Prediction of the surface finishing roughness effect on the fatigue resistance of Ti-6Al-4V ELI for implants applications

Silva, Paulo Sergio Carvalho Pereira da; Campanelli, Leonardo Contri; Claros, Cesar Adolfo Escobar; Ferreira, Tales; Oliveira, Diego Pedreira de; Bolfarini, Claudemiro

doi:10.1016/j.ijfatigue.2017.06.007

Cited by 29 publications

(22 citation statements)

References 15 publications

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“…Da Silva et al 11 reported a prediction method for the fatigue limit (σ f ) of Ti-6Al-4V ELI when it is correlated to a theoretical semi-circular notch described by the R z parameter. As reproduced in Figure 6, it is possible to predict that the fatigue strength for R z = 13 μm is 545 MPa.…”

Section: Discussionmentioning

confidence: 99%

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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%

“…Laser treated 1.9 ± 0.8 12.9 ± 2.7 Figure 6. Curve of fatigue limit (σf) in function of roughness [11].…”

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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“…Figure 12a,b highlight the failure origin from a roughness valley. The substantive effect of the surface roughness on the fatigue strength is well reported in [76][77][78]. The given examples are from the unprocessed AB series.…”

Section: Failure From Surface Featuresmentioning

confidence: 58%

Effect of Post Treatment on the Microstructure, Surface Roughness and Residual Stress Regarding the Fatigue Strength of Selectively Laser Melted AlSi10Mg Structures

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Leitner

Pomberger

et al. 2019

JMMP

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This paper focusses on the effect of hot isostatic pressing (HIP) and a solution annealing post treatment on the fatigue strength of selectively laser melted (SLM) AlSi10Mg structures. The aim of this work is to assess the effect of the unprocessed (as-built) surface and residual stresses, regarding the fatigue behaviour for each condition. The surface roughness of unprocessed specimens is evaluated based on digital light optical microscopy and subsequent three-dimensional image post processing. To holistically characterize contributing factors to the fatigue strength, the axial surface residual stress of all specimens with unprocessed surfaces is measured using X-ray diffraction. Furthermore, the in-depth residual stress distribution of selected samples is analyzed. The fatigue strength is evaluated by tension-compression high-cycle fatigue tests under a load stress ratio of R = −1. For the machined specimens, intrinsic defects like pores or intermetallic phases are identified as the failure origin. Regarding the unprocessed test series, surface features cause the failures that correspond to significantly reduced cyclic material properties of approximately −60% referring to machined ones. There are beneficial effects on the surface roughness and residual stresses evoked due to the post treatments. Considering the aforementioned influencing factors, this study provides a fatigue assessment of the mentioned conditions of the investigated Al-material.

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“…The micrograph in Figure taken from the fatigue crack nucleation region reveals that corrosion pits around 50 μm are formed during the anodizing process at 40 V/6 h and they are responsible for the unsatisfactory fatigue performance. In fact, from the work of da Silva et al, the size of 50 μm represents a very critical value to decrease the fatigue resistance of surface‐modified titanium alloys.…”

Section: Resultsmentioning

confidence: 99%

Fatigue resistance, electrochemical corrosion and biological response of Ti‐15Mo with surface modified by amorphous TiO₂ nanotubes layer

et al. 2018

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The objective of this work was a systemic evaluation of the anodizing treatment in a β-type Ti-15Mo alloy to grow a TiO nanostructured layer for osseointegration improvement. The technical viability of the surface modification was assessed based on the resistance to mechanical fatigue, electrochemical corrosion, and biological response. By using an organic solution of NH F in ethylene glycol, a well-organized array of 90 nm diameter nanotubes was obtained with a potential of 40 V for 6 h, while undefined nanotubes of 25 nm diameter were formed with a potential of 20 V for 1 h. Nevertheless, the production of the 90 nm diameter nanotubes was followed by micrometer pits that significantly reduced the fatigue performance. The undefined nanotubes of 25 nm diameter, besides the greater cell viability and improved osteoblastic cell differentiation in comparison to the as-polished surface, were not deleterious to the fatigue and corrosion properties. This result strengthens the necessity of an overall evaluation of the anodizing treatment, particularly the fatigue resistance, before suggesting it for the design of implants. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2018.

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Prediction of the surface finishing roughness effect on the fatigue resistance of Ti-6Al-4V ELI for implants applications

Cited by 29 publications

References 15 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

Effect of Post Treatment on the Microstructure, Surface Roughness and Residual Stress Regarding the Fatigue Strength of Selectively Laser Melted AlSi10Mg Structures

Fatigue resistance, electrochemical corrosion and biological response of Ti‐15Mo with surface modified by amorphous TiO₂ nanotubes layer

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Prediction of the surface finishing roughness effect on the fatigue resistance of Ti-6Al-4V ELI for implants applications

Cited by 29 publications

References 15 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

Effect of Post Treatment on the Microstructure, Surface Roughness and Residual Stress Regarding the Fatigue Strength of Selectively Laser Melted AlSi10Mg Structures

Fatigue resistance, electrochemical corrosion and biological response of Ti‐15Mo with surface modified by amorphous TiO2 nanotubes layer

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Fatigue resistance, electrochemical corrosion and biological response of Ti‐15Mo with surface modified by amorphous TiO₂ nanotubes layer