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Welding, Joining, and Additive Manufacturing of Metals and Alloys (Third...
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Welding, Joining, and Additive Manufacturing of Metals and Alloys (Third Edition)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: 20 March 2026 | Viewed by 2190

Special Issue Editors

Dr. Damjan Klobcar

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia
Interests: additive manufacturing; characterisation of weld joints; ultrasonic welding; laser welding; friction stir welding; friction welding; resistance spot welding; arc welding technologies; adhesive bonding; vibration assisted welding and additive manufacturing; thermal and mechanical post-processing
Special Issues, Collections and Topics in MDPI journals
Dr. Drago Bračun

E-Mail Website
Guest Editor
Laboratory for Mechatronics, Production Systems and Automation, Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia
Interests: vision systems for industrial quality inspection; automation; process monitoring and improvement; AI
Special Issues, Collections and Topics in MDPI journals
Dr. Tomaž Vuherer

E-Mail
Guest Editor
Laboratory for Welding, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
Interests: characterisation of weld joints; instrumented charpy test; fatique; fracture mechanics of the weld joints; fatigue crack growth test; friction stir welding; friction welding; resistance spot welding; arc welding technologies; residual stress
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The constant development of new materials and products also promotes the research and development of welding, joining, and build-up welding technologies, as well as additive manufacturing technologies. These investigations are multidisciplinary and encompass processes and their automation, monitoring and control, materials, weldability and joinability of materials and alloys, product and joint design, and advanced characterization and numerical simulations to comprehensively understand physical and metallurgical phenomena. A successful understanding of these phenomena enables the development of solutions to overcome these problems. This Special Issue aims to report the results of basic and applied research, as well as case studies, in the fields of weldability and joinability of materials, additive manufacturing, automation, process improvement, and advanced characterization.

The potential topics for the Special Issues include, but are not limited to, the following:

Micro and nano joining.

Diffusion bonding.

Adhesive bonding.

Hybrid welding and additive manufacturing.

Laser welding.

Welding with mechanical energy.

Weldability of similar and dissimilar materials.

Advanced material characterization.

Residual stress and distortion.

Numerical modeling and simulation.

Additive manufacturing processes (DED, powder bead fusion, binder jetting, etc.).

Additive manufacturing of new materials, multi-materials, and functionally graded materials.

Improvement in materials using weld surfacing and additive manufacturing.

Repair welding and repair additive manufacturing of products.

In situ processing and post-processing in additive manufacturing or welding.

Advanced material characterization.

Fatigue of joints and AM parts.

Destructive and non-destructive testing of joints and AM parts.

Process automation, monitoring, and control.

Monitoring systems, vision, automation, and quality inspection.

Application of Artificial Intelligence in process planning, monitoring and control.

Dr. Damjan Klobcar
Dr. Drago Bračun
Dr. Tomaž Vuherer
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 250 words) can be sent to the Editorial Office for assessment.

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. Materials is an international peer-reviewed open access semimonthly 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

  • welding and joining technologies
  • brazing and soldering
  • additive manufacturing
  • adhesive bonding
  • weldability of materials

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Related Special Issue

Published Papers (3 papers)

