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Coatings
Special Issues
Laser Surface Modifications and Additive Manufacturing
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Laser Surface Modifications and Additive Manufacturing

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

Deadline for manuscript submissions: 15 October 2024 | Viewed by 925

Special Issue Editor

Dr. Yulong Fu

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Interests: laser surface modification; laser additive manufacturing; titanium alloys; high-strength steel; stainless steel; extreme environments

Special Issue Information

Dear Colleagues,

This Special Issue focuses on laser surface modification and additive manufacturing. Laser surface modification can enhance the surface properties of materials, which can better meet the application of materials in harsh environments. Laser additive manufacturing can achieve a high quality and an efficient formation of parts, as well as quickly repair damaged structures. However, it is extremely difficult to perform in situ laser surface modification and additive manufacturing in extreme environments (such as marine and nuclear power). Therefore, the means with which to reduce or even eliminate the impact of extreme environments on laser surface modification and additive manufacturing is extremely important. Laser surface modification and additive manufacturing involve many disciplines such as materials, metallurgy, mechanical engineering and intelligent control. This Special Issue will explore the mechanisms, methods and techniques of laser surface modification and additive manufacturing, and discuss their impact on material properties and applications. We will delve into the applications of laser surface modification and additive manufacturing in the fields of energy, environment, healthcare and other fields. By reading this Special Issue, readers will gain insight into the laser surface modification and additive manufacturing of a variety of materials and their potential in actual service scenarios. We are pleased to invite you to provide your findings and insights on laser surface modification and additive manufacturing. Authors are encouraged to submit papers on fundamental aspects, experimental studies and theoretical analyses of laser surface modification and additive manufacturing of various materials.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Theoretical and experimental research, knowledge and new ideas in laser surface modification and laser additive manufacturing mechanisms;
  • Microstructural and mechanical analysis techniques;
  • Defect assessment and identification at various stages;
  • Corrosion resistance evaluation;
  • Advanced non-destructive techniques for monitoring the laser surface modification and additive manufacturing processes;
  • Computer modeling and simulation to predict coating properties;
  • Performance, durability and reliability in service environments;
  • Understanding the degradation mechanisms of coating exposure to high temperatures, high stress and other extreme environment applications;
  • The effects of extreme environments on laser surface modification and additive manufacturing.

Dr. Yulong Fu
Guest Editor

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

  • laser surface modification
  • laser additive manufacturing
  • extreme environments
  • microstructure and properties
  • finite element simulation

Published Papers (1 paper)

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Research

17 pages, 9151 KiB  
Article
The Effect of Laser Power on the Microstructure and Wear Resistance of a Ni3Al-Based Alloy Cladding Layer Deposited via Laser Cladding
by Yihui Cai, Zhizhong Dong, Lin Zhao, Yun Peng and Yang Cao
Coatings 2024, 14(3), 317; https://doi.org/10.3390/coatings14030317 - 6 Mar 2024
Viewed by 752
Abstract
A coating prepared via laser cladding has the advantages of a high-density reinforced layer, a low matrix dilution rate, and combination with matrix metallurgy. In this study, Ni3Al-based alloy cladding layers with Cr7C3 were prepared via laser cladding, [...] Read more.
A coating prepared via laser cladding has the advantages of a high-density reinforced layer, a low matrix dilution rate, and combination with matrix metallurgy. In this study, Ni3Al-based alloy cladding layers with Cr7C3 were prepared via laser cladding, and the corresponding microstructures and wear resistance were studied in detail. The results show that the Ni3Al-based cladding layer prepared using laser cladding technology had good metallurgical bonding with the matrix, and there were no pores, cracks, or other defects on the surface. The microstructures of the laser cladding layer were mainly γ′-Ni3Al, β′-NiAl, and in situ C7C3. As the laser power increased, the heat input increased, resulting in an increase in the dilution rate. Simultaneously, the carbide size in the laser cladding layer increased. With the increase in laser power, the hardness of the laser cladding layer of the Ni3Al-based alloy decreased, and the wear resistance of the laser cladding layer first strengthened and then weakened. When the laser power increased to 2.0 kW, the wear rate of the laser cladding layer decreased to 0.480 × 10−5 mm3/N·m. When the laser power increased to 2.4 kW, the wear rate of the laser cladding layer increased to 0.961 × 10−5 mm3/N·m, which was twice the rate at 2.0 kW. This could be attributed to small Cr7C3 particles, which could not effectively separate the wear pairs, resulting in more serious adhesive wear. Large Cr7C3 particles caused the surface of cast iron material with lower hardness to be damaged, which suffered more serious particle wear. The generation of short rod-shaped carbides should be avoided because, in the process of friction and wear, carbides with these shapes are easy to break, thus leading to crack initiation. Full article
(This article belongs to the Special Issue Laser Surface Modifications and Additive Manufacturing)
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