Abstract
The performance of fretting corrosion and reliability is an essential need for Al alloy components for modern industrial engineering applications. To improve the weak fretting corrosion resistance of Al alloy components in a corrosive solution, investigations were carried out using laser shock peening (LSP) on the surface of Al 6061-T6 alloy. Then, the influence of LSP on the fretting corrosion behavior of Al6061-T6 alloy against 440C stainless steel in dry, deionized water, rainwater, and seawater conditions was comparatively examined, measuring the surface roughness and microhardness and electrochemical corrosion test. The influence parameters of the normal load (L), sliding speed (SS), and sliding distance (SD) on the fretting corrosion performance of the LSP specimens were also analyzed using the Taguchi method based on the L9 orthogonal array and analysis of variance (ANOVA). Scanning electron microscopy, energy-dispersive spectroscopy, and a microhardness tester were used to image and analyze element contents, the worn surface, and microhardness, respectively. It was proven that LSP effectively improved the surface roughness by 77.01%, microhardness by 30.8%, anti-friction, and anti-wear performances of Al alloys. The friction coefficient generally decreases with increasing load under all test conditions. The synergistic wear mechanism was dominated by mechanical wear, while the chemical wear process increased in seawater. ANOVA result shows that the L and Ss are the fretting corrosion factors that have the strongest physical and statistical influence on the mechanical and corrosion wear processes of the LSP specimens.
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This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (2021R1I1A3059770).
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Dawit Zenebe Segu: conceptualization, methodology, software, validation, formal analysis, investigation, data curation, writing-original draft, writing – review and editing, visualization. Chang-Lae Kim: resources, supervision, project administration. All authors read and approved the final version of the manuscript.
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Segu, D.Z., Kim, CL. Effect of laser shock peening on fretting corrosion behaviors of aluminum alloy in different aqueous environments. Int J Adv Manuf Technol 130, 2269–2281 (2024). https://doi.org/10.1007/s00170-023-12842-8
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DOI: https://doi.org/10.1007/s00170-023-12842-8