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Research

29 pages, 20387 KB  
Article
Effects of Equal Channel Angular Pressing on the Microstructure and Mechanical Properties of Explosion-Welded Al-Cu Bimetallic Plates
by Krzysztof Żaba, Kinga Ortyl, Ondřej Hilšer, Martin Pastrnak, Łukasz Kuczek, Ilona Różycka, Paweł Pałka, Aleksander Gałka and Tomasz Trzepieciński
Materials 2025, 18(22), 5080; https://doi.org/10.3390/ma18225080 - 8 Nov 2025
Viewed by 451
Abstract
Explosive welding technology is crucial for the production of large-area plates composed of materials with varying plastic and physical properties. Severe plastic deformation processes increase the mechanical strength of the plates by refining grains and increasing dislocation density. The aim of the research [...] Read more.
Explosive welding technology is crucial for the production of large-area plates composed of materials with varying plastic and physical properties. Severe plastic deformation processes increase the mechanical strength of the plates by refining grains and increasing dislocation density. The aim of the research presented in this paper was to analyze the effect of Equal Channel Angular Pressing (ECAP) on the mechanical properties and microstructure of an Al/Cu (EN AW-1050/Cu-ETP) bimetallic plate produced by the explosive welding technology. The ECAP process was carried out at room temperature. The ECAP experiments consisted of 1–3 passes using a die with a channel angle of 90°. The ram speed was 40 mm/min. The study also considered various sample cutting orientations (longitudinal, transverse) and various positions of the bimetallic sample in the die entry channel. Rotating the sample by an angle of 180° between consecutive passes was also considered. To achieve the research objective, static tensile tests, Vickers hardness tests at a load of 4.9 N, and microstructural analysis of the samples using scanning electron microscopy and energy dispersive spectroscopy were carried out. It was found that each subsequent pass in the ECAP process led to a gradual, severe change in the morphology of the Al/Cu interfacial transition layer. The orientation of the cutting plane of the samples was shown to have no effect on the hardness of the bimetallic material. Vickers hardness tests preceded by the ECAP process revealed a more uniform hardness distribution compared to the base material. The orientation of the Al/Cu plate layers in the ECAP die channel clearly influenced the character of the hardness distribution. Full article
(This article belongs to the Special Issue Welding, Joining, and Additive Manufacturing of Metals and Alloys (Third Edition))
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9 pages, 5251 KB  
Communication
Electrochemical Surface Modification of Laser Cladded Ni-Based Single Crystal Superalloy in NaNO3 Solution
by Jingbo Liu, Yongxin Liu, Xianqi Meng, Linfeng Tang, Xiaowei Lei and Nan Wang
Materials 2025, 18(21), 4967; https://doi.org/10.3390/ma18214967 - 30 Oct 2025
Viewed by 377
Abstract
Since mechanical processing can introduce stress in the sample, electrochemical dissolution has been utilized to attain shape accuracy in certain materials. However, this technique is rarely applied to laser-repaired Ni-based single-crystal superalloys. In this work, the transpassive dissolution behaviors of an additive manufacturing-repaired [...] Read more.
Since mechanical processing can introduce stress in the sample, electrochemical dissolution has been utilized to attain shape accuracy in certain materials. However, this technique is rarely applied to laser-repaired Ni-based single-crystal superalloys. In this work, the transpassive dissolution behaviors of an additive manufacturing-repaired Ni-based single crystal superalloy in a 10% NaNO3 solution were investigated by comparison with the substrate. A significant disparity in dissolution rates was found between the dendritic and interdendritic regions of the substrate, resulting in a rough surface. Conversely, the dissolution of the dendritic and interdendritic regions in the cladding structure occurred nearly simultaneously, leading to a high-quality, smooth surface. This behavior was attributed to the differences in phase dissolution preferences between the substrate and the cladding structure. It indicates that electrochemical dissolution is a promising method for achieving shape accuracy in laser-clad Ni-based single-crystal superalloys. Full article
(This article belongs to the Special Issue Welding, Joining, and Additive Manufacturing of Metals and Alloys (Third Edition))
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21 pages, 9175 KB  
Article
Optimizing Welding Sequence and Improving Welding Process for Marine Thick-Walled Circular Pipes
by Tao Ma, Mingguan Fan, Haipeng Miao, Wei Shang and Mingxin Yuan
Materials 2025, 18(17), 4128; https://doi.org/10.3390/ma18174128 - 2 Sep 2025
Viewed by 1071
Abstract
To reduce welding deformation during the automated welding of thick-walled pipes in shipbuilding and thereby improve welding quality, a segmented multi-layer multi-pass welding sequence optimization and process improvement strategy is proposed. Firstly, based on a welding model for thick-walled pipes, a multi-layer multi-pass [...] Read more.
To reduce welding deformation during the automated welding of thick-walled pipes in shipbuilding and thereby improve welding quality, a segmented multi-layer multi-pass welding sequence optimization and process improvement strategy is proposed. Firstly, based on a welding model for thick-walled pipes, a multi-layer multi-pass welding trajectory equation is established. A double-ellipsoidal moving heat source is adopted to design a circular multi-layer multi-pass double-ellipsoidal heat source model. Secondly, three circular pipe workpieces with different wall thicknesses are selected, and four segmented welding sequences are simulated using welding finite element analysis (FEA). Finally, based on the optimal segmented welding sequence, the welding process is improved, and optimal welding process parameters are determined based on deformation and residual stress analysis. The results of the segmented multi-layer multi-pass welding sequence optimization show that the skip-symmetric welding method yields the best results for thick-walled circular pipes. Compared to other welding sequences, it reduces welding deformation by an average of 6.50% and welding stress by an average of 5.37%. In addition, process improvement tests under the optimal welding sequence indicate that the best welding quality is achieved under the following conditions: for 10 mm thick pipes—200 A current, 24 V voltage, and 11.5 mm/s welding speed; for 15 mm thick pipes—215 A, 24.6 V, and 10 mm/s; and for 20 mm thick pipes—225 A, 25 V, and 11 mm/s. Full article
(This article belongs to the Special Issue Welding, Joining, and Additive Manufacturing of Metals and Alloys (Third Edition))
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