Finite element based simulation of tribocorrosion at the head-neck junction of hip implants

Fallahnezhad, Khosro; Feyzi, Mohsen; Ghadirinejad, Khashayar; Hashemi, Reza; Taylor, Mark

doi:10.1016/j.triboint.2021.107284

Cited by 22 publications

(31 citation statements)

References 69 publications

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“…Rubbing passivation current due to the potential evolution in the OCP condition (so-called as "cathodic excursion") has been reported in the literature [35,45]. The level of cathodic excursion in an industrial problem (and even in ball-on-disk configurations [29]) depends on various parameters such as the applied loading (magnitudes and directions), material combinations in contact, contact geometry, and the solution type and its pH [32]. Therefore, the cathodic excursion needs to be measured in a series of separate application-oriented experiments.…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, one cannot theoretically extract the tribological constants which can then be embedded into the tribocorrosion models. These models together with their constants can then be used for predicting the tribocorrosion behaviour and material loss in a nonlinear industrial problem with simulation procedures (whether this nonlinearity is inherited by the geometry, material, and applied loads) [32]. Considering both the extensive use of Ti-6Al-4 V in various industrial sectors and also the costs and risks associated with its tribocorrosion failure, a set of integrated data (under various potentials and normal forces) is essentially required to determine the necessary constants for tribocorrosion models which can be beneficially used in various applications.…”

Section: Introductionmentioning

confidence: 99%

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The Tribocorrosion Behaviour of Ti-6Al-4 V Alloy: The Role of Both Normal Force and Electrochemical Potential

et al. 2022

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The tribocorrosion behaviour of Ti-6Al-4 V exposed to phosphate buffered saline was investigated under a range of normal forces in both cathodic and anodic regions to provide a basis for properly deriving the tribological constants of this alloy. To achieve this, a new customised tribotester was designed and manufactured to rub the Ti-6Al-4 V disks against zirconia balls. The tests were conducted at a sliding frequency of 1 Hz and a sliding distance of 4.8 mm under various normal forces and potentials as 17.5, 10.8, 6, 3.5 N, and − 1.2, − 0.6, 0, 0.4, 0.8 V/VAg/AgCl, respectively. The damaged surfaces were characterised by scanning electron microscopy and energy-dispersive X-ray spectroscopy, profilometer, and micro-hardness tester. The post analyses confirmed the appearance of some minor cracks together with third-body wear particles. No significant changes in the hardness were detected after the tribocorrosion tests. The results of profilometry and electrochemical current indicated that in the anodic region the chemical losses accounted for a significant proportion (up to 36%) of the total loss. The proportional chemical loss increased with the potential; however, neither direct nor reverse relationship was found with the normal force. Overall, in the anodic domain, the material loss increased with the potential level due to the formation of oxide layer which may induce more shear cutting. In the cathodic domain, hydrogen embrittlement changed the properties of the interface and thus, the amount of material loss. Both the mechanical and chemical wear were described by an existing tribocorrosion theory; thereby, the theory was equipped with its tribocorrosive constants for future analyses on the tribocorrosion of this alloy extensively used in various applications including biomedical implants.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Tribocorrosion Behaviour of Ti-6Al-4 V Alloy: The Role of Both Normal Force and Electrochemical Potential

et al. 2022

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“…The details of the tribocorrosion model and steps in prediction of the volume loss are given in the authors' previous work (Fallahnezhad et al 2022). In an experimental study, Maldonado et .2) to estimate the tribocorrosion material loss in a ball-on-disc con guration.…”

Section: Fe Tribocorrosion Modelmentioning

confidence: 99%

“…Recently, the authors have developed a nite element model to simulate the tribocorrosion process to predict material loss due to the both mechanical fretting wear and passivation (Fallahnezhad et al 2022;Fallahnezhad et al 2018b). The model used a combination of Landolt's passive lm equation (Landolt et al 2001) together with Archard's wear law and was successfully validated by existing experimental tests (Fallahnezhad et al 2022). This provided a foundation for further analysis on the in uential parameters in hip replacements surgeries.…”

Section: Introductionmentioning

confidence: 99%

“…To date, no predictive study has been carried out to investigate the in uence of the assembly force on the tribocorrosive behaviour of the head-neck junction of the hip implant, considering both the mechanical (substrate removal) and chemical (oxide removal) material losses. In this work, the developed tribocorrosion algorithm (Fallahnezhad et al 2022) is employed and used to investigate the in uence of assembly force on the tribocorrosiove behaviour of a CoCr/CoCr head/neck junction.…”

Section: Introductionmentioning

confidence: 99%

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The role of the assembly force in the tribocorrosion behaviour of hip implant head-neck junctions: An adaptive finite element approach

Fallahnezhad

Feyzi

Hashemi

et al. 2022

Preprint

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The cyclic loading, in the corrosive medium of the human body, results in tribocorrosion, at the interface of the head neck taper junction of hip implants. The resulting metal ions and wear debris can have adverse effects on the local tissues. The force applied by surgeons to assemble the head-neck junction is proven to play a major role in the mechanics of the taper junction which in turn can influence the tribocorrosion damage. Recently, finite element method has been used to predict the material loss at the head-neck interface. However, in most previous finite element studies, the contribution of electrochemical corrosion has been ignored. Therefore, a detailed study to investigate the influence of the assembly force on the tribocorrosive behaviour of the head-neck junction, taking into account both the mechanical and chemical material removal, is of paramount interest. In this study, a finite-element-based algorithm was used to investigate the effect of assembly force on the tribocorrosion damage at the junction interface over 4 million cycles of simulated level gait. The patterns of the material removal in the modelling results were compared with the damage patterns observed in a group of retrieved modular hip implants. The results of this study showed that chemical wear, after four million cycles, for different cases, was in the range of 25%-32% of the total material loss. A minimum assembly force (4 kN for the studied cases) is needed to maintain the interlock in the junction. Increasing the assembly force above this value does not further reduce the material loss. The computational model was able to predict the damage pattern at the retrieved head-neck interface.

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Advancements in Modelling the Tribocorrosion Current

Feyzi,

Stack,

Hashemi

2024

ChemElectroChem

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Tribocorrosion in passive metals involves a complex and interactive mechanism between mechanical and electrochemical actions at a rubbing contact in a corrosive environment. The mechanical wear mechanism disrupts the passive film on the metal surface; and instantly, the metal repassivates and dissolves in the corrosive environment. This surface damage failure can occur in various components such as marine structures and medical implants which can force significant downtime and repair costs. In this article, historical advancement in the well‐known theories and models which have been developed for passivation and tribocorrosion current (as a measure for wear‐accelerated corrosion) is presented and discussed. The strengths and limitations associated with the models are reviewed to generate an overall picture of the progress in the field. The links between different models are also discussed and finally, some possible directions for future research are suggested.

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Finite element based simulation of tribocorrosion at the head-neck junction of hip implants

Cited by 22 publications

References 69 publications

The Tribocorrosion Behaviour of Ti-6Al-4 V Alloy: The Role of Both Normal Force and Electrochemical Potential

The Tribocorrosion Behaviour of Ti-6Al-4 V Alloy: The Role of Both Normal Force and Electrochemical Potential

The role of the assembly force in the tribocorrosion behaviour of hip implant head-neck junctions: An adaptive finite element approach

Advancements in Modelling the Tribocorrosion Current

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