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Micromachines
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Laser Additive Manufacturing: Design, Materials, Processes and Applications, 3rd Edition
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Laser Additive Manufacturing: Design, Materials, Processes and Applications, 3rd Edition

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D3: 3D Printing and Additive Manufacturing".

Deadline for manuscript submissions: 30 October 2025 | Viewed by 1413

Special Issue Editors

Dr. Xu Song

E-Mail Website
Guest Editor
Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong, China
Interests: design for additive manufacturing; laser powder bed fusion; residual stresses; deformation analysis in manufacturing processes
Dr. Jie Yin

E-Mail Website
Guest Editor
Advanced Manufacturing Research Center, Gemological Institute, China University of Geosciences, Wuhan 430074, China
Interests: additive manufacturing; laser advanced manufacturing; laser-matter interaction; numerical simulation; in situ characterization; microstructures; mechanical properties
Special Issues, Collections and Topics in MDPI journals
Dr. Yang Liu

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Ningbo University, Ningbo 315211, China
Interests: additive manufacturing; selective laser melting; crystal plasticity finite element; dynamic mechanical properties; titanium alloy; metal matrix composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Building on the successes of the previous two Special Issues on laser-based additive manufacturing (LAM), this third edition advances our exploration of the rapidly evolving landscape of LAM design, materials, processes, and applications. As a groundbreaking advanced digital manufacturing technology, LAM is pivotal for driving technological innovation and ensuring industrial sustainability. This transformative approach breaks through the limitations of traditional manufacturing, enabling the creation of complex geometries and high-performance components. To fully exploit the potential of LAM, a thorough understanding of its design paradigms, material characteristics, processing methods, structural attributes, and application areas is essential. Such insights are crucial for developing novel functional devices and ensuring the fabrication of defect-free, structurally sound, and reliable additive manufacturing parts.

This Special Issue of Micromachines, titled “Laser Additive Manufacturing: Design, Materials, Processes and Applications, 3rd Edition”, aims to comprehensively cover all facets of this rapidly advancing field. Topics span from macro- to micro-scale additive manufacturing using lasers and high-energy beams, encompassing structure design, fabrication, modeling, and simulation. Additionally, it includes in situ characterization of additive manufacturing processes and ex situ material characterization and performance assessment. This Special Issue also provides an extensive overview of diverse applications across sectors such as aerospace, biomedicine, optics, transportation, and energy.

It is our pleasure to invite you to contribute original articles, comprehensive reviews and letters/opinions to this Special Issue.

Dr. Xu Song
Dr. Jie Yin
Dr. Yang Liu
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. Micromachines 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 2100 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

  • additive manufacturing
  • 3D printing
  • laser powder bed fusion
  • laser-directed energy deposition
  • laser advanced manufacturing
  • design and modeling
  • materials
  • processes
  • characterization
  • mechanical and functional properties
  • applications

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Published Papers (2 papers)

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Research

13 pages, 6668 KiB  
Article
Current-Carrying Wear Behavior of the Laser-Alloyed Al/W Composite Layer Under Different Currents
by Heng Zhang, Bai Li, Yulong Zhu, Congwen Tang, Pengfei Sun, Tao Lai and Dengzhi Wang
Micromachines 2025, 16(5), 523; https://doi.org/10.3390/mi16050523 (registering DOI) - 29 Apr 2025
Abstract
The Al/W composite layer was fabricated on the surface of the aluminum alloy using laser alloying technology to enhance the current-carrying wear resistance. Additionally, the current-carrying wear behaviors of the Al/W composite layer and the aluminum alloy substrate were investigated under different currents. [...] Read more.
The Al/W composite layer was fabricated on the surface of the aluminum alloy using laser alloying technology to enhance the current-carrying wear resistance. Additionally, the current-carrying wear behaviors of the Al/W composite layer and the aluminum alloy substrate were investigated under different currents. The results indicate that the presence of hard phases such as W and Al4W in the composite layer significantly enhanced the wear resistance of the material. Specifically, the average friction coefficient of the Al/W composite layer under different currents was reduced by approximately 9.3–35.8% compared to the aluminum alloy substrate, and the wear rate under current-carrying conditions decreased by about 1.9–6.0 times. For the aluminum alloy substrate, adhesive wear is the dominant mechanism under currents ranging from 0 to 60 A. However, as the current increased to 80 A, the severity of arc erosion intensified, and the wear mechanism transitioned to a combination of arc erosion and adhesive wear. In contrast, for the Al/W composite layer, abrasive wear was the dominant wear mechanism in the absence of electrical current. Upon the introduction of the current, the wear mechanism changed to a coupling effect of arc erosion and adhesive wear. Full article
(This article belongs to the Special Issue Laser Additive Manufacturing: Design, Materials, Processes and Applications, 3rd Edition)
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16 pages, 34271 KiB  
Article
Metal Transfer Behavior and Molten Pool Dynamics in Cold Metal Transfer Pulse Advanced Additive Manufacturing of 7075 Aluminum Alloy
by Yili Wang, Dongbin Zhang and Chen Zhang
Micromachines 2024, 15(12), 1489; https://doi.org/10.3390/mi15121489 - 12 Dec 2024
Viewed by 906
Abstract
Wire arc additive manufacturing (WAAM) with a special arc mode of cold metal transfer pulse advanced (CMT-PADV) is an ideal additive manufacturing process for fabricating aerospace components, primarily high-strength aluminum alloys, offering advantages such as high deposition rates and low cost. However, the [...] Read more.
Wire arc additive manufacturing (WAAM) with a special arc mode of cold metal transfer pulse advanced (CMT-PADV) is an ideal additive manufacturing process for fabricating aerospace components, primarily high-strength aluminum alloys, offering advantages such as high deposition rates and low cost. However, the numerical simulation of the CMT-PADV WAAM process has not been researched until now. In this study, we first developed a three-dimensional fluid dynamics model for the CMT-PADV WAAM of 7075 aluminum alloy, aiming at analyzing the droplet transition and molten pool flow. The results indicate that, under the CMT-PADV mode, droplet transition follows a mixed transition mode, combining short-circuiting and spray transition. The Direct Current Electrode Positive period of the arc accelerates droplet spray transition, significantly increasing molten pool flow. In contrast, the Direct Current Electrode Negative period of the arc predominantly features droplet short-circuiting transition with low heat input and a weak impact on the molten pool. The periodic switching of the current polarity of CMT-PADV mode results in periodic variations in molten pool size and volume, reducing heat input while maintaining high deposition quality. The revelation of this mechanism provides process-based guidance for low-defect, high-performance manufacturing of critical components. Full article
(This article belongs to the Special Issue Laser Additive Manufacturing: Design, Materials, Processes and Applications, 3rd Edition)
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