Uncertainty evaluation of small wear measurements on complex technological surfaces by machine vision-aided topographical methods

Genta, Gianfranco; Maculotti, Giacomo

doi:10.1016/j.cirp.2021.04.057

Cited by 20 publications

(8 citation statements)

References 12 publications

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“…Similar standard deviations were evaluated for optical post measurements by Li et al for comparable wear volumes [37]. The uncertainties due to systematic errors of optical methods [38]- [41] are not regarded within the uncertainty values.…”

Section: Impact Of Irradiation On Tribological Behavior Of Dlc Coatingsmentioning

confidence: 66%

Evaluation of Wear Measurement With Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Zellhofer

Jech

Badisch

et al. 2022

Preprint

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Diamon-like carbon (DLC) coatings protect engine parts from wear and provide low-friction. Unfortunately, the nature of DLC coatings does not allow progressing wear measurement using conventional methods. Therefore, we applied a radioactive isotope-based wear measurement method (RIC method). A tribometer with oscillating contact and one with sliding contact were used to provide different loading conditions. The RIC method was evaluated for DLC coatings, and the DLC wear was investigated regarding the presence of abrasive particles. The results indicate that an increase in abrasive particle concentration leads to an increase of DLC wear rate and a decrease in usage-time until wear-off.

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Section: Impact Of Irradiation On Tribological Behavior Of Dlc Coatingsmentioning

confidence: 66%

Evaluation of Wear Measurement With Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Zellhofer

Jech

Badisch

et al. 2022

Preprint

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show abstract

“…According to Maculotti et al 104 using gravimetric and topographical methods for wear characterisation have a lack of precision and accuracy of data, while the topographical methods has a better characterization of wear when it comes to pin-on-disc. Genta and Maculotti 105 have developed a framework model for analysing the measurement uncertainty of methods for measuring small wear volume, which may be the case with a single braking of the vehicle. For the analysis of the influence of different parameters on wear behaviour, it is possible to apply the statistical methods.…”

Section: Brake Disc Coating Deposition Techniques and Applied Materialsmentioning

confidence: 99%

Review of the coatings used for brake discs regarding their wear resistance and environmental effect

Vasiljević

Glišović

Stojаnović

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Wear of a friction pair of brake (brake disc and pads), in addition to reducing the active safety of vehicles, leads to the formation of particles that can affect the environment and human health. In addition to the technologies that are being developed for the collection of particles created by the wear of brakes during braking process, today new materials are being introduced, as well as various technologies for processing friction pairs with the aim of reducing brake wear and thus the formation of particles. Furthermore, today, technologies for coating (cladding) the friction surfaces of disc brakes with some materials are increasingly applied and researched, in order to reduce the wear intensity (wear rate) of disc brakes, i.e. the emission of particles created by wear of friction pairs. The aim of this paper is to analyse and review different deposition techniques and materials used for brake discs coatings, as well as the effect it has on the wear rate of friction pair. There are many coating deposition techniques, and special attention is paid to the technology of laser hardfacing of brake rotors.

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“…However, these methods may be complex, as they require non-trivial segmentation, mostly based on machine vision [ 80 ] to identify the geometries.…”

Section: Introductionmentioning

confidence: 99%

Metrological Comparison of Available Methods to Correct Edge-Effect Local Plasticity in Instrumented Indentation Test

et al. 2023

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The Instrumented Indentation Test (IIT) mechanically characterizes materials from the nano to the macro scale, enabling the evaluation of microstructure and ultra-thin coatings. IIT is a non-conventional technique applied in strategic sectors, e.g., automotive, aerospace and physics, to foster the development of innovative materials and manufacturing processes. However, material plasticity at the indentation edge biases the characterization results. Correcting such effects is extremely challenging, and several methods have been proposed in the literature. However, comparisons of these available methods are rare, often limited in scope, and neglect metrological performance of the different methods. After reviewing the main available methods, this work innovatively proposes a performance comparison within a metrological framework currently missing in the literature. The proposed framework for performance comparison is applied to some available methods, i.e., work-based, topographical measurement of the indentation to evaluate the area and the volume of the pile-up, Nix–Gao model and the electrical contact resistance (ECR) approach. The accuracy and measurement uncertainty of the correction methods is compared considering calibrated reference materials to establish traceability of the comparison. Results, also discussed in light of the practical convenience of the methods, show that the most accurate method is the Nix–Gao approach (accuracy of 0.28 GPa, expanded uncertainty of 0.57 GPa), while the most precise is the ECR (accuracy of 0.33 GPa, expanded uncertainty of 0.37 GPa), which also allows for in-line and real-time corrections.

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Uncertainty evaluation of small wear measurements on complex technological surfaces by machine vision-aided topographical methods

Cited by 20 publications

References 12 publications

Evaluation of Wear Measurement With Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Evaluation of Wear Measurement With Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Review of the coatings used for brake discs regarding their wear resistance and environmental effect

Metrological Comparison of Available Methods to Correct Edge-Effect Local Plasticity in Instrumented Indentation Test

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