Tribological behaviour of recursive friction stir processed AA7075
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 25 March 2020
Issue publication date: 25 March 2020
Abstract
Purpose
This study aims to investigate and present the tribological behaviour of recursively friction stir processed 7075 aluminium alloy.
Design/methodology/approach
In this work, aluminium 7075 alloy is friction stir processed recursively by varying the tool rotational speed, traverse speed and the number of passes. Wear pins for testing were extracted from the processed zone and the surfaces were prepared. Wear tests were conducted as per the standard on a pin-on-disc wear testing machine at constant testing conditions and the corresponding tribological properties were analysed. The worn surface and the debris were analysed using a field-emission scanning electron microscope with energy dispersive spectroscopy analysis and elemental mapping to identify the mode of wear mechanism.
Findings
The experimental results indicate that the specimen fabricated at 1,150 rpm of tool rotation speed and 60 mm/min of traverse speed with 4 passes had the highest wear resistance and the minimum friction coefficient.
Originality/value
This paper details the effect of recursive friction stir processing on the surface of AA 7075 to improve the tribological properties.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0070/
Keywords
Acknowledgements
Authors are thankful to the well-wisher(s) who have helped in fabricating the material.
Citation
G., G. and V., A. (2020), "Tribological behaviour of recursive friction stir processed AA7075", Industrial Lubrication and Tribology, Vol. 72 No. 7, pp. 887-894. https://doi.org/10.1108/ILT-02-2020-0070
Publisher
:Emerald Publishing Limited
Copyright © 2020, Emerald Publishing Limited