Study of tribological properties of bulk nanostructured aluminum and copper samples applicable in automotive bearing application
Eskandarzade, Mehdi and Masalehdan, Tahereh and Tutunchi, Abolfazl and Osouli-Bostanabad, Karim and Hildyard, Robin and Bewsher, Stephen Rickie and Mohammadpour, Mahdi (2023) Study of tribological properties of bulk nanostructured aluminum and copper samples applicable in automotive bearing application. Journal of Materials Engineering and Performance, 32 (19). pp. 8807-8817. ISSN 1059-9495 (https://doi.org/10.1007/s11665-023-07835-3)
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Abstract
Using lightweight systems and friction reduction approaches are two main contributors towards modern and efficient powertrains in the automotive industry. New materials and processes are required to achieve the demanding and ever-increasing performance requirement of automotive systems. Nanostructure induced by severe plastic deformation methods involves bimodal microstructures and hence, shows exceptional mechanical characteristics which can be exploited for automotive application. Through this study, samples were prepared using pure copper, aluminum alloy (series 7000) and were processed to attain bulk nanostructured samples using a Single Step High Pressure Torsion technique with appropriate dimensions applicable as the rolling elements of automotive bearings. The induced nanostructures resulted micro hardness and frictional characteristics of the bulk samples were assessed using transmission electron (TEM) and atomic force (AFM) microscopies as well as microhardness evaluations. The results revealed that a fully refined nanostructured samples were achieved with 90% increase in the hardness at the outer diameter of the sample. The AFM measurements indicated that the friction coefficient of nanostructured copper and aluminum samples were ~ 25 and ~ 45% less than that of both the unprocessed samples, respectively. Characteristics of treated samples suggest that these processes can be potentially used in demanding conditions of rolling element bearings with reduced weight and frictional losses.
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Item type: Article ID code: 83664 Dates: DateEvent31 October 2023Published1 February 2023Published Online31 December 2022AcceptedSubjects: Technology > Mechanical engineering and machinery Department: Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences Depositing user: Pure Administrator Date deposited: 10 Jan 2023 15:10 Last modified: 06 Aug 2024 01:47 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/83664