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Mechanical and Tribology Behaviors of Advanced Composites
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Mechanical and Tribology Behaviors of Advanced Composites

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 10141

Special Issue Editors

Dr. Yefei Li

E-Mail Website
Guest Editor
State Key Laboratory for Mechanical Behaviour of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: development of advanced wear-resistant materials; solidification and iron matrix composites; computer simulation by first-principles calculation; development of ceramic particle dispersed alloys
Dr. Yiran Wang

E-Mail Website
Guest Editor
School of Material Science and Engineering, Xi’an Jiao Tong University, Xi'an, China
Interests: tribology and wear behavior of metals and metal matrix composites; processing engineering of advanced composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Tribology, wear, and corrosion cause large economic loss in a variety of areas today, such as the metallurgy, automobile, energy, and chemical industries. Metal matrix composites have the advantages of high specific strength and specific stiffness, good heat resistance, and wear resistance, and they are urgently needed in the fields of aerospace and critical equipment. The manufacturing industry in particular requires suitable service performance and scale application of metal matrix composites.

There are many factors to affect metal matrix composites (e.g., reinforcements, matrix, interface). However, in the face of severe service requirements, fundamental research of metal matrix composites is not systematic or in-depth. It is widely recognized that important macroscopic properties, i.e., hardness, strength, corrosion, and wear resistance, are influenced by the microstructures and fabrication details of the composites. The aim of this Special Issue is to understand the basic principles of the mechanical and tribology behaviors of composites.

It is our pleasure to invite you to submit your article to this Special Issue. We look forward to receiving your paper for this Special Issue of Materials on “Mechanical and Tribology Behaviors of Advanced Composites”.

Dr. Yefei Li
Dr. Yiran Wang
Guest Editors

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. Materials is an international peer-reviewed open access semimonthly 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

  • metal matrix composites
  • wear
  • tribology
  • corrosion
  • interface

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Published Papers (3 papers)

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Research

18 pages, 6910 KiB  
Article
Study on the Influence of Friction and Wear Properties of High-Speed Rail Brake Materials under Humidity Environment and Temperature Conditions
by Siyuan Ding, Meixian Zhang, Yiding Ou and Lei Ma
Materials 2023, 16(4), 1610; https://doi.org/10.3390/ma16041610 - 15 Feb 2023
Cited by 11 | Viewed by 2475
Abstract
A multi-functional friction and wear testing machine was used to test the pin disk wear of high-speed railway brake friction material under different disk temperatures (20 °C, 100 °C, and 200 °C) and different ambient humidities (55%, 95%). The test results show that [...] Read more.
A multi-functional friction and wear testing machine was used to test the pin disk wear of high-speed railway brake friction material under different disk temperatures (20 °C, 100 °C, and 200 °C) and different ambient humidities (55%, 95%). The test results show that the change in the disk temperature and different ambient humidities have significant effects on the frictional wear performance of the high-speed railway brake material. Under the conditions of 20 °C, 100 °C and 200 °C, the instantaneous friction coefficient and wear rate of the brake material decreased as the ambient humidity increased. The different ambient humidity caused severe surface damage to the brake materials, but the damage mechanisms were dramatically different. At constant temperature, the higher the ambient humidity, the lower the maximum equilibrium temperature of the disc. Full article
(This article belongs to the Special Issue Mechanical and Tribology Behaviors of Advanced Composites)
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14 pages, 6253 KiB  
Article
Optimization of Thermo-Mechanical Fatigue Life for Eutectic Al–Si Alloy by the Ultrasonic Melt Treatment
by Meng Wang, Jianchao Pang, Xinfeng Liu, Jianqiu Wang, Yongquan Liu, Shouxin Li and Zhefeng Zhang
Materials 2022, 15(20), 7113; https://doi.org/10.3390/ma15207113 - 13 Oct 2022
Cited by 6 | Viewed by 1789
Abstract
The eutectic cast Al–Si alloys with excellent high-temperature and casting performance are widely used in engine pistons. During frequent starts and stops, the thermo-mechanical fatigue (TMF) is the most important failure cause. Ultrasonic melt treatment (UT) was chosen to compare and investigate the [...] Read more.
The eutectic cast Al–Si alloys with excellent high-temperature and casting performance are widely used in engine pistons. During frequent starts and stops, the thermo-mechanical fatigue (TMF) is the most important failure cause. Ultrasonic melt treatment (UT) was chosen to compare and investigate the influence of micro-structures on fatigue life and damage mechanisms of as-cast (AC) eutectic Al–Si alloys under TMF loading. After UT, the grain size, primary Si, and intermetallic particles are reduced significantly in the alloy; fatigue life increases obviously. As a result of pilling-up of dislocations, the competitive effects of the critical strain/stress for fatigue crack nucleation can be found. There are two different crack initiation mechanisms under TMF: one is primary Si fracture for AC alloys with limited critical strain/stress for fatigue crack nucleation at fractured Si particles, and the other is primary Si debonding for UT alloys with increasing critical fracture strain/stress. After the crack initiation, the fractured or debonded primary phases provide the advantages for the further development of main cracks for both alloys. The UT alloy (805 ± 253 cycles) has about twice the TMF life of the AC alloy (403 ± 98 cycles). The refinement of micro-structures is instrumental in improving the fatigue resistance and life of TMF for the UT alloy. Full article
(This article belongs to the Special Issue Mechanical and Tribology Behaviors of Advanced Composites)
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19 pages, 5314 KiB  
Article
First Principles Investigation of Binary Chromium Carbides Cr7C3, Cr3C2 and Cr23C6: Electronic Structures, Mechanical Properties and Thermodynamic Properties under Pressure
by Liang Sun, Xiongshuai Ji, Liang Zhao, Wenyan Zhai, Liujie Xu, Hui Dong, Yanmin Liu and Jianhong Peng
Materials 2022, 15(2), 558; https://doi.org/10.3390/ma15020558 - 12 Jan 2022
Cited by 37 | Viewed by 4681
Abstract
Binary chromium carbides display excellent wear resistance, extreme stiffness and oxidation resistance under high temperature. The influence of applied pressure on electronic structure, elastic behavior, Debye temperature and hardness of Cr7C3, Cr3C2 and Cr23C [...] Read more.
Binary chromium carbides display excellent wear resistance, extreme stiffness and oxidation resistance under high temperature. The influence of applied pressure on electronic structure, elastic behavior, Debye temperature and hardness of Cr7C3, Cr3C2 and Cr23C6 have been investigated by the density functional theory (DFT) method. The results reveal that lattice parameters and formation enthalpy display an inverse relationship with applied pressure, and Cr3C2 exhibited optimal structural stability. Moreover, Cr-C orbital hybridization tends to be stronger due to the decreased partial density of states (PDOS) of the Cr atom. The difference in electronic distribution of binary carbides has also been investigated, which confirmed that overall orbital hybridization and covalent characteristics has been enhanced. The theoretical hardness was elevated according to the higher bond strength and bond density. In accordance with structural stability data, Cr3C2 has shown maximum theoretical hardness. Furthermore, the anisotropic nature of hardness has been evaluated with external pressure. Cr3C2, and the highest isotropic hardness behavior along with an increase in hardness values with increasing pressure has been observed. In addition, the variation in Debye temperatures of binary chromium carbides under applied pressure has also been predicted. The results provide a theoretical insight into electronic, mechanical and thermodynamic behavior of three binary chromium carbides and show the potential of these novel carbides in a wide range of applications. Full article
(This article belongs to the Special Issue Mechanical and Tribology Behaviors of Advanced Composites)
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