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Metals
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Welding and Joining Technology of Dissimilar Metal Materials
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Welding and Joining Technology of Dissimilar Metal Materials

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

Deadline for manuscript submissions: 31 October 2025 | Viewed by 1130

Special Issue Editor

Dr. Sizhe Niu

E-Mail Website
Guest Editor
School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
Interests: welding; joining; dissimilar materials; high-entropy alloy; high-entropy nugget; microstructure evolution; mechanical performance
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Dissimilar material structures could realize a combination of dissimilar materials with excellent performance, which improves flexibility in design and production and meets the demand for function and properties in modern engineering structures. These structures have been widely used in many fields due to their higher technological and economic value. Therefore, the reliable joining of dissimilar materials is becoming increasingly important. Nevertheless, the great difference in physical and chemical properties between dissimilar materials poses a huge challenge in achieving reliable joining.

Advances in the joining process of dissimilar materials, including the control and characterization of materials in all process steps and their final performance analysis, are within the scope of this Special Issue. For example, the welding of dissimilar metal materials will inevitably produce a transition layer with a different microstructure and properties from the base metal. Due to the significant differences in element properties, physical properties, chemical properties, and other aspects of dissimilar metals, compared with the welding of the same material, the welding of dissimilar materials is much more complicated than that of the same material in terms of the welding mechanism and operation technology.

In this Special Issue, we welcome articles that focus on dissimilar material joining processes and ways to improve joint performance. The fully controllable, fast, and low-cost process is of particular interest, with a high potential for implementation in the joining of dissimilar materials, which enables the production of high-performance products.

Dr. Sizhe Niu
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 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
  • joining
  • dissimilar materials
  • microstructure evolution
  • mechanical performance
  • failure mode transition

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Published Papers (2 papers)

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Research

24 pages, 20493 KiB  
Article
Enhancing High-Temperature Durability of Aluminum/Steel Joints: The Role of Ni and Cr in Substitutional Diffusion Within Intermetallic Compounds
by Masih Bolhasani Hesari, Reza Beygi, Tiago O. G. Teixeira, Eduardo A. S. Marques, Ricardo J. C. Carbas and Lucas F. M. da Silva
Metals 2025, 15(4), 465; https://doi.org/10.3390/met15040465 - 20 Apr 2025
Abstract
The automotive and aerospace industries increasingly rely on lightweight, high-strength materials to improve fuel efficiency, making the joining of dissimilar metals such as aluminum and steel both beneficial and essential. However, a major challenge in these joints is the formation of brittle intermetallic [...] Read more.
The automotive and aerospace industries increasingly rely on lightweight, high-strength materials to improve fuel efficiency, making the joining of dissimilar metals such as aluminum and steel both beneficial and essential. However, a major challenge in these joints is the formation of brittle intermetallic compounds (IMCs) at the interface, even when using low heat-input solid-state welding methods like friction stir welding (FSW). Furthermore, IMC growth at elevated temperatures significantly limits the service life of these joints. In this study, an intermediate layer of stainless steel was deposited on the steel surface prior to FSW with aluminum. The resulting Al–Steel joints were subjected to heat treatment at 400 °C and 550 °C to investigate IMC growth and its impact on mechanical strength, with results compared to conventional joints without the intermediate layer. The intermediate layer significantly suppressed IMC formation, leading to a smaller reduction in mechanical strength after heat treatment. Joints with the intermediate layer achieved their highest strength (350 MPa) after heat treatment at 400 °C, while conventional joints exhibited their highest strength (225 MPa) in the as-welded condition. At 550 °C, both joint types experienced a decline in strength; however, the joint with the intermediate layer retained a strength of 100 MPa, whereas the conventional joint lost its strength entirely. This study provides an in-depth analysis of the role of IMC growth in joint strength and demonstrates how the intermediate layer enhances the thermal durability and mechanical performance of Al–Steel joints, offering valuable insights for their application in high-temperature environments. Full article
(This article belongs to the Special Issue Welding and Joining Technology of Dissimilar Metal Materials)
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13 pages, 7079 KiB  
Article
A Study of the Performance of Dissimilar Pulsed-Laser-Welded JSC590R/JAC980YL Steel Joints of Differential Thickness
by Rui Zhang, Qiaobo Feng, Chunliang Wang, Shuai Tian, Sizhe Niu and Ming Lou
Metals 2024, 14(12), 1352; https://doi.org/10.3390/met14121352 - 27 Nov 2024
Viewed by 718
Abstract
To reveal the correlation between the mechanical properties of JSC590R/JSC980YL steel pulse-laser-welded joints and welding parameters, this study adopts the response surface analysis test method to determine the welding parameters, and examined the macroscopic morphology, microstructure, microhardness, and tensile properties of the cross-section [...] Read more.
To reveal the correlation between the mechanical properties of JSC590R/JSC980YL steel pulse-laser-welded joints and welding parameters, this study adopts the response surface analysis test method to determine the welding parameters, and examined the macroscopic morphology, microstructure, microhardness, and tensile properties of the cross-section of the welded joints. The results revealed that the key factors influencing welded joints quality, in descending order of importance, are distance to focus, welding speed, and single-pass heat input. The interaction between these factors is extremely significant. The weld zone of the joints is primarily composed of lath martensite, while the heat-affected zone is composed of ferrite, martensite, carburite, tempered martensite, and residual austenite. The optimized welding parameters align with actual expectations, yielding an average engineering stress of 616.9 MPa for the joint. Notably, the fracture area shifts from the heat-affected zone of JSC590R to the base material. Full article
(This article belongs to the Special Issue Welding and Joining Technology of Dissimilar Metal Materials)
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