3D texture parameters for wear scars after severe regime
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 30 December 2021
Issue publication date: 29 March 2022
Abstract
Purpose
This paper aims to present an analysis of several 3 D texture parameters for the entire wear scars obtained in severe regime, on a four-ball tester. The aim of this analysis is to correlate the tribological parameter as wear scar diameter to texture parameters.
Design/methodology/approach
Tested lubricants were rapeseed oil, rapeseed oil additivated with 1% Wt nano TiO2 and rapeseed oil additivated with 1%Wt nano ZnO. The severe regime was applied for 1400 rpm and for loads increasing in steps of 50 N, from 500 to 900 N. Several analyzed roughness parameters (height parameters and functional ones) could be related to the evolution of a wear parameter, the wear scar diameter. Comparing the values for neat rapeseed oil and additivated variants, the texture parameters allow for evaluating if the additives protect or not the worn surfaces.
Findings
Measurements pointed out two groups of roughness parameters: one that has an evolution depending on wear scar diameter (WSD) and load (Sa, St, functional parameters) and one including Ssk that has shown no dependence on load and WSD. Also, the functional parameters Spk and Svk follow in a similar manner the wear parameter, WSD, but Sk is the least dependent on load. For the highest load, amplitude parameters such as Sa and St are following the tendency of WSD. Each lubricant has its particular correlation between wear parameters and texture quality, expressed by the help of a set of roughness parameters.
Research limitations/implications
Such studies help tribologists to rank lubricants based on a combined analysis with wear parameters and texture parameters.
Practical implications
The results allow for evaluating new formulated lubricants.
Originality/value
The study on the quality on worn surfaces introduces the original idea of analyzing the entire wear scar surface (approximated by an ellipse with the axes as those experimentally measured) by the help of a set of 3 D roughness parameters.
Keywords
Acknowledgements
This work is supported by the project ANTREPRENORDOC, in the framework of Human Resources Development Operational Programme 2014–2020, financed from the European Social Fund under the contract number 36355/23.05.2019 HRD OP/380/6/13 – SMIS Code: 123847.
Citation
Deleanu, L., Ionescu, T.F., Cristea, G.C., Suciu, C.C. and Georgescu, C. (2022), "3D texture parameters for wear scars after severe regime", Industrial Lubrication and Tribology, Vol. 74 No. 3, pp. 324-334. https://doi.org/10.1108/ILT-06-2021-0220
Publisher
:Emerald Publishing Limited
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