Exceptional strength and wear resistance in an AA7075/TiB2 composite fabricated via friction consolidation

Li, Xiao; Das, Hrishikesh; Pole, Mayur; Li, Lei; Soulami, Ayoub; Grant, Glenn J.; Herling, Darrell R.; Efe, Mert

doi:10.1016/j.matdes.2024.113006

Cited by 4 publications

(1 citation statement)

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“…Good corrosion resistance, high thermal conductivity, and an adequate strength-to-weight ratio have made aluminum alloys very popular structural materials. Yet, their tribological applications have been restricted by their relatively poor wear resistance, such as in bearings, gears, and sliding components [6]. Therefore the use of ceramic particles, such as aluminum oxide (Al 2 O 3 ) and silicon carbide (SiC), as reinforcements to form aluminum matrix composites has been studied [7,8].…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Processed AA5754-Al2O3 Nanocomposite: A Study on Tribological Characteristics

Rohim,

Abdullah,

Mohammed

et al. 2024

J. Compos. Sci.

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This study investigates the tribological properties of an AA 5754 aluminum alloy composite reinforced with the nanopowder of Al2O3, fabricated using the friction stir processing (FSP) technique with blind holes. The aim is to analyze the effects of varying the tool rotational speed (rpm) and blind hole diameter on the wear and friction behavior of the produced composite. A pin-on disk test is conducted under dry conditions and room temperature to assess the tribological properties against steel. Scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS) is employed to examine the worn and wear surfaces of the produced composites post test. The results indicate that increasing the applied load results in a decrease in the coefficient of friction (COF), with values ranging from 0.775 to 0.852 for 10 N and 0.607 to 0.652 for 20 N. Moreover, the wear rate diminishes with higher Al2O3 content and optimal FSP tool rotation (1280 rpm). Hardness analysis reveals variations between 33–42 HV and 35–39 HV, influenced by nanoparticle distribution. The composite demonstrates superior wear resistance compared to raw AA5754 aluminum due to its reinforced nature. However, high FSP tool rotation rates lead to abrasive wear and surface cracks. These findings offer insights into optimizing FSP parameters to enhance the tribological performance of nano-reinforced aluminum alloys.

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Section: Introductionmentioning

confidence: 99%