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Advances in Alloy Surface Mechanics: The Effects of Coating Technologies...
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Advances in Alloy Surface Mechanics: The Effects of Coating Technologies on Performance

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: 20 June 2026 | Viewed by 3560

Special Issue Editors

Dr. Ningning Li

E-Mail Website
Guest Editor
School of Materials and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Interests: material forming; surface protection
Dr. Yaling Deng

E-Mail Website
Guest Editor
College of Intelligent Science and Control Engineering, Jinling Institute of Technology, Nanjing 211169, China
Interests: surface modification; surface coating; tribology; polymer hydrogel; nanoparticles

Special Issue Information

Dear Colleagues,

Recent advancements in alloy surface mechanics have highlighted the critical role of coating technologies in enhancing material performance across industrial applications. This Special Issue aims to explore the multifaceted interactions between coating systems and alloy substrates, focusing on how innovative coating technologies optimize mechanical properties, durability, and functionality under extreme conditions.

Spanning theoretical analyses, experimental investigations, and computational modeling, this Special Issue welcomes original research and reviews addressing the following key themes: mechanisms of coating-induced improvements in hardness, wear resistance, and fatigue strength; novel coating processes (e.g., thermal spray, CVD, additive manufacturing); performance under harsh environments (high temperatures, corrosive media, dynamic loading); and degradation pathways of coated alloys. Interdisciplinary studies integrating materials science, mechanical engineering, and surface chemistry are particularly encouraged to advance fundamental understanding and practical applications in aerospace, automotive, energy, and biomedical sectors.

We invite contributions that push the boundaries of alloy surface mechanics, fostering dialog on cutting-edge coating solutions for next-generation material systems.

Potential topics:

  1. Mechanisms of coating-induced mechanical property enhancements;
  2. Advanced coating fabrication processes (thermal spray, CVD, additive manufacturing);
  3. Coating performance under extreme environments (high temperatures, corrosion, dynamic loading);
  4. Degradation mechanisms of coated alloys (wear, corrosion, interface failure);
  5. Computational modeling and simulation of coating performance;
  6. Interdisciplinary approaches in coating design and testing.

Dr. Ningning Li
Dr. Yaling Deng
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 250 words) can be sent to the Editorial Office for assessment.

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

  • alloy surface mechanics
  • coating technologies
  • mechanical performance
  • wear resistance
  • corrosion protection

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (5 papers)

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Research

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17 pages, 8049 KB  
Article
Effect of Welding Current on Microstructure and Mechanical and Corrosion Properties of 7075/7075 Pulsed MIG Welded Joints
by Tong Wu, Yaqiang Wang, Linjun Liu, Shuai Li and Hongfeng Liu
Coatings 2025, 15(12), 1437; https://doi.org/10.3390/coatings15121437 - 6 Dec 2025
Viewed by 189
Abstract
This study investigates the effects of welding current on the microstructure, mechanical properties, and corrosion behavior of 7075/7075 pulsed metal inert gas (P-MIG) welded joints. Welding experiments were conducted at currents of 190 A, 200 A, and 210 A using ER5356 filler wire, [...] Read more.
This study investigates the effects of welding current on the microstructure, mechanical properties, and corrosion behavior of 7075/7075 pulsed metal inert gas (P-MIG) welded joints. Welding experiments were conducted at currents of 190 A, 200 A, and 210 A using ER5356 filler wire, with the joints analyzed through optical microscopy (OM), scanning electron microscopy (SEM/EDS), and tensile and hardness testing, as well as intergranular and electrochemical corrosion evaluations. The results reveal that increasing welding current alters the solidification dynamics and precipitation behavior in the WZ. At 190 A, refined and uniformly distributed dendrites were obtained, whereas at 210 A, grains coarsened and elemental segregation was more pronounced. The weld hardness exhibited a trend of first increasing and then slightly decreasing with increasing welding current, with a maximum value of 99.5 HV0.1 obtained at 200 A. Similarly, the tensile strength improved with increasing welding current, reaching 257.7 MPa with 8% elongation at 210 A. Corrosion resistance exhibited a non-monotonic trend, with the best performance observed at 200 A, as indicated by the shallowest intergranular corrosion depth, the most positive open-circuit potential, and the highest charge transfer resistance in electrochemical impedance spectroscopy. The findings demonstrate that welding current is a critical parameter controlling the balance between microstructural refinement, mechanical strengthening, and corrosion resistance, and that 200 A represents the optimal condition under the investigated parameters. These insights provide theoretical guidance and experimental evidence for process optimization in the welding of high-strength aluminum alloys. Full article
(This article belongs to the Special Issue Advances in Alloy Surface Mechanics: The Effects of Coating Technologies on Performance)
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21 pages, 8896 KB  
Article
Structural and Phase Characteristics and Properties of Multilayer Cr/CrN Coatings Obtained by Magnetron Sputtering
by Nazerke Muktanova, Bauyrzhan Rakhadilov, Erasyl Naimankumaruly and Aisulu Kalitova
Coatings 2025, 15(12), 1375; https://doi.org/10.3390/coatings15121375 - 24 Nov 2025
Viewed by 327
Abstract
Multilayer Cr/CrN coatings with two-, four-, and six-layer architectures were deposited on E110 zirconium alloy substrates by reactive magnetron sputtering. The effect of layer number on structure, phase composition, and performance was systematically investigated. XRD revealed that the coatings consisted mainly of CrN [...] Read more.
Multilayer Cr/CrN coatings with two-, four-, and six-layer architectures were deposited on E110 zirconium alloy substrates by reactive magnetron sputtering. The effect of layer number on structure, phase composition, and performance was systematically investigated. XRD revealed that the coatings consisted mainly of CrN and Cr phases, with an increase in the CrN fraction and texture intensity as the number of layers increased. Cross-sectional SEM and EDS analyses confirmed the formation of dense multilayer structures with clear Cr/CrN interfaces and strong adhesion to the substrate. Nanoindentation showed a progressive increase in hardness and Young’s modulus from 2.59 ± 0.09 GPa and 97 ± 2 GPa (two-layer) to 5.0 ± 0.27 GPa and 110 ± 4 GPa (six-layer), respectively. Tribological and scratch tests demonstrated that the 6-layer coating exhibited the lowest wear rate and highest adhesion strength (Lc ≈ 20.5 N). Full article
(This article belongs to the Special Issue Advances in Alloy Surface Mechanics: The Effects of Coating Technologies on Performance)
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Review

