The effect of crystallographic texture as a distinct effective parameter on the biocorrosion performance of Ti6Al4V alloy in PBS solution

Amirnejad, Mohabbat; Rajabi, Mohammad; Jamaati, Roohollah

doi:10.1016/j.corsci.2020.109100

Cited by 20 publications

(5 citation statements)

References 40 publications

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“…As the grain systems tend to arrange in a way to decrease the total energy, high dislocation density transforms to low grain boundaries leading to grain refinement 16,17 . As observed in Figure 3, 〈1 0 0〉ǁED fiber fabricated after shot peening could be attributed to the induced grain refinement.…”

Section: Resultsmentioning

confidence: 90%

The synergistic effect of texture and surface roughness on electrophoretic deposited bioactive glass coating

et al. 2023

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To improve the biocompatibility of AISI 316L, bioactive glass (BG) coating of SiO2–CaO–P2O5 which helps bonding with bone implants was used by an electrophoretic deposition method. Before coating deposition, the samples were treated by shot peening, known as an efficient process for metal grain refinement and fatigue properties. The stainless steel 316L was investigated in terms of microstructure, texture, and roughness. This research covers the effects of chosen shot peening parameter on the BG‐coating properties on the obtained results. Shot peening was carried using two different sets of parameters as conventional shot peening, and severe shot peening. Wettability, roughness, microstructure, coating thickness, and corrosion behavior of coated sample were investigated in terms of potentiodynamic polarization and electrochemical impedance spectroscopy in simulated body fluid (SBF) solutions at 37°C. The results indicated that the coating thickness decreased from 35.5 ± 10 µm for coated not peened (CNP) to 20 ± 5 and 17 ± 2 µm for coated conventionally shot‐peened (CCSP) and coated severely shot‐peened (CSSP), respectively. As well as, the water contact angle of CSSP sample was equal to 15.71° which is much lower than CNP (20.7°). The protection ability of the tested samples in the SBF was improved in the following order: CCSP < CNP < CSSP.

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Section: Resultsmentioning

confidence: 90%

The synergistic effect of texture and surface roughness on electrophoretic deposited bioactive glass coating

et al. 2023

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“…In general, the large semicircle of the capacitive loop in the Nyquist plot shows higher interfacial charge transfer resistance and suggests lower electrical conductivity. , As illustrated in the Nyquist Plot (Figure c), the capacitive loop radius of Ti6Al4V-5Cu UG was also observed to be larger than that of the other studied alloys, which indicated that the impedance of the passive film formed on the Ti6Al4V-5Cu UG alloy is significantly higher than that formed on other alloys. The passive/oxide layer formed on the majority of titanium alloys typically exhibits a double-layer structure consisting of a relatively porous outer layer and a dense inner layer, so an electrical equivalent circuit model R s ( Q p R p )( Q b R b ) with two time-constants (Figure e) was selected to fit the EIS data . This model includes the solution resistance ( R s ), the capacitance, and resistance of the porous oxide outer layer ( Q p and R p ), and the capacitance and resistance of the barrier oxide inner layer ( Q b and R b ).…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Bio-Functions of the Ultrafine-Grained Ti6Al4V-5Cu Alloy with a Dual-Phase Honeycomb Shell Structure in Simulated Body Fluid

Liu

Siddiqui

et al. 2023

ACS Biomater. Sci. Eng.

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Titanium alloys are widely used in biomedical applications. However, cases of implant failure due to fatigue fracture and bacterial infection are common. In addition, implants are susceptible to metal ions (Al, V) released by long-term exposure to human body fluids, which causes neuropathy, mental disorders, and other diseases. Thus, development of novel materials to achieve longterm safety of implants is currently a research hotspot. Recently, our research group has developed an ultrafine-grained Ti6Al4V-5Cu alloy with a unique "dual-phase honeycomb shell" (DPHS) structure, which possesses high fatigue strength and stability. This study further affirmed its higher corrosion behavior, antibacterial properties, and cytocompatibility compared to the coarse-grained Ti6Al4V and Ti6Al4V-5Cu alloys. The ultrafine-grained structure of Ti6Al4V-5Cu having DPHS increased the proportion of phases (Cu-rich phases, β-phase, and Ti 2 Cu intermetallic phase) with a lower surface potential. It was observed that the developed microstructure was conducive to a stable configuration of the oxide (passive) layer on the alloy surface. In addition, the low-phase interfacial energies of the ultrafine-grained structure with DPHS even facilitated the improvement of the denseness of the protective passive film and eventually enhanced the corrosion behavior. Besides, the fine-Cu-rich phases and the micro-galvanic couples formed between them and the matrix significantly increased the contact frequency of bacteria, thus increasing the contact sterilization efficiency of the ultrafine-grained Ti6Al4V-5Cu alloy. These results showed that the new ultrafine-grained Ti6Al4V-5Cu alloy has excellent corrosion resistance and biological functions for clinical application.

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“…The more serious corrosion phenomenon is related to the loss of integrity and compactness of the passivation films, and the decrease in the resistance to corrosive ions leads to the discoloration and roughness increase in the surfaces. Although there are partial corrosion areas after immersion corrosion, the surfaces are still integrated compared with the substrate, which is due to the change of surface microstructure after nitriding [55]. 3.6.…”

Section: Static Corrosion Analysismentioning

confidence: 99%

Effect of Nb–Zr–N Alloying Layer on Surface Mechanical Properties and Biocompatibility of Medical 316L Matrix

Ni,

Wu,

Fan

et al. 2023

Coatings

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The aim of this study is to further improve the mechanical properties, corrosion resistance, and biocompatibility of the material. We propose a novel method via double-glow plasma alloying–nitriding processing to obtain a Nb–Zr–N alloying layer on medical 316L (316LVM). The surface phase composition and microstructure were observed via X-ray diffraction and scanning electron microscope, respectively. The three-dimensional confocal map of the samples was measured via laser profilometer, the static water contact angle was measured via optical contact angle measuring instrument, and the surface reflectivity was measured via spectrophotometer. Results revealed that the obvious Nb2N and Zr3N4 phase and uniform nanoscale cytosolic organization are obtained at the argon–nitrogen ratio of 1:1 and of gradient distribution of nitride composition forms in the alloying layer. The addition of nitrogen element significantly improved the hardness, friction, and wear properties of the samples. The nano-scale structure of Nb–Zr–N layer plays a better protective role for the substrate with high corrosion resistance, and the corrosion resistance rate is approximately one order of magnitude higher than that of the matrix. In addition, the nontoxic Nb–Zr–N alloying layer exhibits excellent biocompatibility for improving the adsorption, proliferation, and differentiation of cells. Therefore, our work provides a feasible method by which to modify the surface of the Nb–Zr alloying layer via ion nitriding and shows the prospect of its application in medical and biological fields.

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The effect of crystallographic texture as a distinct effective parameter on the biocorrosion performance of Ti6Al4V alloy in PBS solution

Cited by 20 publications

References 40 publications

The synergistic effect of texture and surface roughness on electrophoretic deposited bioactive glass coating

The synergistic effect of texture and surface roughness on electrophoretic deposited bioactive glass coating

Corrosion Behavior and Bio-Functions of the Ultrafine-Grained Ti6Al4V-5Cu Alloy with a Dual-Phase Honeycomb Shell Structure in Simulated Body Fluid

Effect of Nb–Zr–N Alloying Layer on Surface Mechanical Properties and Biocompatibility of Medical 316L Matrix

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