Fatigue response of porous coated titanium biomedical alloys

Apachitei, I.; Lonyuk, B. P.; Fratila‐Apachitei, Lidy E.; Zhou, Jin; Duszczyk, J.

doi:10.1016/j.scriptamat.2009.03.017

Cited by 52 publications

(32 citation statements)

References 16 publications

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“…However, when the amorphous structure is changed to a crystalline one, the introduction of residual stresses may become the main factor controlling the fatigue behavior. Apachitei et al 9 verified a significant influence of residual stresses on the fatigue response of plasma electrolytic oxidized Ti-6Al-4V and Ti-6Al-7Nb with coatings of several micrometers of thickness.…”

Section: Introductionmentioning

confidence: 98%

Effect of the modification by titanium dioxide nanotubes with different structures on the fatigue response of Ti grade 2

et al. 2017

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Nanotechnology is seeing as having potential to raise benefits to several research and application areas. Recently materials with nanostructured surfaces of nanopores, nanotubes and nanowires have become an important investigation field, since their chemical and physical properties may be substantially different from those of the corresponding substrate. In face of the necessity of assuring that such modifications are not deleterious to the mechanical behavior, the purpose of this work was to evaluate the fatigue performance of CP-Ti grade 2 with the surface modified by the formation of nanotubes on their different crystalline structures. The nanotubes layers were produced by anodic oxidation using a potential of 20V during 1h and a solution of glycerol, H 2 O and NaF, and analyzed by scanning electron microscopy. In order to obtain the anatase and rutile structures, annealing treatments were respectively performed at 450°C and 650°C. The axial fatigue tests were conducted in physiological solution at 37°C following the stepwise load increase approach. When compared to the material without surface modification (polished surface), the results showed that the anatase phase did not affect the fatigue response, maintaining the fracture stress in 500 MPa, whereas the rutile phase caused a decrease to 450 MPa.

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Section: Introductionmentioning

confidence: 98%

Effect of the modification by titanium dioxide nanotubes with different structures on the fatigue response of Ti grade 2

et al. 2017

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“…Other studies of fatigue of anodized specimens indicate that layers with micro-scale thickness 27 decreased significantly in fatigue property, while for layers with nanoscale thickness 17 , the decrease is insignificant. The similarity between the fatigue behavior of polished and anodized specimens is an indication that the difference in roughness between polished (Ra = 0.026 µm) and anodized (Ra = 0.041 µm) samples was not significant on fatigue life under the tests conditions carried out here.…”

Section: Fatigue and Fractographic Analysismentioning

confidence: 88%

“…In some cases, hydroxyapatite coatings 28 and some oxide coatings 27 with thickness about some tens of microns and with cracks inside the coatings can damage fatigue properties, since the cracks inside the coatings can induce the fatigue crack nucleation on the surface of the substrate. This behavior was not observed in the oxide film obtained in this study.…”

Section: Fatigue and Fractographic Analysismentioning

confidence: 99%

“…Among the various processes of electrochemical oxidation, micro-arc oxidation (MAO), also known as anodic oxidation or plasma spark electrolytic oxidation (PEO), has been the subject of several studies of surface modification of titanium and its alloys for biomedical use [8][9][11][12][13][14][15] . It is an anodic oxidation technique for deposition of ceramic layers on the surface of metals such as Al, Ti, Mg, Ta , Zn and their alloys 3 .…”

Section: Introductionmentioning

confidence: 99%

“…It has been demonstrated [16][17][18] that the fatigue behavior of an implant material can be strongly influenced by the surface modification process employed. However, there are few publications on the fatigue behavior of titanium and its alloys, subjected to the MAO process 15 . If, on the one hand, the studies and performance characterization of bioactive layers are constantly updated, on the other hand, engineering studies and evaluation of mechanical properties of biomaterials submitted to new variations of surface modification are lagging behind.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue behavior and physical characterization of surface-modified Ti-6Al-4V ELI alloy by micro-arc oxidation

et al. 2012

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Anodizing has proven an effective method for preparing bioactive titanium and has been the subject of many studies regarding the performance and biological characterization of the layers obtained. However, the fatigue behavior of titanium alloys, after undergoing this process is still poorly studied. This study aims to investigate the influence of MAO (Micro-Arc Oxidation) process on the fatigue properties of titanium alloy Ti-6Al-4V. Therefore axial fatigue tests were performed to obtain SxN curves, of specimens in polished and anodized (MAO processed, phosphate salt solution, potential of 290 V) conditions. Roughness measurements, SEM, Raman spectra and X-ray photoelectron spectroscopy (XPS) analyses were used to characterize the features of the modified surface. SEM was also used to analyze the fatigue fractures of the tested specimens. The MAO process, with the parameters used in this investigation, had no influence on the fatigue behavior of the Ti-6Al-4V alloy, when compared to specimens without surface modification.

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Surface modification of valve metals using plasma electrolytic oxidation for antibacterial applications: A review

Rizwan

Alias

Zaidi

et al. 2017

J Biomedical Materials Res

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Plasma electrolytic oxidation (PEO) is an advance technique to develop porous oxidation layer on light metals, primarily to enhance corrosion and wear resistance. The oxidation layer can also offer a wide variety of mechanical, biomedical, tribological, and antibacterial properties through the incorporation of several ions and particles. Due to the increasing need of antimicrobial surfaces for biomedical implants, antibacterial PEO coatings have been developed through the incorporation of antibacterial agents. Metallic nanoparticles that have been employed most widely as antibacterial agents are reported to demonstrate serious health and environmental threats. To overcome the current limitations of these coatings, there is a significant need to develop antibacterial surfaces that are not harmful for patient's health and environment. Attention of the readers has been directed to utilize bioactive glasses as antibacterial agents for PEO coatings. Bioactive glasses are well known for their excellent bioactivity, biocompatibility, and antibacterial character. PEO coatings incorporated with bioactive glasses can provide environment-friendly antimicrobial surfaces with exceptional bioactivity, biocompatibility, and osseointegration. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 590-605, 2018.

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Fatigue response of porous coated titanium biomedical alloys

Cited by 52 publications

References 16 publications

Effect of the modification by titanium dioxide nanotubes with different structures on the fatigue response of Ti grade 2

Effect of the modification by titanium dioxide nanotubes with different structures on the fatigue response of Ti grade 2

Fatigue behavior and physical characterization of surface-modified Ti-6Al-4V ELI alloy by micro-arc oxidation

Surface modification of valve metals using plasma electrolytic oxidation for antibacterial applications: A review

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