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Tribological and Mechanical Characteristics of Aluminum Metal Matrix Composites and...
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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 1086

Special Issue Editor

Prof. Dr. Blaza Stojanovic

E-Mail Website
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

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

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

Published Papers (2 papers)

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Research

17 pages, 8341 KiB  
Article
Synergistic Effect of B4C and Multi-Walled CNT on Enhancing the Tribological Performance of Aluminum A383 Hybrid Composites
by Priyaranjan Samal, Himanshu Raj, Arabinda Meher, B. Surekha, Pandu R. Vundavilli and Priyaranjan Sharma
Lubricants 2024, 12(6), 213; https://doi.org/10.3390/lubricants12060213 - 11 Jun 2024
Viewed by 314
Abstract
The requirement for high-performance and energy-saving materials motivated the researchers to develop novel composite materials. This investigation focuses on utilizing aluminum alloy (A383) as the matrix material to produce hybrid metal matrix composites (HMMCs) incorporating boron carbide (B4C) and multi-walled carbon [...] Read more.
The requirement for high-performance and energy-saving materials motivated the researchers to develop novel composite materials. This investigation focuses on utilizing aluminum alloy (A383) as the matrix material to produce hybrid metal matrix composites (HMMCs) incorporating boron carbide (B4C) and multi-walled carbon nanotube (MWCNT) through a cost-effective stir casting technique. The synthesis of HMMCs involved varying the weight fractions of B4C (2%, 4%, and 6%) and MWCNT (0.5%, 1%, and 1.5%). The metallographic study was carried out by field emission scanning electron microscopy (FESEM) mapped with EDS analysis. The results indicated a uniform dispersion and robust interfacial interaction between aluminum and the reinforced particles, significantly enhancing the mechanical properties. Micro-hardness and wear characteristics of the fabricated HMMCs were investigated using Vickers microhardness testing and the pin-on-disc tribometer setup. The disc is made of hardened chromium alloy EN 31 steel of hardness 62 HRC. The applied load was varied as 10N, 20N, 30N with a constant sliding speed of 1.5 m/s for different sliding distances. The micro-hardness value of composites reinforced with 1.5 wt% MWCNT and 6 wt% B4C improved by 61% compared to the base alloy. Additionally, the wear resistance of the composite material improved with increasing reinforcement content. Incorporating 1.5% CNT and 6% B4C as reinforcements results in the composite experiencing about a 40% reduction in wear loss compared to the unreinforced aluminum alloy matrix. Furthermore, the volumetric wear loss of the HMMCs was critically analyzed with respect to different applied loads and sliding distances. This research underscores the positive impact of varying the reinforcement content on the mechanical and wear properties of aluminum alloy-based hybrid metal matrix composites. Full article
(This article belongs to the Special Issue Tribological and Mechanical Characteristics of Aluminum Metal Matrix Composites and Their Applications)
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0 pages, 4684 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 516
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
(This article belongs to the Special Issue Tribological and Mechanical Characteristics of Aluminum Metal Matrix Composites and Their Applications)
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