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Metals
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Laser Welding Innovations
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Laser Welding Innovations

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

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 8949

Special Issue Editor

Prof. Dr. Jose Maria Sánchez-Amaya

E-Mail Website
Guest Editor
Universidad de Cadiz, Departamento de Ciencia de los Materiales e Ingenieria Metalúrgica y Química Inorgánica, Cadiz, Spain
Interests: laser beam welding; hybrid laser welding; laser remelting; industrial alloys; microstructure; mechanical properties; corrosion
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Laser beam welding (LBW) and its technological variations, such as the laser arc hybrid welding (LAHW) process, are receiving significant attention from both industrial and research communities. Among their advantages, associated to the highly focused heat source, the high welding speed and the minimization of the mechanical distortion and the residual stresses can be highlighted. These benefits make this technology very attractive for engineering applications, as the productivity of all manufacturing processes involving welding steps can be potentially increased by the implementation of LBW-based joining technologies.

Papers focusing of investigation, development, and innovations related to laser beam welding (LBW) and also its hybridization processes, such as LAHW, will be very welcome to this Special Issue of Metals. Studies dealing with LBW/LAHW of metallic alloys (aluminum, titanium, magnesium, carbon steel, stainless steel, superalloys, etc.) with industrial applications in sectors such as naval, automotive, and aeronautical will be covered. Both experimental studies and simulations covering the relationship between laser processing parameters, microstructure, and properties (hardness, strength, corrosion resistance, etc.) will be covered in this issue. In addition, innovative laser welding methods and/or equipment will be welcomed. New approaches providing solutions to actual challenges of this technology are especially interesting in this Special Issue. Comparative studies of LBW with other conventional welding technologies (in terms of process velocity, reproducibility, quality, weld microstructure and properties, and impact on productivity) are highly encouraged for submission.

Prof. Dr. Jose Maria Sánchez-Amaya
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 innovations
  • laser arc hybrid welding
  • laser beam welding
  • industrial alloys
  • experimental and simulations studies
  • weld microstructure and properties
  • technological innovations and new approaches
  • comparison of welding technologies

Published Papers (3 papers)

