Submicron-scale experimental analyses of multi-asperity contacts with different roughnesses

Zugelj, B. Brodnik; Kalin, Mitjan

doi:10.1016/j.triboint.2017.06.036

Cited by 23 publications

(17 citation statements)

References 25 publications

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“…This seems to be a good assumption in the boundary lubrication regime. Similar results were also reported by Zugelj et al [36] were they experimentally showed a linear increase of the real area of contact with the applied load.…”

Section: Effect Of Load On Synergistic Effectssupporting

confidence: 91%

“…Journal the results of a recent experimental-analytical work [36] which reports a similar pattern in the real area of contact measured experimentally using a new set-up. It is also clear that the higher applied load results in the faster increase in the corrosive wear which can be attributed to the faster modification of the surface topography and the real area of contact.…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dsupporting

confidence: 61%

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A New Asperity-Scale Mechanistic Model of Tribocorrosive Wear: Synergistic Effects of Mechanical Wear and Corrosion

Ghanbarzadeh

Salehi

Bryant

et al. 2018

Journal of Tribology

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A corrosive wear model is considered at the asperity-scale of a tribocorrosive wear system as well as the traditional Archard-type mechanical wear model. The geometry of the surface asperities is modified in a contact mechanics model with respect to both corrosive and mechanical wear calculations. This model was presented and validated for prediction of the electrochemistry in the first part of this work. The material used in the experimental part of this work was CoCrMo plate working electrode (WE) and Si3N4 ball as the counter body in a reciprocating configuration. Experiments were conducted at loads of 5, 7.5, and 10 N and the contributions of total mechanical wear and corrosion were measured. The model is then tuned to predict the chemical and mechanical components of the total wear of the system. The synergistic effect of corrosion on mechanical wear and mechanical wear on corrosion are modeled numerically in this work. The values are then used to explain different components of mechanistic tribocorrosive wear models present in the literature. This deterministic model, for the first time, calculates the corrosion-enhanced wear in a tribocorrosive wear environment and proposes that changes in the topography are responsible for this synergistic effect. The results show a linear dependence of the corrosion enhanced wear, wear-enhanced corrosion, and the pure mechanical wear on the applied load. Results also suggest that the wear enhanced corrosion has a significant contribution in the overall degradation of the material.

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Section: Effect Of Load On Synergistic Effectssupporting

confidence: 91%

Section: Accepted Manuscript N O T C O P Y E D I T E Dsupporting

confidence: 61%

A New Asperity-Scale Mechanistic Model of Tribocorrosive Wear: Synergistic Effects of Mechanical Wear and Corrosion

Ghanbarzadeh

Salehi

Bryant

et al. 2018

Journal of Tribology

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“…They used an interferometer to experimentally capture the real area of contact and compared the results with analytical contact mechanics models. The proposed trend in Ref [51] is in agreement with the findings of the current papers and the fact that the real area of contact increases linearly with the applied load. Figure 15 The effect of mechanical wear on the electrochemical wear (simulation results)…”

Section: Effect Of Mechanical Wear On Corrosionsupporting

confidence: 89%

“…It shows that the increase in the mechanical wear rate, not only increases the mechanical wear, but also increases the corrosive wear. The increase in the real area of contact with the load has been presented in a recent work by Zugelj et al [51]. They used an interferometer to experimentally capture the real area of contact and compared the results with analytical contact mechanics models.…”

Section: Effect Of Mechanical Wear On Corrosionmentioning

confidence: 97%

Modelling the evolution of electrochemical current in potentiostatic condition using an asperity-scale model of tribocorrosion

et al. 2019

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“…Therefore, the results calculated by this model are compared with those from the KE model and the test results to verify the correctness of the proposed model. The microscopic parameters of three experimental surfaces provided by Zugelj et al 26 are shown in Table 2, and the experimental material parameters are shown in Table 3.…”

Section: Comparison Of the Experimental Resultsmentioning

confidence: 99%

A new elliptical microcontact model considering elastoplastic deformation

Yan

Tang

Zhou

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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A new elliptical microcontact model considering elastoplastic deformation is proposed to overcome the shortcomings of the existing elastoplastic microcontact model. A new low-order interpolation function is used to describe the relationship between the normal deformation of asperity and the mean contact pressure in the elastoplastic deformation stage, and a smooth, continuous, monotonic change curve of the mean contact pressure is obtained. Then, the contact of rough surfaces is studied based on the new elastoplastic elliptical microcontact model and the height distribution of asperity. The calculated results are compared with those obtained from the existing rough surface contact models and the comparisons show that: (1) the change curve for the average contact pressure in the new model is smooth, continuous, and monotonic; (2) the calculation results of the new model are consistent with the numerical results based on the finite element method; (3) the new model is helpful to study the rough surface contact analysis of the elliptical microconvex body.

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Submicron-scale experimental analyses of multi-asperity contacts with different roughnesses

Cited by 23 publications

References 25 publications

A New Asperity-Scale Mechanistic Model of Tribocorrosive Wear: Synergistic Effects of Mechanical Wear and Corrosion

A New Asperity-Scale Mechanistic Model of Tribocorrosive Wear: Synergistic Effects of Mechanical Wear and Corrosion

Modelling the evolution of electrochemical current in potentiostatic condition using an asperity-scale model of tribocorrosion

A new elliptical microcontact model considering elastoplastic deformation

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