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Materials
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Innovation in Joining and Welding Processes
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Innovation in Joining and Welding Processes

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 2720

Special Issue Editors

Dr. Chiara Mandolfino

E-Mail Website
Guest Editor
Department of Mechanical, Energy, Management and Transportation Engineering, Polytechnic School, University of Genoa, 16145 Genoa, Italy
Interests: joining technologies; adhesive bonding; welding; composite materials; additive manufacturing; corrosion performance; laser processing and applications
Prof. Dr. Massimiliano Avalle

E-Mail Website
Guest Editor
DIME—Department of Mechanical, Energy, Management and Transportation Engineering Polytechnic School, University of Genoa, 16145 Genoa, Italy
Interests: materials characterization and modeling; design and optimization of AM structures; cellular materials
Special Issues, Collections and Topics in MDPI journals
Prof. Enrico Lertora

E-Mail Website
Guest Editor
Department of Mechanical, Energy, Management and Transportation Engineering, Polytechnic School, University of Genoa, 16145 Genoa, Italy
Interests: welding; materials; friction stir welding; joining; adhesive bonding

Special Issue Information

Dear Colleagues,

Increasing endeavor for the effective and green use of energy has led to the development of new materials and processing technologies. These materials, mainly designed to lighten structures, can be very different in nature. When designing elements that fit the characteristics of these materials, the use of hybrid components consisting of dissimilar materials cannot be disregarded. Joining processes have therefore necessarily had to evolve and innovate for the production of multi-material joints. Despite these already being utilized in widespread research activities, gaps of information still exist and future trends need to be highlighted to provide indications for the application of these technologies in various industrial fields.

This Special Issue aims to provide a framework for identifying the innovations in joining and welding processes based on these principles, evaluating potentials and drawbacks. Additionally, actual industrial applications of these processes will be welcome.

Therefore, the scope of this Special Issue focuses on innovation in the field of joining and welding processes of materials. The topics of interest include, but are not limited to, the following:

  • Innovative welding processes;
  • Development of adhesive bonding processes, concerning all manufacturing phases;
  • Original applications of traditional joining technologies;
  • Hybrid joining techniques;
  • Forward-looking use of joining technologies on dissimilar joints.

We would like to invite you to submit original research articles and reviews related to any of the topics mentioned above.

Dr. Chiara Mandolfino
Prof. Dr. Massimiliano Avalle
Prof. Enrico Lertora
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. 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

  • innovative welding and joining processes
  • adhesive bonding
  • hybrid joining
  • dissimilar joints
  • industrial applications of innovative joining

Published Papers (1 paper)

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Research

14 pages, 8476 KiB  
Article
Elucidating the Effect of Step Cooling Heat Treatment on the Properties of 2.25 Cr–1.0 Mo Steel Welded with a Combination of GMAW Techniques Incorporating Metal-Cored Wires
by Subhash Das, Jay Vora, Vivek Patel, Joel Andersson, Danil Yurievich Pimenov and Khaled Giasin
Materials 2021, 14(20), 6033; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14206033 - 13 Oct 2021
Cited by 8 | Viewed by 1900
Abstract
The prospect of using metal-cored wires instead of solid wires during gas metal arc welding (GMAW) of 2.25 Cr–1.0 Mo steels embraces several challenges. The in-service requirements for the equipment made up of these steels are stringent. The major challenge faced by the [...] Read more.
The prospect of using metal-cored wires instead of solid wires during gas metal arc welding (GMAW) of 2.25 Cr–1.0 Mo steels embraces several challenges. The in-service requirements for the equipment made up of these steels are stringent. The major challenge faced by the manufacturers is temper embrittlement. In the current study, the temper embrittlement susceptibility of the welded joint was ascertained by subjecting it to step cooling heat treatment. A 25 mm thick 2.25 Cr–1.0 Mo weld joint was prepared using a combination of the regulated metal deposition (RMD) and GMAW processes incorporating metal-cored wires. After welding the plates were exposed to post-weld heat treatment followed by a rigorous step cooling heat treatment prescribed by API standards. The temper embrittlement susceptibility of the weld joint was ascertained by Bruscato X-factor as well as by formulating ductile-to-brittle transition temperature (DBTT) curves by carrying out the impact toughness testing at various temperatures. Detailed microscopy and hardness studies were also carried out. It was established from the study that the X-factor value for the welded joint was 15.4. The DBTT for the weld joint was found to occur at −37 °C which was well below 10 °C. Optical microscopy and scanning electron microscopy indicated the presence of carbides and the energy dispersive X-ray spectrometry studies indicated the presence of chromium and manganese-rich carbides along with the presence of sulfur near the grain boundaries. This study establishes a base for the usage of metal-cored wires particularly in high temperature and pressure application of Cr–Mo steels. Full article
(This article belongs to the Special Issue Innovation in Joining and Welding Processes)
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