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Metals
Special Issues
Welding and Additive Manufacturing of Metals
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Welding and Additive Manufacturing of Metals

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Additive Manufacturing".

Deadline for manuscript submissions: 31 January 2026 | Viewed by 1019

Special Issue Editors

Dr. Javad Karimi

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Guest Editor
Institute of Materials Engineering, Technische Universität Bergakademie Freiberg, Freiberg, Germany
Interests: additive manufacturing process development; metallic additive manufacturing; material characterization
Dr. Tatevik Minasyan

E-Mail Website
Guest Editor
1. Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Tallinn, Estonia
2. Multi-Scale Additive Manufacturing Laboratory, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada
Interests: additive manufacturing; laser powder bed fusion; metals and alloys; superalloys; metal- and ceramic-matrix composites; powder synthesis; brazing of alloys
Dr. Ramin Rahmani

E-Mail Website
Guest Editor
CiTin‒Centro de Interface Tecnológico Industrial, Arcos de Valdevez, Portugal
Interests: additive manufacturing; powder metallurgy; selective laser melting; spark plasma sintering; laser powder bed fusion; porous structures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Additive manufacturing has seen significant growth in recent years and is becoming the manufacturing technology of the future, enabling the fabrication of the most complex objects with a wide range of applications in various industries. Welding is still one of the most widely used techniques for joining metallic materials. The performance and reliability of metallic parts fabricated via additive manufacturing and welding technologies highly depend on the process, weldability, microstructural and mechanical properties, and defects. To improve the reliability, technological readiness level, and quality and reduce defects, it is vital to understand, control, and characterize welded and additively manufactured metallic parts for various applications.

This Special Issue aims to provide the readership of Metals with the most up-to-date research in welding and additive manufacturing. Appropriate topics include, but are not limited to, the following: advanced material design; microstructural and mechanical characterization; processing–property relationships; computational modeling and simulation; digitalization and Industry 4.0; and sustainability. We welcome reviews and articles from scientists, researchers, those within the industry, and engineers in the areas of welding and additive manufacturing.

Dr. Javad Karimi
Dr. Tatevik Minasyan
Dr. Ramin Rahmani
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. 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

  • additive manufacturing
  • welding
  • material design
  • microstructure
  • mechanical properties
  • sustainlibilty
  • in situ monitoring
  • nondestructive testing
  • welding automation and robotics

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Published Papers (2 papers)

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Research

18 pages, 5211 KB  
Article
Data-Driven Performance-Oriented Rapid Process Optimization for 316 Stainless Steels Prepared by Laser Powder Bed Fusion
by Junyan Zhu, Meiling Jiang, Guoliang Huang and Ke Huang
Metals 2025, 15(9), 968; https://doi.org/10.3390/met15090968 (registering DOI) - 30 Aug 2025
Viewed by 118
Abstract
In this work, a rapid process optimization framework for laser powder bed fusion (LPBF) based on a high-throughput mechanical testing platform and data analytical methods was proposed and validated. This framework enables the efficient building of a process–properties database and analytical model, as [...] Read more.
In this work, a rapid process optimization framework for laser powder bed fusion (LPBF) based on a high-throughput mechanical testing platform and data analytical methods was proposed and validated. This framework enables the efficient building of a process–properties database and analytical model, as well as the fine-tuning of customized mechanical properties. Unlike previous approaches that focused primarily on density as the main optimization target, this method directly aligns the mechanical properties by systematically varying the LPBF process parameters (e.g., laser power, scanning speed, etc.). Tensile specimens in the high densification range were prepared and tested using a high-throughput mechanical property test platform (HTP). Following this, an analytical model correlating tensile properties and process parameters was developed using response surface methodology (RSM). Based on this model recommendation, a specimen with a densification of 99.46% and a yield strength (YS) of 524.74 MPa was achieved, with only a 3.72% variation compared to the predicted value (526.08 MPa), confirming the model’s reliability. A comprehensive analysis of relative density, phase content and microstructure was conducted, comparing them with a specimen exhibiting lower properties. This study provides an effective method for the rapid evaluation and optimization of LPBF processing parameters for fine-tuning customized mechanical properties. Full article
(This article belongs to the Special Issue Welding and Additive Manufacturing of Metals)
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23 pages, 7586 KB  
Article
Multi-Scale Mechanical Anisotropy and Heat Treatment Effects in Additively Manufactured AlSi10Mg
by Aikaterini Argyrou, Leonidas Gargalis, Leonidas Karavias, Evangelia K. Karaxi and Elias P. Koumoulos
Metals 2025, 15(8), 890; https://doi.org/10.3390/met15080890 - 8 Aug 2025
Viewed by 384
Abstract
This study investigates the combined effects of build planes and heat treatments on the micro- and nanoscale mechanical properties of additively manufactured AlSi10Mg alloy. The hardness and elastic modulus were examined across two principal planes, XY and XZ, under three conditions: as-built (AB), [...] Read more.
This study investigates the combined effects of build planes and heat treatments on the micro- and nanoscale mechanical properties of additively manufactured AlSi10Mg alloy. The hardness and elastic modulus were examined across two principal planes, XY and XZ, under three conditions: as-built (AB), after solution annealing followed by water quenching (SA), and artificially aged after solution annealing (SA&AA). The results reveal that hardness is significantly affected by heat treatment, decreasing after SA and partially recovering upon subsequent artificial aging (SA&AA), while remaining largely unaffected by build planes, with average values differing by less than 2%. In contrast, the elastic modulus demonstrates a clear anisotropy, correlated with the microstructural changes from both additive manufacturing and thermal post-processing. The XY plane initially shows a modulus up to 29% higher than the XZ plane. However, after aging, the values of both planes converge to similar levels. While average values suggest general trends, localized measurements reveal notable spatial heterogeneity in both the hardness and elastic modulus—particularly after thermal treatments—arising from microstructural evolutions. These findings highlight the complex interplay between orientation and thermal history, underscoring that the mechanical performance of AlSi10Mg is governed by the synergistic effects that influence anisotropy and local mechanical behavior. Full article
(This article belongs to the Special Issue Welding and Additive Manufacturing of Metals)
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