Corrosion anisotropy of titanium deformed by the hydrostatic extrusion

Chojnacka, A.; Kawałko, Jakub; Koscielny, H.; Guśpiel, J.; Drewienkiewicz, A.; Bieda, M.; Pachla, W.; Kulczyk, Mariusz; Sztwiertnia, K.; Bełtowska-Lehman, E.

doi:10.1016/j.apsusc.2017.07.231

Cited by 29 publications

(11 citation statements)

References 19 publications

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“…[30] The protective properties of Ti oxide layers against corrosion attack depend on the microstructure of the substrate material. [31,32] Grain boundaries and dislocations are the preferential oxidation sites, so their high number in deformed Ti provides more stable oxide layers, thereby demonstrating their enhanced propensity for repassivation in the case of local disruption. [20] Moreover, Ti oxide layers formed on Ti subjected to multiple-stage cold rolling are less defective than in case of conventional, microcrystalline CP-Ti, as was confirmed by Mott-Schottky analysis.…”

Section: Introductionmentioning

confidence: 99%

Surface Properties and Mechanical Performance of Ti-Based Dental Materials: Comparative Effect of Valve Alloying Elements and Structural Defects

Sotniczuk

Majchrowicz

Kuczyńska-Zemła

et al. 2021

Metall Mater Trans A

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Two approaches can be taken when designing properties of the native oxide layers formed on Ti-based biomedical materials: (i) changing the chemical composition of the substrate by adding biocompatible, valve alloying elements, and (ii) changing the microstructure of the substrate—especially its level of defectiveness—through large plastic deformation. However, especially in the aggressive fluoridated oral environment, it is still unknown what factor is more effective in terms of enhancing oxide layer protectiveness against biocorrosion: (i) the presence of valve alloying elements, or (ii) a high number of structural defects. To gain knowledge about the separate influence of both of these factors, surface properties were examined for commercially pure Ti and Ti–Nb–Ta–Zr alloy in microcrystalline state as well as after multiple-pass cold rolling, a process that can be readily scaled up to the industrial level. This study showed that while valve-alloying elements and structural defects individually have a beneficial effect on Ti oxide layer properties in fluoridated medium, they not have to act in a synergistic manner. These findings have to be taken into account when designing future Ti-based dental materials together with analyzing their mechanical performance with respect to mechanical strength and elastic properties.

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Section: Introductionmentioning

confidence: 99%

Surface Properties and Mechanical Performance of Ti-Based Dental Materials: Comparative Effect of Valve Alloying Elements and Structural Defects

Sotniczuk

Majchrowicz

Kuczyńska-Zemła

et al. 2021

Metall Mater Trans A

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“…It is known that the OCP value varies with immersion time in a corrosion environment due to changes on the surface material and indicates its tendency to electrochemical oxidation . Figure presents the changes of the OCP against time for tested Ti–6Al–4V samples in the Ringer's solution at 37°C.…”

Section: Resultsmentioning

confidence: 99%

Influence of regulated modification of nitride layer by oxygen on the electrochemical behavior of Ti–6Al–4V alloy in the Ringer's solution

Pohrelyuk

Ткачук

Proskurnyak

et al. 2019

Materials & Corrosion

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The corrosion behavior of oxynitrided Ti-6Al-4V alloy was investigated in the Ringer's solution (simulated body fluid) at a temperature of 37°C. The oxynitriding of the alloy was carried out by leaking controlled oxygencontaining medium into the reaction chamber at the final stage of the nitride formation. It was determined that oxynitriding improved corrosion resistance of Ti-6Al-4V alloy as it provided lower corrosion current density by 1.3-1.5 times and higher corrosion potential. In this paper, we analyzed that the resistance of the double layer had increased with the increase of the oxygen content in titanium oxynitride. Its value was higher compared with untreated alloy, indicating higher corrosion resistance of the oxynitrided one. K E Y W O R D S corrosion, oxynitriding, Ringer's solution, Ti-6Al-4V alloy

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“…Titania layer formed on the HE-manufactured Ti has shown to be slightly thicker and covered with a greater amount of hydroxyl groups when compared to the unprocessed substrates . In addition, hydrostatically extruded titanium demonstrates anisotropy of corrosion resistance in synthetic saliva . Overall, nanostructuring has shown to result in the presence of more compact and stable passive films on the surfaces of the SPD-processed materials because the improved diffusion of elements takes place …”

Section: Discussionmentioning

confidence: 99%

Texture-Governed Cell Response to Severely Deformed Titanium

Wojtas

Mzyk

Kawałko

et al. 2020

ACS Biomater. Sci. Eng.

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The phenomenon of superior biological behavior observed in titanium processed by an unconventional severe plastic deformation method, that is, hydrostatic extrusion, has been described within the present study. In doing so, specimens varying significantly in the crystallographic orientation of grains, yet exhibiting comparable grain refinement, were meticulously investigated. The aim was to find the clear origin of enhanced biocompatibility of titanium-based materials, having microstructures scaled down to the submicron range. Texture, microstructure, and surface characteristics, that is, wettability, roughness, and chemical composition, were examined as well as protein adsorption tests and cell response studies were carried out. It has been concluded that, irrespective of surface properties and mean grain size, the (101̅ 0) crystallographic plane favors endothelial cell attachment on the surface of the severely deformed titanium. Interestingly, an enhanced albumin, fibronectin, and serum adsorption as well as clearly directional growth of the cells with preferentially oriented cell nuclei have been observed on the surfaces having (0001) planes exposed predominantly. Overall, the biological response of titanium fabricated by severe plastic deformation techniques is derived from the synergistic effect of surface irregularities, being the effect of refined microstructures, surface chemistry, and crystallographic orientation of grains rather than grain refinement itself.

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Corrosion anisotropy of titanium deformed by the hydrostatic extrusion

Cited by 29 publications

References 19 publications

Surface Properties and Mechanical Performance of Ti-Based Dental Materials: Comparative Effect of Valve Alloying Elements and Structural Defects

Surface Properties and Mechanical Performance of Ti-Based Dental Materials: Comparative Effect of Valve Alloying Elements and Structural Defects

Influence of regulated modification of nitride layer by oxygen on the electrochemical behavior of Ti–6Al–4V alloy in the Ringer's solution

Texture-Governed Cell Response to Severely Deformed Titanium

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