Special Issue "Welding Metallurgy"

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: 31 December 2021.

Special Issue Editor

Dr. Pasquale Russo Spena
E-Mail Website
Guest Editor
Department of Management and Production Engineering, Politecnico di Torino, Italy
Interests: advanced manufacturing processes; sheet forming; welding; mechanical joining; numerical modeling; process monitoring; aluminum and steel sheet; materials characterization; heat and surface treatments
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Special Issue Information

Dear Colleagues,

A large number of research activities concerning the welding of metal alloys are ongoing in many industrial fields. The ability to effectively weld traditional and innovative metals is mainly driven by the metallurgical phenomena that are involved in the joining process. These are not fixed factors for a given metal but also depend on joint shape and welding techniques.

Therefore, an understanding of welding metallurgy and of the influence of the welding processes on weld microstructure, mechanical properties, and appearance (e.g., defects, distortions due to residual stresses) is crucial to guarantee the performance of assembled parts and structures during the service, in any field.

This Special Issue aims to collect the most recent research on innovative and pioneering works in welding metallurgy that cover several aspects such as microstructure–property relationships of welds, welding techniques (fusion welding and solid-state welding), residual stress and distortion, post-weld heat treatment, numerical simulation of weld solidification and cooling, as well as corrosion phenomena.

Dr. Pasquale Russo Spena
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 papers will be 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 1800 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 metallurgy
  • weldability
  • ferrous and non-ferrous alloys
  • fusion welding
  • solid-state welding
  • microstructure–mechanical property relationships
  • residual stress and distortion
  • post-weld heat treatment
  • modeling and FEM simulation
  • corrosion

Published Papers (2 papers)

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Research

Open AccessArticle
Experimental and Numerical Studies on Preparation of Thin AZ31B/AA5052 Composite Plates Using Improved Explosive Welding Technique
Metals 2020, 10(8), 1023; https://doi.org/10.3390/met10081023 - 30 Jul 2020
Viewed by 694
Abstract
In this work, an improved explosive welding technique was investigated to fabricate a thin Mg/Al plate, where an additional thin aluminum sheet was used as a buffer layer between the explosive and the Al plate, and the Mg plate was rigidly constrained by [...] Read more.
In this work, an improved explosive welding technique was investigated to fabricate a thin Mg/Al plate, where an additional thin aluminum sheet was used as a buffer layer between the explosive and the Al plate, and the Mg plate was rigidly constrained by a steel plate to avoid excessive deformation. Moreover, the welding parameters were optimized using theoretical analysis and numerical simulation, and the interfacial behavior was simulated using the SPH method. The bonding properties of the achieved joints were investigated using microstructure observation and mechanical tests. It was concluded that this technique is an effective method for producing a thin Mg/Al composite plate. In both morphology observation and mechanical tests, an excellent bonding quality was confirmed. In addition, smoothed particle hydrodynamics (SPH) simulation revealed an extreme condition of local high temperature and plastic strain in the welding process, and the characteristic parameters of waves obtained using simulation are well congruous with the experiment. Full article
(This article belongs to the Special Issue Welding Metallurgy)
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Open AccessArticle
Comparative Study of Droplet Transfer Modes on Appearance, Microstructure, and Mechanical Properties of Weld during Pulsed GMAW
Metals 2020, 10(5), 611; https://doi.org/10.3390/met10050611 - 08 May 2020
Cited by 3 | Viewed by 773
Abstract
Droplet transfer plays a crucial role in welding stability and quality of pulsed gas metal arc weld (GMAW), referring to the process of heat and mass transition. In this work, the appearance, microstructure, microhardness, tensile properties, and impact toughness with three typical modes [...] Read more.
Droplet transfer plays a crucial role in welding stability and quality of pulsed gas metal arc weld (GMAW), referring to the process of heat and mass transition. In this work, the appearance, microstructure, microhardness, tensile properties, and impact toughness with three typical modes of droplet transfer in pulsed GMAW (ODMP: one drop per multiple pulses; ODPP: one drop per pulse; MDPP: multiple drops per pulse) were studied and compared. The results showed that the better welding appearance, the deeper penetration, and the less fume covered on the steel plate could be found during the ODPP welding process. At the same wire feeding speed and arc length, the average current was similar in ODPP and MDPP conditions. However, the average current in the ODMP condition was about 15 A larger than the other two, contributing to the higher heat input. Compared with MDPP and ODMP, the longest elongation and impact energy of the welded joint were found in the ODPP condition. Furthermore, the decrease of elongation and impact toughness in the ODMP condition might result from the higher heat input and the coarsen microstructure, like the proeutectoid ferrite and ferrite side plate. Full article
(This article belongs to the Special Issue Welding Metallurgy)
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