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Coatings
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Friction and Friction-Based Techniques
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Friction and Friction-Based Techniques

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Tribology".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 3680

Special Issue Editors

Dr. Yuming Xie

E-Mail Website
Guest Editor
State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, China
Interests: friction stir welding; friction stir additive manufacturing; deformation-driven metallurgy
Special Issues, Collections and Topics in MDPI journals
Dr. Xiangchen Meng

E-Mail Website
Guest Editor
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Interests: friction-based welding; wear; mechanical properties; aluminum alloys; magnesium alloys; polymers; polymer matrix composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, continuous efforts have been made to develop materials with better mechanical and wear performances. However, the performance of such materials under the guidance of classic metallurgical theory is approaching its theoretical limit. Therefore, a ground-breaking strategy that can impart extraordinary characteristics into metallic or polymeric materials needs to be devised. Friction-based techniques, including friction stir welding and processing, deformation-driven metallurgy, friction stir additive manufacturing, etc., based on the principle of severe plastic deformation, have shown great potential in exploiting the intrinsic potential of such materials. Greatly refined microstructures and the corresponding homogeneous dispersion of those second phases induced by friction-driven plastic deformation ensure the superior performances of such materials compared to conventional processing techniques. As such, we encourage the submission of relevant studies which reveal the formation mechanisms and explore the applications of these friction-based techniques towards next-generation materials.

The topics of interest in this Special Issue include, but are not limited to, the following:

  • Novel friction-based techniques, including friction stir welding and processing, deformation-driven metallurgy, friction stir additive manufacturing, etc.;
  • The fabrication of novel materials with extraordinary mechanical and wear performances, including metallic and polymeric materials;
  • The welding and joining of dissimilar materials based on the principle of severe plastic deformation;
  • The design of anti-wear coatings and substrates of friction stir welding tools to realize significantly extended service lives.

Dr. Yuming Xie
Dr. Xiangchen Meng
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. Coatings 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

  • friction-based techniques
  • surface modifications
  • metallic materials
  • polymeric materials
  • friction
  • wear
  • mechanical properties
  • modeling

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Published Papers (2 papers)

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Research

12 pages, 2446 KiB  
Article
Enhanced Mechanical and Anti-Wear Properties of Magnesium by Alloying and Subsequent Extrusion–Aging Treatment
by Youjie Lv, Shaoqing Li, Feng Guo and Zhiwen Xie
Coatings 2022, 12(10), 1443; https://doi.org/10.3390/coatings12101443 - 30 Sep 2022
Cited by 1 | Viewed by 1503
Abstract
In this work, the microstructure, mechanical, and anti-wear properties of the alloyed-extruded-aged Mg-8.3Gd-4.5Y-1.4Zn-0.3Zr (wt%) alloys were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), nanoindentation, and wear tests. Results showed that the alloying—extrusion processing induced a significant grain refinement of magnesium resulting [...] Read more.
In this work, the microstructure, mechanical, and anti-wear properties of the alloyed-extruded-aged Mg-8.3Gd-4.5Y-1.4Zn-0.3Zr (wt%) alloys were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), nanoindentation, and wear tests. Results showed that the alloying—extrusion processing induced a significant grain refinement of magnesium resulting in the formation of bulk Mg24(GdYZn)5 at the grain boundaries. The grain size decreased from 116 μm in pure magnesium to 17 μm in alloyed-extruded magnesium, while the grain refinement, solid solution and second phase strengthening led to a hardness enhancement from 0.67 GPa in pure magnesium to 1.64 GPa in alloyed-extruded magnesium. Aging treatment further drove the structural homogenization of the alloyed-extruded magnesium resulting in an enhanced hardness of 1.83 GPa. During the sliding wear tests, a large-area plastic deformation layer formed on the wear track surface of pure magnesium, leading to an unstable friction coefficient and a high wear rate of 2.64 × 10−3 mm3·N−1·m−1. The alloying—extrusion—aging treatments effectively inhibited the formation of the plastic deformation layer. The wear rate of the alloyed-extruded material decreased to 1.60 × 10−3 mm3·N−1·m−1. In contrast, the alloyed-extruded-aged material showed a lower wear rate of 1.16 × 10−3 mm3·N−1·m−1. The wear failure mechanisms of all fabricated materials were further discussed according to the characterization results. Full article
(This article belongs to the Special Issue Friction and Friction-Based Techniques)
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11 pages, 2074 KiB  
Article
Theoretical Study of the Friction Coefficient in the M-B Model
by Hongjun Cao, Min Zhu, Biao Li, Xiaohan Lu, Haiyan Li, Ming Guo, Fei Wu and Zijian Xu
Coatings 2022, 12(10), 1386; https://doi.org/10.3390/coatings12101386 - 22 Sep 2022
Cited by 5 | Viewed by 1704
Abstract
In order to study the influencing factors of friction coefficient in an M-B model, based on the basic model of fractal theory, the distribution function and probability distribution density of the micro-convex body truncation area are derived by using mathematical and statistical means, [...] Read more.
In order to study the influencing factors of friction coefficient in an M-B model, based on the basic model of fractal theory, the distribution function and probability distribution density of the micro-convex body truncation area are derived by using mathematical and statistical means, and a new model of critical truncation area and friction coefficient in fractal surface contact process are proposed. Considering the differences between the actual contact area and the truncated area during plastic deformation of the micro-convex body, a correction factor is introduced. Focusing on the mechanism of the elastic-plastic transition phase, and finally a friction coefficient model based on the fractal dimension, the normal force and correction factor is derived. Finally, the friction coefficient of fractal surface is simulated and verified by taking nickel as an example, and it is proved that the new model is correct in predicting the change trend of friction coefficient in the M-B model. Full article
(This article belongs to the Special Issue Friction and Friction-Based Techniques)
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