alloy system, its minimum at a human body temperature, and corresponding improvement of the biomechanical compatibility. The idea was realized by lowering Ms temperature down to the body temperature after hot rolling at 800 °C.

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“…During the last decade, a fair number of articles on corrosion and electrochemical behavior of biocompatible β-type Ti-Nb-based alloys have been published (for example [76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93]). However, the corrosion resistance of these alloys with added features of superelasticity and shape memory is not sufficiently studied (the number of publication being relatively few [94][95][96][97][98][99][100]), and, therefore, represents an active field of research. More details on this subject can be found in Section 5.…”

Section: Conditions and Perspectives For Shape Memory In Beta Ti Alloysmentioning

confidence: 99%

Thermomechanical Treatment of Ti-Nb Solid Solution Based SMA

Braïlovski¹,

Прокошкин²,

Inaekyan³

et al. 2015

MSFo

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This Chapter is focused on the Ti-Nb-based shape memory alloys for biomedical applications; the principal objective being to understand interrelations between structure and transformation features, static and dynamic functional properties, and conditions of their thermomechanical treatment. This Chapter includes also preliminary study of the surface characteristics of Ti-Nb-based alloys, including their elemental and phase compositions, tribological characteristics, wettability, electrochemical behaviour, and in vitro biocompatibility. The results obtained make it possible to conclude that Ti-Nb-based shape memory alloys represent one of the strongest candidates for a new generation of load-bearing orthopaedic or dental implants with improved biocompatibility, since they combine high biomechanical compatibility of Ti-Ni shape memory alloys with excellent biochemical compatibility of pure titanium. Abbreviations AES -Auger electron spectroscopyA f (A s ) -Finishing (starting) temperature of the reverse martensitic transformation AG -Aging BCC -Body-centered cubic lattice CR -Cold rolling FCT -Face-centered tetragonal representation of BCC lattice HCP -Hexagonal close packed lattice LP(s) -Lattice parameter (parameters) M s -Starting temperature of the direct martensitic transformation NC -Nanocrystalline structure NS -Nanosubgrained structure OCP -Open circuit potential PDA -Post-deformation annealing RT -Room temperature SBF -Simulated body fluid SCM -X-ray strain-controlled temperature scanning experiment, with loading in the mixed parent (β) + thermally-induced martensite (α") phase state SCP -X-ray strain-controlled temperature scanning experiment, with loading in the parent β phase state SE -Superelasticity SF -X-ray strain-free temperature scanning experiment

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Electrochemical Behavior of Novel Superelastic Biomedical Alloys in Simulated Physiological Media Under Cyclic Load

Cited by 10 publications

References 18 publications

The Electrochemical and Mechanical Behavior of Bulk and Porous Superelastic Ti‒Zr-Based Alloys for Biomedical Applications

The Electrochemical and Mechanical Behavior of Bulk and Porous Superelastic Ti‒Zr-Based Alloys for Biomedical Applications

Effect of Thermomechanical Treatment on Structure and Functional Fatigue Characteristics of Biodegradable Fe-30Mn-5Si (wt %) Shape Memory Alloy

Thermomechanical Treatment of Ti-Nb Solid Solution Based SMA

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