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24 pages, 4914 KB  
Review
Recent Advances in Magnetocaloric Effect of High-Entropy Alloys
by Xiaoli Zhang, Ziwei Guo, Fulong Zhang and Yanzhou Li
Coatings 2025, 15(12), 1425; https://doi.org/10.3390/coatings15121425 - 4 Dec 2025
Viewed by 570
Abstract
High-entropy alloys (HEAs), as a novel class of materials, have attracted widespread attention in the field of materials science due to their unique multi-element high-concentration mixing design. Recent research has found that this alloy mixing strategy not only exhibits excellent performance in structural [...] Read more.
High-entropy alloys (HEAs), as a novel class of materials, have attracted widespread attention in the field of materials science due to their unique multi-element high-concentration mixing design. Recent research has found that this alloy mixing strategy not only exhibits excellent performance in structural properties but also shows potential in functional materials. This review summarizes the progress of research on HEAs in the magnetocaloric effect (MCE) area, first introducing the basic principles of MCE and the related concepts of HEAs. It then summarizes the research progress of rare-earth HEAs, non-rare-earth HEAs, and rare-earth-transition metal composite HEAs in MCE. Finally, this review outlines future research directions for HEAs in the MCE field, laying the groundwork for further applications of HEAs in the magnetocaloric field. Full article
(This article belongs to the Special Issue Advances in Alloy Surface Mechanics: The Effects of Coating Technologies on Performance)
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19 pages, 2172 KB  
Review
Preparation and Classification of Coatings by High-Energy Ball Milling: A Review
by Zhanfeng Qi, Hengye Zhang, Xiuli Guo and Le Geng
Coatings 2025, 15(11), 1343; https://doi.org/10.3390/coatings15111343 - 19 Nov 2025
Viewed by 716
Abstract
High-energy ball milling (HEBM) offers a pathway for the green preparation of multifunctional coatings. However, existing research lacks systematic frameworks addressing the interplay of HEBM process parameters, elemental screening criteria, and coating classification systems. This study establishes a comprehensive “elemental screening–process synergy–classification and [...] Read more.
High-energy ball milling (HEBM) offers a pathway for the green preparation of multifunctional coatings. However, existing research lacks systematic frameworks addressing the interplay of HEBM process parameters, elemental screening criteria, and coating classification systems. This study establishes a comprehensive “elemental screening–process synergy–classification and prediction” framework for HEBM coatings. Key contributions include establishing a two-tier screening criterion based on non-radioactivity/low-toxicity and functionality for coating elements; revealing the synergistic effects of key process parameters; proposing a dual-dimensional coating classification system based on composition and function; and constructing a quantitative database encompassing 11 key performance indicators. This work provides theoretical foundations and data-driven guidance for the precise design and selection of high-performance HEBM coatings. Full article
(This article belongs to the Special Issue Advances in Alloy Surface Mechanics: The Effects of Coating Technologies on Performance)
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24 pages, 3803 KB  
Review
Review of Preparation and Key Functional Properties of Micro-Arc Oxidation Coatings on Various Metal Substrates
by Ningning Li, Huiyi Wang, Qiuzhen Liu, Zhenjie Hao, Da Xu, Xi Chen, Datian Cui, Lei Xu and Yaya Feng
Coatings 2025, 15(10), 1201; https://doi.org/10.3390/coatings15101201 - 12 Oct 2025
Cited by 1 | Viewed by 1561
Abstract
Micro-arc oxidation (MAO) technology demonstrates remarkable advantages in fabricating ceramic coatings on lightweight alloys. For aluminum alloys, MAO rapidly forms dense, pore-free ceramic layers within minutes, significantly enhancing corrosion and wear resistance at low processing costs. In magnesium alloys, optimized electrolyte compositions and [...] Read more.
Micro-arc oxidation (MAO) technology demonstrates remarkable advantages in fabricating ceramic coatings on lightweight alloys. For aluminum alloys, MAO rapidly forms dense, pore-free ceramic layers within minutes, significantly enhancing corrosion and wear resistance at low processing costs. In magnesium alloys, optimized electrolyte compositions and process parameters enable composite coatings with a combination of high hardness and self-lubrication properties, while post-treatments like laser melting or corrosion inhibitors extend salt spray corrosion resistance. Titanium alloys benefit from MAO coatings with exceptional interfacial bonding strength and mechanical performance, making them ideal for biomedical implants and aerospace components. Notably, dense ceramic oxide films grown in situ via MAO on high-entropy alloys (HEAs) triple surface hardness and enhance wear/corrosion resistance. However, MAO applications on steel require pretreatments like aluminizing, thermal spraying, or ion plating. Current challenges include coating uniformity control, efficiency for complex geometries, and long-term stability. Future research focuses on multifunctional coatings (self-healing, antibacterial) and eco-friendly electrolyte systems to expand engineering applications. Full article
(This article belongs to the Special Issue Advances in Alloy Surface Mechanics: The Effects of Coating Technologies on Performance)
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