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Metals
Special Issues
Fundamentals and Applications of Laser Welding
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Fundamentals and Applications of Laser Welding

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Welding and Joining".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 2537

Special Issue Editor

Dr. Yanxi Zhang

E-Mail Website
Guest Editor
Guangdong Provincial Welding Engineering Technology Research Center, Guangdong University of Technology, Guangzhou 510006, China
Interests: laser welding; laser welding of dissimilar materials; numerical simulation of welding process; welding defect detection

Special Issue Information

Dear Colleagues,

Laser welding is an efficient and precise welding method utilizing a high energy density laser beam as the heat source. Laser welding is one of the important applications of laser material processing technology, and is receiving more and more attention from both industrial and research communities.

Studies of laser welding fundamentals are of great significance to further improve the laser welding technology and expand the applications of laser welding. The topics cover the interaction of laser heat source and different kinds of material, the absorption and scattering mechanism of laser beams by laser-induced plasma/metal vapor, intelligent control of laser heat source, laser–arc hybrid welding, molten pool and keyhole behavior during laser welding, mechanism and online/offline detection of welding defects, modeling and numerical simulation of laser welding, etc.

This Special Issue of Metals welcomes papers focusing on the following topics.

  • Reviews and investigations on laser welding fundamentals and applications.
  • Studies on laser welding monitoring, defects detection, microstructure analysis, on laser welding or laser hybrid welding.
  • Simulations studies on laser welding molten pool, plasma/vapor, keyhole dynamics.
  • Studies on the absorption and scattering mechanism of laser beam by laser-induced plasma/metal vapor
  • Studies on fusing of multi-sensor data, intelligent methods with machine learning related to laser welding or laser hybrid welding
  • Studies on non-destructive inspection methods of laser welding or laser hybrid welding defects.

We are sincerely looking forward to receiving your submission.

Dr. Yanxi Zhang
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. Metals 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 welding
  • fundamentals of laser welding
  • applications of laser welding
  • laser welding monitoring
  • non-destructive inspection

Published Papers (2 papers)

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Research

25 pages, 22196 KiB  
Article
Validation of a Theoretical Model for Laser Welding Thermal Field by Multi-Physics Numerical Simulation
by Fabio Giudice and Andrea Sili
Metals 2023, 13(12), 2020; https://doi.org/10.3390/met13122020 - 16 Dec 2023
Cited by 1 | Viewed by 1137
Abstract
Theoretical models based on solutions of the conduction heat transfer equation have been widely proposed to calculate the thermal fields generated during laser welding, revealing simplification benefits and limitations in the accuracy of the results. In previous papers, the authors have introduced a [...] Read more.
Theoretical models based on solutions of the conduction heat transfer equation have been widely proposed to calculate the thermal fields generated during laser welding, revealing simplification benefits and limitations in the accuracy of the results. In previous papers, the authors have introduced a parameterized analytical model based on the configuration of a virtual system of multiple mobile heat sources that simulates the effects of an actual keyhole welding mode by setting the system parameters so as to fit the calculated contours of the fusion zone in the weld cross-section of the experimental one. Even though a basic validation was already carried out by experimental detection, in order to further strengthen the model validity, this article deals with an extensive comparison between the results obtained by a multi-physics numerical simulation, performed by a commercial CFD software, and a theoretical one. The two different approaches were applied to the laser beam welding of butt-positioned AISI 304L steel plates. The investigation was focused on the effects of the keyhole on the main morphological features of the melt pool and fusion zone, and on the thermal fields obtained by the two models. The intrinsic differences between the two approaches, and how they are reflected in the corresponding results, were discussed. Satisfactory results were obtained by comparing the thermal fields, with a substantial convergence of the results, so as to validate the analytical model, assess the accuracy of its results, and define its application limits. Full article
(This article belongs to the Special Issue Fundamentals and Applications of Laser Welding)
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15 pages, 10509 KiB  
Article
Effect of Laser Welding Parameters with Different Fillers on Solidification Cracking and Mechanical Properties of AA7075
by Mohammed Alkhabbat, François Nadeau, Fatemeh Mirakhorli, Thien-My Dao and Xuan-Tan Pham
Metals 2023, 13(10), 1704; https://doi.org/10.3390/met13101704 - 7 Oct 2023
Cited by 1 | Viewed by 1105
Abstract
AA7075 is considered a ‘non-weldable’ alloy using fusion welding methods. In this study, laser welding is applied in pulse mode to weld 2 mm thick AA7075 aluminum alloy plates using different fillers. The aim is to identify the influence of welding parameters and [...] Read more.
AA7075 is considered a ‘non-weldable’ alloy using fusion welding methods. In this study, laser welding is applied in pulse mode to weld 2 mm thick AA7075 aluminum alloy plates using different fillers. The aim is to identify the influence of welding parameters and fillers on solidification cracking susceptibility during laser welding using the circular patch test (CPT). X-ray radiography was used to detect and measure cracks in the CPT samples. Furthermore, the effects of the laser welding process and chemical composition of fillers on the accumulated crack length (CCL), microstructure, and mechanical properties were investigated. Moreover, the mechanical behavior and local deformation of the fusion zone (FZ) were investigated using micro-flat tensile tests with digital image correlation. The mechanical properties of the FZ were correlated with the CCL as well as with the microstructure of the FZ, which was investigated experimentally. The results show that the chemical composition of fillers and welding speed affect the CCL of solidification cracks. Changes in the microstructure were observed within the fusion zone, and the structure became uniform and finer with the formation of Mg2Si and magnesium-rich, copper, and zinc (η-phase) particles. Full article
(This article belongs to the Special Issue Fundamentals and Applications of Laser Welding)
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