Open Access

ARTICLE

Effect of Al₂O₃ Nanoparticle on Cavitation Strengthening of Magnesium Alloys

Lei Liu^*, Chuanhui Huang, Xinghua Lu, Ping Yu, Longhai Li, Huafeng Guo

Xuzhou Institute of Technology, Xuzhou, 221000, China

* Corresponding Author: Lei Liu. Email:

Fluid Dynamics & Materials Processing 2021, 17(2), 501-509. https://doi.org/10.32604/fdmp.2021.015161

Received 26 November 2020; Accepted 01 March 2021; Issue published 02 April 2021

Abstract

In order to study the effect of Al₂O₃ nanoparticles in the cavitation-based strengthening process of magnesium alloys, the impact of a micro-jet generated by bubble collapse has been considered. The strengthening mechanism is based on the transfer of the energy of cavitation due to bubble collapse to Al₂O₃ particles, which then undergo collision with the surface of the sample. The hardness, surface morphology, element content and chemical state of the strengthened samples have been analyzed by microhardness tests, SEM (scanning electron microscopy) and XPS (X-ray photoelectron spectroscopy) techniques. The results show that: after 5 min of strengthening, nanoparticles can be found on the surface of the sample through SEM. Combined with XPS tests, the content of Al₂O₃ in the sample can be significantly increased, indicating that Al₂O₃ particles penetrate into the surface and increase its hardness by 29.1 HV.

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Keywords

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