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Research in Laser Welding and Surface Treatment Technology
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Research in Laser Welding and Surface Treatment Technology

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

Deadline for manuscript submissions: 31 August 2025 | Viewed by 1527

Special Issue Editors

Dr. Kun Liu

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
Interests: welding; hot cracking; laser cladding; diffusion bonding; waam; additive manufacturing
Dr. Wenhui Yu

E-Mail Website
Guest Editor
School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
Interests: laser powder bed fusion; laser manufacturing; surface engineering
Dr. Jieren Guan

E-Mail Website
Guest Editor
Marine Equipment and Technology Institute, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Interests: additive manufacturing; composites; non-ferrous metal; multi-materials processing

Special Issue Information

Dear Colleagues,

As a common representative of a new high-efficiency and high-quality welding technology, laser welding technology has numerous technical advantages, such as high quality, high efficiency, high stability, and low deformation. Laser welding technology has been widely applied in fields of aerospace, automobile manufacturing, ship engineering, and construction machinery.

Laser surface treatment technology is used to create physical and chemical changes on the surface of materials through the interaction between laser and material; it provides the surface of materials with better mechanical properties. Laser surface treatment is an effective way to improve the hardness, wear resistance, and corrosion resistance of materials.

The scope of this Special Issue will serve as a forum for papers on the following topics:

  • Laser surface treatment processes including, but not limited to, additive manufacturing processes, laser cladding, laser alloying, laser quenching, etc.
  • Recent developments in laser welding and surface treatment technology.
  • Theoretical and experimental research, knowledge, and new ideas regarding laser welding and surface treatment.
  • Computer modeling and simulation for predicting properties, performance, durability, and reliability of joints or coatings.
  • Understanding the microstructural evolution of joints or coatings.

Dr. Kun Liu
Dr. Wenhui Yu
Dr. Jieren Guan
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

  • reliability coatings
  • laser welding and joining
  • laser cladding coatings
  • additive manufacturing
  • protective corrosion coatings

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

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

Published Papers (2 papers)

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Research

16 pages, 8715 KiB  
Article
Enhancing Strength and Ductility in the Nugget Zone of Friction Stir Welded X80 Pipeline Steel via Applying Cooling Medium
by Ruihai Duan, Guangming Xie, Xiaonan Qi, Zhaojie Wang, Shujin Chen and Ying Dong
Coatings 2025, 15(3), 260; https://doi.org/10.3390/coatings15030260 - 21 Feb 2025
Viewed by 500
Abstract
Fusion welding easily causes microstructural coarsening and tempering softening in the heat-affected zone (HAZ) of high-strength pipeline steel joints, which considerably deteriorates the strength and toughness. Here, X80 pipeline steel was subjected to friction stir welding (FSW), and external cooling was used to [...] Read more.
Fusion welding easily causes microstructural coarsening and tempering softening in the heat-affected zone (HAZ) of high-strength pipeline steel joints, which considerably deteriorates the strength and toughness. Here, X80 pipeline steel was subjected to friction stir welding (FSW), and external cooling was used to tailor the microstructure to optimize the strength–ductility combination of the nugget zone (NZ). Coarse granular bainite (GB) appeared at air cooling, whereas a fine ferrite/martensite microstructure was achieved at solid CO2 cooling. The highest ratio of high-angle boundaries was obtained at solid CO2 cooling because the variants were evenly distributed within the four close-packed (CP) groups. The low yield strength (YS) of 595 MPa was obtained in the NZ under air cooling, whereas a high YS of 755 MPa was achieved in the NZ under solid CO2 cooling due to dislocation strengthening and fine-grain strengthening. Furthermore, an ultra-high tensile strength of 910 MPa and utilizable elongation of 15% were obtained in the NZ under solid CO2 cooling, which was attributed to the fine effective grains and ferrite/martensite microstructure facilitating a ductile fracture. Full article
(This article belongs to the Special Issue Research in Laser Welding and Surface Treatment Technology)
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18 pages, 17129 KiB  
Article
Effect of Laser Energy Density on the Microstructure and Mechanical Properties of Al2O3/Inconel 718 Nanocomposites Fabricated by SLM
by Haozhe Zhang, Guixiang Zhang, Wenhui Yu, Linzhi Jiang, Jinli Xiang, Yandan Xia and Kun Liu
Coatings 2025, 15(1), 81; https://doi.org/10.3390/coatings15010081 - 14 Jan 2025
Viewed by 725
Abstract
Metal-matrix nanocomposites (MMNCs) with high performance have broad application prospects. Selective laser melting (SLM) was employed to fabricate Al2O3-reinforced Inconel 718 nanocomposites. The influence of laser energy density (E) on the microstructure and properties of the materials [...] Read more.
Metal-matrix nanocomposites (MMNCs) with high performance have broad application prospects. Selective laser melting (SLM) was employed to fabricate Al2O3-reinforced Inconel 718 nanocomposites. The influence of laser energy density (E) on the microstructure and properties of the materials was thereafter investigated. The results show that the microstructure and mechanical properties of the composite can be significantly improved by optimizing E. When E increased from 219 J/mm3 to 288 J/mm3, the size of the Al2O3 reinforcement reduced, and the average grain diameter of the matrix was found to decrease from 1.09 μm to 0.22 μm. Additionally, the relative density improved from 89.82% to 97.04%. When the laser energy density is 288 J/mm3, the sample exhibits favorable hardness and wear resistance. The average microhardness of samples with 288 J/mm3 reaches 379.32 HV0.5 Compared with 219 J/mm3 sample, the increase is 15.01%. The average friction coefficient and wear rate decreased to 0.24 and 3.75 × 10−4 mm3/N·m, respectively. Notably, compared with the samples with E of 219 J/mm3, these values reduced significantly by 60.65% and 60.15%, respectively. The study results can provide technical support for the production of MMNCs with high performance by SLM in industry. Full article
(This article belongs to the Special Issue Research in Laser Welding and Surface Treatment Technology)
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