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Research

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19 pages, 8297 KiB  
Article
The Effects of HLAW Parameters for One Side T-Joints in 15 mm Thickness Naval Steel
by Cristina Churiaque, Jose Maria Sánchez-Amaya, Manuel Porrúa-Lara, Andrey Gumenyuk and Michael Rethmeier
Metals 2021, 11(4), 600; https://0-doi-org.brum.beds.ac.uk/10.3390/met11040600 - 07 Apr 2021
Cited by 2 | Viewed by 2077
Abstract
The present contribution is the first research reporting full penetration HLAW joints in 15 mm thick EH36 steel butt T-welds with square grooves on 2F welding position by single-sided welding. The effects of welding parameters were investigated to increase the quality of the [...] Read more.
The present contribution is the first research reporting full penetration HLAW joints in 15 mm thick EH36 steel butt T-welds with square grooves on 2F welding position by single-sided welding. The effects of welding parameters were investigated to increase the quality of the joints. Conditions leading to defect-free full penetration welds fulfilling naval regulations includes a laser power of 12.5 kW, a welding speed of 1.6 m/min and the vertical laser offset distance from the flange of 1 mm. Advanced characterization of selected welds included a microstructural identification by optical microscopy, SEM, and XRD, revealing the presence of acicular, polygonal and Widmanstätten ferrite, lath martensite, and some retained austenite at FZ. Hardness and microhardness mapping tests showed values of 155 HV at base metal and 200 to 380 HV at the fusion zone connecting the web to the flange. Full article
(This article belongs to the Special Issue Laser Welding Innovations)
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13 pages, 8248 KiB  
Article
Effects of Solution Treatment on Laser Welding of Ti–6Al–4V Alloy Plate Produced through Wire Arc Additive Manufacturing
by Mingfang Xu, Yuhua Chen, Timing Zhang, Huaibo Deng and Di Ji
Metals 2020, 10(10), 1310; https://0-doi-org.brum.beds.ac.uk/10.3390/met10101310 - 30 Sep 2020
Cited by 3 | Viewed by 2076
Abstract
Laser beam welding (LBW) had been successfully applied to the welding of Ti–6Al–4V plates by wire arc additive manufacturing. The effects of solution treatment on microstructure, tensile properties, and microhardness after LBW in different deposition directions were studied. When the wire speeding was [...] Read more.
Laser beam welding (LBW) had been successfully applied to the welding of Ti–6Al–4V plates by wire arc additive manufacturing. The effects of solution treatment on microstructure, tensile properties, and microhardness after LBW in different deposition directions were studied. When the wire speeding was 3 m/min and travel speed was 0.36 m/min, the difference in mechanical properties was related to the anisotropy of the microstructure. The long columnar grain along the building direction could provide an α path with a large aspect ratio and high elongation. More grain boundaries are present along the scanning direction than in others, showing high strength. The microstructure of the as-deposited condition mainly consists of coarse prior-β grains, partial basket-weave structure, and numerous martensite α′ phase. In LBW without solution treatment, the microstructure of the welds mainly consists of a large amount of martensite α′ and a small amount of basket-weave structure. The weld had high strength and hardness. The tensile strength was between 930 and 970 MPa. The hardness was between 415 and 456 HV. The elongation ranged from 5% to 7%. Afterwards, the temperature was maintained at 870 °C for 2 h, cooled to 600 °C in the furnace for 1 h, and finally air cooled to room temperature. The martensite α′ was almost completely transformed into platelet α. The microstructure of the welds mainly consists of partial β grains, thimbleful martensite α′, and a large of α path. The strength and hardness of the welds were reduced. The tensile strength is between 910 and 950 MPa. The hardness was between 398 and 445 HV. However, the elongation was significantly improved, and the elongation ranged from 10% to 12%. Full article
(This article belongs to the Special Issue Laser Welding Innovations)
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Review

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34 pages, 7509 KiB  
Review
Pulsed Laser Welding Applied to Metallic Materials—A Material Approach
by Mariane Chludzinski, Rafael Eugenio dos Santos, Cristina Churiaque, Marta Ortega-Iguña and Jose Maria Sánchez-Amaya
Metals 2021, 11(4), 640; https://0-doi-org.brum.beds.ac.uk/10.3390/met11040640 - 14 Apr 2021
Cited by 16 | Viewed by 4152
Abstract
Joining metallic alloys can be an intricate task, being necessary to take into account the material characteristics and the application in order to select the appropriate welding process. Among the variety of welding methods, pulsed laser technology is being successfully used in the [...] Read more.
Joining metallic alloys can be an intricate task, being necessary to take into account the material characteristics and the application in order to select the appropriate welding process. Among the variety of welding methods, pulsed laser technology is being successfully used in the industrial sector due to its beneficial aspects, for which most of them are related to the energy involved. Since the laser beam is focused in a concentrated area, a narrow and precise weld bead is created, with a reduced heat affected zone. This characteristic stands out for thinner material applications. As a non-contact process, the technique delivers flexibility and precision with high joining quality. In this sense, the present review addresses the most representative investigations developed in this welding process. A summary of these technological achievements in metallic metals, including steel, titanium, aluminium, and superalloys, is reported. Special attention is paid to the microstructural formation in the weld zone. Particular emphasis is given to the mechanical behaviour of the joints reported in terms of microhardness and strength performance. The main purpose of this work was to provide an overview of the results obtained with pulsed laser welding technology in diverse materials, including similar and dissimilar joints. In addition, outlook and remarks are addressed regarding the process characteristics and the state of knowledge. Full article
(This article belongs to the Special Issue Laser Welding Innovations)
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