materials-logo

Journal Browser

Journal Browser

Advances on Welded Joints: Microstructure and Mechanical Properties

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 April 2025) | Viewed by 2480

Special Issue Editors


E-Mail Website
Guest Editor
Dipartimento di Meccanica, Matematica e Management, Politecnico di Bari, Bari, Italy
Interests: experimental mechanics; residual stress; additive manufacturing; crack propagation

E-Mail Website
Guest Editor
Department of Engineering for Innovation, Università del Salento, 73100 Lecce, Italy
Interests: microstructure; mechanical behavior of metal materials; material characterization; mechanical testing; metal materials; alloy; coatings; welding; manufacturing process mechanics; heat treatment; corrosion; fractographic analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Advances in welded joints continue to play a critical role in various industries, including manufacturing, construction, and the automotive industry. While welding is a longstanding and extensively employed joining method, various issues persist, e.g., the presence of intermetallic materials, geometrical discontinuities, etc., which have constrained its widespread adoption. Nevertheless, researchers and engineers continue to innovate to further enhance the microstructure and mechanical properties of welded joints in order to meet the evolving demands of modern applications.

Additionally, in recent decades, new welding technologies (e.g., FSW, hybrid techniques, etc.) that allow dissimilar or “non-weldable” materials to be joined have been developed. These innovative joints require in-depth study in order to evaluate their reliability and durability under real service conditions.

The aim of this Special Issue is to collect original contributions focusing on the microstructural assessment and mechanical properties characterization of welded joints, the procedure used to design them, and the development of new materials that expand the applicative potential of welding. Topics of interest include, but are not limited to, the following: the characterization of welded joints, fatigue performance, crack propagation, experimental investigations, simulations and analyses of welded joints, the effect of residual stresses, non-destructive testing (NDT) and in situ monitoring.

Dr. Vincenzo Moramarco
Dr. Gilda Renna
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

  • welded joints
  • dissimilar materials
  • residual stress
  • crack propagation
  • modelling
  • mechanical characterization
  • non-destructive methods
  • fatigue, microstructure and quality control
  • welding technology

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

16 pages, 7246 KiB  
Article
Welding of S960QL High-Strength Steel by the Manual–Automated MAG Technique—A Study of Mechanical Properties, Residual Stresses and Fracture Mechanisms in the Heat-Affected Zone
by Tomasz Ślęzak
Materials 2024, 17(23), 5792; https://doi.org/10.3390/ma17235792 - 26 Nov 2024
Cited by 1 | Viewed by 945
Abstract
This paper presents results of investigations of a V-type welded joint made of S960QL high-strength steel made using a mixed technique: the root was welded manually and the face automatically. Although high-strength steels have been available on the market for many years, they [...] Read more.
This paper presents results of investigations of a V-type welded joint made of S960QL high-strength steel made using a mixed technique: the root was welded manually and the face automatically. Although high-strength steels have been available on the market for many years, they are still the subject of research due to their increasingly widespread usage. For this reason, detailed investigations of welded joints of S960QL steel were carried out in terms of microstructure, microhardness, impact toughness and residual stresses, in order to expand knowledge in this area. The obtained results made it possible to determine their changes in heat-affected zone (HAZ) as a function of the distance from the fusion line. One of the most important findings is that during the tensile tests, the rupture occurred in the sub-zone of HAZ, which is characterized by increased strength and low ductility. This was due to the fact that an unfavorable residual stress distribution occurred in this area, causing the highest initial local strain of the material. Furthermore, different fracture mechanisms, both ductile and brittle, as well as mixed, were observed and described in detail for each sub-zone of the HAZ and in the weld. Full article
(This article belongs to the Special Issue Advances on Welded Joints: Microstructure and Mechanical Properties)
Show Figures

Figure 1

13 pages, 9139 KiB  
Article
Effect of Fusion Boundary Microstructure on Flow-Accelerated Corrosion Cracking
by Yajing Wang, Zhe Lyu, Zhisheng Wu and Leijun Li
Materials 2024, 17(9), 2026; https://doi.org/10.3390/ma17092026 - 26 Apr 2024
Viewed by 949
Abstract
Flow-accelerated corrosion (FAC) preferentially attacks the downstream heat-affected zone of the root-pass weld in steam pipe systems. A detailed characterization identifies the fusion boundary as the initiation location for the attack. Alloying elements are found depleted along the weld fusion boundary, and multiple [...] Read more.
Flow-accelerated corrosion (FAC) preferentially attacks the downstream heat-affected zone of the root-pass weld in steam pipe systems. A detailed characterization identifies the fusion boundary as the initiation location for the attack. Alloying elements are found depleted along the weld fusion boundary, and multiple welding thermal cycles and repetitive austenite-to-ferrite phase transformations result in an increased proportion of grains with Goss {110}<001> texture along the fusion boundary. The synergistic effects of chemical segregation and the Schmid factor may contribute to the preferential initiation of FAC cracks along the root weld fusion boundary, making it the weakest link for FAC attack in steam pipe girth welds. Full article
(This article belongs to the Special Issue Advances on Welded Joints: Microstructure and Mechanical Properties)
Show Figures

Figure 1

Back to TopTop