Corrosion resistance of new beta type titanium alloy, Ti-29Nb-13Ta-4.6Zr in artificial saliva solution

Gunawarman, B.; Giatmana, D D; Ilhamdi,; Affi, Jon; Fonna, Syarizal; Niinomi, Mitsuo; Nakai, Masaaki

doi:10.1088/1757-899x/352/1/012008

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…Corrosion parameters were extrapolated from OriginPro, with the corrosion rate being calculated through Faraday’s equation as shown below. As all tests were conducted on Ti6Al4V alloy the density ( ρ ) was taken to be 4.5 g/cm 2 and equivalent weight (EW) of 11.9 g [ 46 , 47 ]. As only half of each sample was available to corrode due to application of stop-off lacquer, the area (A) was taken to be half of the theoretical surface area shown in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

Corrosion Resistance of 3D Printed Ti6Al4V Gyroid Lattices with Varying Porosity

et al. 2022

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Corrosion of medical implants is a possible failure mode via induced local inflammatory effects, systemic deposition and corrosion related mechanical failure. Cyclic potentiodynamic polarisation (CPP) testing was utilized to evaluate the effect of increased porosity (60% and 80%) and decreased wall thickness in gyroid lattice structures on the electrochemical behaviour of LPBF Ti6Al4V structures. The use of CPP allowed for the landmarks of breakdown potential, resting potential and vertex potential to be analysed, as well as facilitating the construction of Tafel plots and qualitative Goldberg analysis. The results indicated that 60% gyroid samples were most susceptible to the onset of pitting corrosion when compared to 80% gyroid and solid samples. This was shown through decreased breakdown and vertex potentials and were found to correlate to increased lattice surface area to void volume ratio. Tafel plots indicated that despite the earlier onset of pitting corrosion, both gyroid test groups displayed lower rates of corrosion per year, indicating a lower severity of corrosion. This study highlighted inherent tradeoffs between lattice optimisation and corrosion behaviour with a potential parabolic link between void volume, surface area and corrosion being identified. This potential link is supported by 60% gyroid samples having the lowest breakdown potentials, but investigation into other porosity ranges is suggested to support the hypothesis. All 3D printed materials studied here showed breakdown potentials higher than ASTM F2129′s suggestion of 800 mV for evaluation within the physiological environment, indicating that under static conditions pitting and crevice corrosion should not initiate within the body.

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Section: Methodsmentioning

confidence: 99%

Corrosion Resistance of 3D Printed Ti6Al4V Gyroid Lattices with Varying Porosity

et al. 2022

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“…Thus, the specimens with smaller grains have lower corrosion rates. As Gunawarman et al 33 mentioned, a longer homogenizing process could reduce the pitting corrosion attack. The heat treatment and the high temperatures led to the destruction of twining and grain growth.…”

Section: Materials and Testsmentioning

confidence: 99%

Fatigue life prediction of pre-corroded AZ31 magnesium alloy based on surface topology

Shamsarjmand

Adibnazari

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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This research explored the corrosion effect of NaCl solution on the surface quality of AZ31 magnesium alloy. Cubic-shaped specimens were immersed in standard 3.5% NaCl solution for 1, 2, 3, and 4 hours. The size of corrosion pits, fatigue crack propagation area, and surface topology were characterized. Fatigue tests were carried out on pre-corroded AZ31 specimens under different stress amplitudes. The correlation between the corrosion time and the virtual crack size was obtained. The virtual crack size is a new parameter that can relate the corrosion to the fatigue life. A new model was proposed to map the surface topology on the virtual crack size of pre-corroded AZ31 magnesium alloy. The fatigue life of 1-4-hour pre-corroded AZ31 specimens could be predicted accurately by this new model. The Levenberg-Marquardt and curve-fitting methods were used to obtain the constant parameters. The relative error between the crack size corresponding to the immersion time and the virtual crack size calculated by the proposed model was less than 1%.

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“…Therefore, the mechanical properties of the alloy could match the 5-30 GPa of human bone. So far, the new β-titanium alloys which have been developed mainly include Ti-13Nb-13Zr, Ti-15Mo-5Zr-3A1, Ti-Nb-Ta-Zr-Fe, Ti-12Mo-6Zr-2Fe, Ti-35Nb-7Zr-5Ta, Ti-Fe-Ta, Ti-Fe-Ta-Zr and other alloys [4][5][6][7][8][9][10]. Among them, Ti-Zr-Nb, Ti-Zr-Ni and Ti-Zr-Ta in Ti-Zr-based system still have huge components to be explored and developed, and further heat treatment and surface technology are effective means to improve the performance of biomaterials.…”

Section: Introductionmentioning

confidence: 99%

First principles study of Ti-Zr-Ta alloy phase stability and elastic properties

Zhang

Lin

2023

Mater. Res. Express

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The effects of Ta and Zr content on the stability, elastic properties and electronic structure of Ti-Zr-Ta alloy phase were studied by first principles calculation method based on density functional theory. Moreover, Ti-Zr-Ta alloy was fabricated by spark plasma sintering (SPS) using spherical Ti powder,Ta powder, and Ti-Zr-Ta alloy powder produced by the plasma rotation electrode process (PREP). Afterward, the effects of sintering temperature, Zr and Ta content on the microstructure and mechanical properties of the alloy samples were investigated. The results showed that sintering temperature, Ta and Zr content were the key factors which affected the densification. When the sintering temperature was raised, the relative density and mechanical properties of Ti-Zr-Ta alloy were significantly increased. The first-principles calculation also indicated that Ti-1Zr-Ta possesses the lowest Young’s modulus and the best ductility, showing great potential of biomedical applications which agrees with the results of experimental results of alloy preparation.

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Corrosion resistance of new beta type titanium alloy, Ti-29Nb-13Ta-4.6Zr in artificial saliva solution

Cited by 9 publications

References 11 publications

Corrosion Resistance of 3D Printed Ti6Al4V Gyroid Lattices with Varying Porosity

Corrosion Resistance of 3D Printed Ti6Al4V Gyroid Lattices with Varying Porosity

Fatigue life prediction of pre-corroded AZ31 magnesium alloy based on surface topology

First principles study of Ti-Zr-Ta alloy phase stability and elastic properties

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