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

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

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 1356

Special Issue Editors

Dr. Murali Mohan Cheepu

E-Mail Website
Guest Editor
1. Welding Research Institute, Department of Materials System Engineering, Pukyong National University, Busan 612-022, Republic of Korea
2. STAR WELDS Inc., Busan 612-022, Republic of Korea
Interests: welding and joining; additive manufacturing; welding filler materials development; welding process design; automation; digitalization; rapid tooling; machine learning; AI
Special Issues, Collections and Topics in MDPI journals
Dr. Katakam Sivaprasad

E-Mail Website
Guest Editor
Department of Metallurgical and Materials Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, India
Interests: super alloys; additive manufacturing; welding; characterization of strategic materials; high-entropy alloys; creep; forming
Special Issues, Collections and Topics in MDPI journals
Mr. Venkata Charan Kantumuchu

E-Mail Website
Guest Editor Assistant
1. Department of Manufacturing, Bradley University, Peoria, IL, 61625, USA
2. Global Quality Director at Electrex Inc., Hutchinson, Kansas, MO, USA
Interests: fabrication; welding; additive manufacturing; quality control; quality assurance; lean manufacturing; operational excellence; challenges and limitations of 3DP and welding; AI; ML

Special Issue Information

Dear Colleagues,

The demand for advanced manufacturing processes to fabricate metallic materials is increasing on a daily basis for a wide range of applications, ranging from utensils to space industries. Welding is still a popular fabrication technique for the joining of several parts into a larger component. Recently, technology has advanced in the shipbuilding, defense, and space industries, as well as within other industries where welding is heavily involved. Although welding is widely used in a variety of applications, it has yet to be fully automated. As a result, there is, globally, a severe shortage of welders. However, in some cases where welding is difficult to apply for complex parts, additive manufacturing can be used to produce near net shapes. Various components, ranging in size from small to large complex parts, can be deposited using additive manufacturing. Hybrid manufacturing processes, which combine welding and additive manufacturing, are also in a high demand for a variety of applications.

For this Special Issue in Metals, we welcome reviews and articles from scientists, researchers, those within the industry, and engineers in the areas of welding and additive manufacturing. Additionally, we also invite those in the areas of machine learning, artificial intelligence, IoT in welding and AM, Industry 5.0, biomedical, hybrid manufacturing, process modeling, process technology developments, properties, and applications of welding and additive manufacturing to contribute to our Special Issue.

Dr. Murali Mohan Cheepu
Dr. Katakam Sivaprasad
Guest Editors

Venkata Charan Kantumuchu
Guest Editor Assistant

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

  • welding
  • additive manufacturing/3D printing
  • hybrid manufacturing
  • metallurgy
  • mechanical properties
  • machine learning
  • artificial intelligence
  • biomedical
  • finite elemental modeling
  • residual stresses
  • cladding
  • quality and NDT

Published Papers (1 paper)

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Research

19 pages, 14431 KiB  
Article
A Contribution to the Analysis of the Effects of Pulsed Current in GTAW Welding of 1-mm-Thick AISI 304 Sheets
by Jair Carlos Dutra, Kaue Correa Riffel, Regis Henrique Gonçalves e Silva and Antonio Jose Ramirez
Metals 2023, 13(8), 1387; https://doi.org/10.3390/met13081387 - 01 Aug 2023
Viewed by 928
Abstract
GTAW welding with pulsed current has been misinterpreted in some of the classic literature and scientific articles. General conclusions are presented, stating that its use provides greater penetration compared to the use of constant current and that the simple pulsation of the current [...] Read more.
GTAW welding with pulsed current has been misinterpreted in some of the classic literature and scientific articles. General conclusions are presented, stating that its use provides greater penetration compared to the use of constant current and that the simple pulsation of the current promotes beneficial metallurgical effects. Therefore, this manuscript presents a critical analysis of this topic and adopts the terminology of thermal pulsation for the situation where the weld undergoes sensitive effects, regarding grain orientation during solidification. For comparison purposes, an index called the form factor (ratio between the root width and the face width of the weld bead) is adopted. It is shown that the penetration of a welding with pulsed current can be worse than constant current depending on the formulation of the adopted procedure. Moreover, metallurgical effects on solidification, such as grain orientation breakage, only occur when there is adequate concatenation between the pulsation frequency and the welding speed. Finally, a thermal simulation of the process showed that the pulsation frequency limits the welding speed so that there is an overlap of the molten pool in each current pulse, and continuity of the bead is obtained at the root. For frequencies of 1 Hz and 2.5 Hz, the limit welding speed was 3.3 mm/s and 4.1 mm/s, respectively. Full article
(This article belongs to the Special Issue Welding and Additive Manufacturing of Metallic Materials)
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