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

Potomati, Fernanda; Giordani, E.J.; Duarte, Laís T.; Alcântara, Nelson Guedes de; Bolfarini, Claudemiro

doi:10.1590/s1516-14392012005000012

Cited by 22 publications

(8 citation statements)

References 27 publications

(43 reference statements)

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“…It is important to mention that these fatigue data were all obtained using exactly the same experimental conditions, such as axial loading, stress ratio R = 0.1 and frequency in the range of 5-20 Hz. Micro-arc oxidation 12 and chemical etching 3 produced modified layers with R z value smaller than the critical R z in the curve of Figure 5, and therefore the fatigue strength The boundary conditions and the methodology are published elsewhere 17 . The calculations show that values in the range of ~400 MPa to 650 MPa can be obtained in critical parts of the stem and would induce fatigue cracks before the limit of 5x10 6 cycles established by the biomedical standards for such components.…”

Section: Discussionmentioning

confidence: 99%

Assessment of the Fatigue Behavior of Ti-6Al-4V ELI Alloy with Surface Treated by Nd:YAG Laser Irradiation

et al. 2019

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The effect of a surface treatment by Nd:YAG laser irradiation on the fatigue behavior of Ti-6Al-4V ELI was studied. Axial fatigue tests were performed to obtain S-N curves in polished and laser treated conditions. Roughness measurements and scanning electron microscopy were used to characterize the features of the modified surface. A reduction in the fatigue strength of around 35% was obtained after the laser treatment of the material surface. Although the surface roughness was in the micrometer scale, a notch effect was suggested to be the reason for the deleterious influence of the laser on the fatigue strength. The reduction in the fatigue strength obligatory demands redesign of implants for laser modified surfaces of Ti-6Al-4V alloy.

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Section: Discussionmentioning

confidence: 99%

Assessment of the Fatigue Behavior of Ti-6Al-4V ELI Alloy with Surface Treated by Nd:YAG Laser Irradiation

et al. 2019

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“…There are certainly reports [96–100] of significant impairment of fatigue life, for both Al and Mg alloys. There have been very few indications of any improvement, although it has been reported [101] that no change occurs with the Ti–6Al–4V alloy. It is thus certainly an area of concern.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Clyne

Troughton

2018

International Materials Reviews

402

225

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The review describes recent progress on understanding and quantification of the various phenomena that take place during plasma electrolytic oxidation, which is in increasing industrial use for production of protective coatings and other surface treatment purposes. A general overview of the process and some information about usage of these coatings are provided in the first part of the review. The focus is then on the dielectric breakdown that repeatedly occurs over the surface of the work-piece. These discharges are central to the process, since it is largely via the associated plasmas that oxidation of the substrate takes place and the coating is created. The details are complex, since the discharge characteristics are affected by a number of processing variables. The interrelationships between electrical conditions, electrolyte composition, coating microstructure and rates of growth, which are linked via the characteristics of the discharges, have become clearer over recent years and these improvements in understanding are summarised here. There is considerable scope for more effective process control, with specific objectives in terms of coating performance and energy efficiency, and an attempt is made to identify key points that are likely to assist this.

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“…Other studies have been noted where a decrease in fatigue life was reported for other Al and Mg alloys [ 178 , 179 , 180 ]. However, for the PEO process carried out on Ti 6 Al 4 V alloy, no change in fatigue life occurred [ 181 ]. After completion of the PEO process, residual electrolytes remained in the coating.…”

Section: Mechanical Attributes Of Peo Coatingsmentioning

confidence: 99%

Plasma Electrolytic Oxidation (PEO) Process—Processing, Properties, and Applications

et al. 2021

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Plasma electrolytic oxidation (PEO) is a novel surface treatment process to produce thick, dense metal oxide coatings, especially on light metals, primarily to improve their wear and corrosion resistance. The coating manufactured from the PEO process is relatively superior to normal anodic oxidation. It is widely employed in the fields of mechanical, petrochemical, and biomedical industries, to name a few. Several investigations have been carried out to study the coating performance developed through the PEO process in the past. This review attempts to summarize and explain some of the fundamental aspects of the PEO process, mechanism of coating formation, the processing conditions that impact the process, the main characteristics of the process, the microstructures evolved in the coating, the mechanical and tribological properties of the coating, and the influence of environmental conditions on the coating process. Recently, the PEO process has also been employed to produce nanocomposite coatings by incorporating nanoparticles in the electrolyte. This review also narrates some of the recent developments in the field of nanocomposite coatings with examples and their applications. Additionally, some of the applications of the PEO coatings have been demonstrated. Moreover, the significance of the PEO process, its current trends, and its scope of future work are highlighted.

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

Cited by 22 publications

References 27 publications

Assessment of the Fatigue Behavior of Ti-6Al-4V ELI Alloy with Surface Treated by Nd:YAG Laser Irradiation

Assessment of the Fatigue Behavior of Ti-6Al-4V ELI Alloy with Surface Treated by Nd:YAG Laser Irradiation

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Plasma Electrolytic Oxidation (PEO) Process—Processing, Properties, and Applications

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