Surface Engineering of Alloys: Durability and 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 August 2026 | Viewed by 1229

Special Issue Editor


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Guest Editor
Research Institute of Automobile Parts Technology, Hunan Institute of Technology, Hengyang 421002, China
Interests: surface modification and advanced manufacturing technology

Special Issue Information

Dear Colleagues,

Surface engineering stands as a pivotal discipline for enhancing the performance and extending the service life of metallic components across virtually all sectors of modern industry. In the realm of alloys—from lightweight aluminum and magnesium to high-strength steels and superalloys—the demands for superior durability, reliability and multifunctionality are ever-increasing. Spurred by the stringent requirements of applications in aerospace, automotive, biomedical implants and energy technologies, research is intensifying to develop surface solutions that can withstand extreme environments, including mechanical wear, corrosion, oxidation and their complex synergisms.

This pursuit is driven by advancements in our fundamental understanding of degradation mechanisms and the development of novel, often nanostructured, coatings and surface modification techniques. The design and manufacture of high-performance surface systems, whether through additive manufacturing, thermal spray, laser processing, plating or vapour deposition techniques, are unlocking unprecedented opportunities to tailor the surface properties of alloys independently from their bulk characteristics.

This Special Issue, “Surface Engineering of Alloys: Durability and Performance,” aims to serve as a premier platform for disseminating cutting-edge research and reviews that address the current challenges and future directions in the field. We invite contributions that explore the synthesis, characterization, modelling and performance evaluation of advanced surface engineering solutions for alloys.

The scope of this Special Issue will cover, but is not limited to, the following topics:

  1. Advanced Coating Technologies: Development of novel monolithic, composite, multilayered and gradient coatings;
  2. Innovative Surface Modification Processes: Research on processes such as laser cladding, plasma electrolytic oxidation, friction stir processing, shot peening and other thermo-chemical treatments;
  3. Multifunctional Surfaces: Coatings and surfaces that provide combined properties, such as corrosion-wear resistance, thermal barrier capabilities, anti-fouling or biocompatibility;
  4. Degradation Mechanisms: In-depth investigation of failure modes, including corrosion (uniform, pitting, stress corrosion cracking), wear, fretting, fatigue and their interactions (tribocorrosion);
  5. Performance under Extreme Conditions: Experimental and theoretical studies on the behaviour of surface-engineered alloys in high-temperature, high-stress, corrosive or erosive environments;
  6. Modelling and Simulation: Predictive modelling of microstructural evolution, residual stresses, coating growth and long-term performance and lifetime;
  7. Advanced Characterization: Application of in situ, operando and multi-scale techniques to understand structure-property relationships and degradation pathways.

Dr. Pengcheng Guo
Guest Editor

Manuscript Submission Information

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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

  • extreme environments
  • reliability coatings
  • performance modelling
  • stress corrosion

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Published Papers (2 papers)

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Research

13 pages, 3091 KB  
Article
Study on Annealed Microstructure and Mechanical Properties of Cold-Rolled FeCoCrNiMn High-Entropy Alloy
by Wenquan Zhao, Xiaocong Li, Zhikun Li and Shilong Xing
Coatings 2026, 16(5), 513; https://doi.org/10.3390/coatings16050513 - 23 Apr 2026
Viewed by 349
Abstract
An equiatomic FeCoCrNiMn high-entropy alloy was processed by cold rolling followed by isothermal annealing at 900 °C for various durations. The microstructural evolution and mechanical properties of the alloy were systematically investigated as a function of annealing time. The results indicate that the [...] Read more.
An equiatomic FeCoCrNiMn high-entropy alloy was processed by cold rolling followed by isothermal annealing at 900 °C for various durations. The microstructural evolution and mechanical properties of the alloy were systematically investigated as a function of annealing time. The results indicate that the alloy maintained a single-phase face-centered cubic (FCC) structure throughout the entire annealing process, with no secondary phases or precipitates detected. After annealing at 900 °C for 2 min, the recrystallized volume fraction reached approximately 80%, resulting in the formation of an ultrafine-grained microstructure. The corresponding Vickers hardness, yield strength, and total elongation were measured to be 249 HV, 616 MPa, and 32%, respectively, demonstrating a desirable combination of strength and ductility. The recrystallization process was essentially complete after 5 min of annealing. With further increases in annealing time, the grain size continued to coarsen, accompanied by a gradual decrease in hardness and strength and a progressive improvement in ductility, reflecting a typical strength–ductility trade-off. Full article
(This article belongs to the Special Issue Surface Engineering of Alloys: Durability and Performance)
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15 pages, 4234 KB  
Article
An In Vitro Investigation of Gas and Dye Leakage at the Implant–Abutment Junction Using Titanium and Cobalt Chrome-Based Abutments
by Amylia Kesha Bal, Terry Richard Walton, Hedi Verena Kruse and Dale Geoffrey Howes
Coatings 2026, 16(3), 388; https://doi.org/10.3390/coatings16030388 - 22 Mar 2026
Viewed by 588
Abstract
The lack of integrity at the implant–abutment junction (IAJ) contributes to problems such as micromovements and microbial colonisation. This study aimed to (1) design a protocol for assessing microleakage at the IAJ using chromophore analysis not previously reported for this specific application, (2) [...] Read more.
The lack of integrity at the implant–abutment junction (IAJ) contributes to problems such as micromovements and microbial colonisation. This study aimed to (1) design a protocol for assessing microleakage at the IAJ using chromophore analysis not previously reported for this specific application, (2) compare gas and dye leakage between titanium (Ti) and cobalt chrome (CoCr) abutments, and (3) assess the effect of gold (Au) gilding on sealing. Forty abutments were divided into five groups: milled Ti (MTi); cast CoCr (CCoCr); milled CoCr (MCoCr); cast CoCr with Au gilding (CCoCrG); and milled CoCr with Au gilding (MCoCrG). Samples were subjected to internal pressure within a gas and dye reservoir. Chromophore analysis via UV-Vis spectrometer was used to calculate crystal violet leakage concentrations. Scanning electron microscopy (SEM) revealed close adaptation in the MTi and MCoCr groups, contrasting with irregularities in the CCoCr groups. Correspondingly, gas leakage and dye leakage were most prevalent in the CCoCr group. Fisher exact test demonstrated a statistically significant difference (p = 0.026) between the MCoCr and CCoCr abutments. While CCoCr exhibited the highest failure rate (62.5%), Au gilding demonstrated a trend toward reduced leakage (25% failure rate), though this did not reach statistical significance (p = 0.315). This chromophore analysis represents a viable and objective assessment of IAJ integrity. Full article
(This article belongs to the Special Issue Surface Engineering of Alloys: Durability and Performance)
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