Tribological and Mechanical Characteristics of Aluminum Metal Matrix Composites and Their Applications

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: 30 November 2024 | Viewed by 508

Special Issue Editor


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Guest Editor
Faculty of Engineering, University of Kragujevac, 34000 Kragujevac, Serbia
Interests: composites; mechanical engineering; surface engineering; materials; advanced materials; failure analysis; mechanical properties; mechanical behavior of materials; material characterization; nanocomposites

Special Issue Information

Dear Colleagues,

The enhancement of construction requirements (by increasing the working life and reducing the mass, and therefore the price, of the product) has initiated the development and application of new materials. The increased use of composite materials (composites) can be primarily attributed to their physical–mechanical and tribological properties, which are better compared to the properties of the base material.

Thanks to its good characteristics, such as lower density, good thermal conductivity and corrosion resistance, relatively low production cost, and good recyclability, aluminum and its alloys are most often used as the basis of composites. The tribological and mechanical characteristics of aluminum composites are improved by adding appropriate reinforcements and modifiers.

Aluminum-based composites are used as substitutes for standard materials, cast iron, and gray cast iron. They have been increasingly applied in the aviation, automotive, space, electronic, and military industries. With an annual production growth rate of 6%, metal matrix composites represent very interesting and promising materials. Thanks to increased production and high recyclability (˃90%), the price of materials has been reduced and their potential areas of application have increased. Recent trends in the development of new materials are reflected in the development, testing, and application of composites with an aluminum base. The enhancement of construction requirements (by increasing the working life and reducing the mass, and therefore the price, of the product) has initiated the development and application of new materials. The increased use of composite materials (composites) can primarily be attributed to their physical–mechanical and tribological properties, which are better than the properties of the base material.

Prof. Dr. Blaza Stojanovic
Guest Editor

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Keywords

  • tribological characteristics
  • mechanical characteristics
  • aluminum
  • metal matrix composites
  • application

Published Papers (1 paper)

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18 pages, 4683 KiB  
Article
Multi-Objective Optimization of Tribological Characteristics for Aluminum Composite Using Taguchi Grey and TOPSIS Approaches
by Sandra Gajević, Ana Marković, Saša Milojević, Aleksandar Ašonja, Lozica Ivanović and Blaža Stojanović
Lubricants 2024, 12(5), 171; https://doi.org/10.3390/lubricants12050171 - 10 May 2024
Viewed by 324
Abstract
In this study, a multi-objective optimization regarding the tribological characteristics of the hybrid composite with a base material of aluminum alloy A356 as a constituent, reinforced with a 10 wt.% of silicon carbide (SiC), size 39 µm, and 1, 3, and 5 wt.% [...] Read more.
In this study, a multi-objective optimization regarding the tribological characteristics of the hybrid composite with a base material of aluminum alloy A356 as a constituent, reinforced with a 10 wt.% of silicon carbide (SiC), size 39 µm, and 1, 3, and 5 wt.% graphite (Gr), size 35 µm, was performed using the Taguchi method, gray relational analysis (GRA), and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) decision-making methods. Tribological tests were carried out on a “block on disc” type tribometer with lubrication. Load, sliding speed, and graphite mass concentration were analyzed as input parameters. As output parameters, wear rate and coefficient of friction were calculated. An analysis of variance (ANOVA) was conducted to identify all parameters that have a significant influence on the output multi-response. It was found that the normal load has the highest influence of 41.86%, followed by sliding speed at 32.48% and graphite addition at 18.47%, on the tribological characteristics of composites. Multi-objective optimization determined that the minimal wear rate and coefficient of friction are obtained when the load is 40 N, the sliding speed is 1 m/s, and the composite contains 3 wt.% Gr. The optimal combination of parameters achieved by GRA was also confirmed by the TOPSIS method, which indicates that both methods can be used with high reliability to optimize the tribological characteristics. The analysis of worn surfaces using scanning electron microscopy revealed adhesive and delamination wear as dominant mechanisms. Full article
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