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Metals
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Advanced Studies in Metal Joining
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Advanced Studies in Metal Joining

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

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 9822

Special Issue Editor

Prof. Dr. Huihuan Ma

E-Mail Website
Guest Editor
School of Civil Engineering, Sun Yat-sen University, Guangzhou 510120, China
Interests: civil engineering; metal joining; aluminum alloys
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The joint system is the key part of steel and aluminum constructions. The performance of the joint system is one of the crucial factors affecting the safety of the whole structure. With the development of science and technology, the materials that make up these joints and the production modes of these joint are changing fast. Meanwhile, new analysis methods for joint systems have been proposed, and tests for studying joint performance are widely carried out. We present this Special Issue entitled “Advanced Studies in Metal Joining". The purpose of this Special Issue is to collate information about new materials used for joints, new production methods of these joints (such as 3D printing technology), and new analysis methods or testing technologies to assess joint performance.

Dr. Huihuan Ma
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

  • steel joint
  • aluminum joint
  • 3D technology for joints
  • static analysis
  • dynamic analysis
  • supporting joint

Published Papers (5 papers)

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Research

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12 pages, 9036 KiB  
Article
The Effect of Nanostructured Functional Ceramics Additives on the Properties of Welding Electrodes
by Saidov Mannapovich Rustam, Rakhimov Khakimovich Rustam and Kamel Touileb
Metals 2023, 13(11), 1849; https://doi.org/10.3390/met13111849 - 4 Nov 2023
Viewed by 999
Abstract
The present work aimed to develop a new coated electrode weld based on ceramic materials. Photocatalysts of nanostructured functional ceramics (PNFCs) were synthesized by means of concentrated solar radiation on ceramic materials. This new process allows the efficient conversion of the energy of [...] Read more.
The present work aimed to develop a new coated electrode weld based on ceramic materials. Photocatalysts of nanostructured functional ceramics (PNFCs) were synthesized by means of concentrated solar radiation on ceramic materials. This new process allows the efficient conversion of the energy of the primary source into pulsed radiation, through the adjustable and judicious choice of parameters. The photocatalysts also showed high activity when they were introduced into an electrode coating. The main problem is the complexity of the production of NFC photocatalysts on an industrial scale. A new method was developed for producing ZB-1-grade NFC catalysts using conventional technology, with subsequent activation via pulsed radiation generated by functional ceramics. The results of the addition of NFC photocatalysts obtained using this technology on the welding and technological properties of welding electrodes of the MR-3 brand are presented. The introduction of 1% to 8% NFC of the ZB-1 grade into the coating enhanced the stability of arc burning (Lbla) and increased the diameter of the weld point (ødp.). Moreover, the addition of 1% to 8% NFC of the ZB-1 brand into the coating contributed to a reduction in the losses factor for waste and splashing of electrode metal (ψ) leading to a reduction in the height of the visor at the end of the electrode (hk). Full article
(This article belongs to the Special Issue Advanced Studies in Metal Joining)
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15 pages, 11288 KiB  
Article
Testing and Numerical Simulation of the Shear Resistance of Blind-Bolted Aluminum Connections
by Yuqi Jiang, Huihuan Ma, Zhiming Zhang and Peng Cheng
Metals 2023, 13(8), 1337; https://doi.org/10.3390/met13081337 - 26 Jul 2023
Viewed by 938
Abstract
Due to their high bending stiffness, high torsional stiffness, and high local stability, rectangular section members of Al alloy space structures are frequently utilized as load-bearing elements. However, the joint construction is more complex because of the closed cross-section. To join rectangular section [...] Read more.
Due to their high bending stiffness, high torsional stiffness, and high local stability, rectangular section members of Al alloy space structures are frequently utilized as load-bearing elements. However, the joint construction is more complex because of the closed cross-section. To join rectangular section members without drilling holes in them, a variety of blind bolts that can be placed and fastened on one side have been devised. The blind bolts researched in this paper is known as BOM bolt. The shear resistance of BOM-bolted Al alloy connections is investigated using shear testing and finite element calculations of individual bolts and bolt groups. According to the test and numerical simulation results, the formulas for the compressive strength of the aluminum plate and the shear capacity reduction factor of BOM-bolted long connections are derived. Full article
(This article belongs to the Special Issue Advanced Studies in Metal Joining)
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18 pages, 6695 KiB  
Article
Use of Sn60Pb40 Solder in Resistance Element Soldering Technology
by Pavol Sejč, Branislav Vanko, Alexander Schrek and Zuzana Gábrišová
Metals 2023, 13(7), 1313; https://doi.org/10.3390/met13071313 - 22 Jul 2023
Viewed by 969
Abstract
This work presents a new technology for joining dissimilar materials, Resistance Element Soldering (RES). This technology is fundamentally based on Resistance Element Welding (REW) technology; the difference is that the presented RES uses a bimetallic element composed of a hard Cu shell and [...] Read more.
This work presents a new technology for joining dissimilar materials, Resistance Element Soldering (RES). This technology is fundamentally based on Resistance Element Welding (REW) technology; the difference is that the presented RES uses a bimetallic element composed of a hard Cu shell and a core made of Sn60Pb40 solder. The RES technology using the Cu/Sn60Pb40 bimetallic element was tested when joining a galvanized steel sheet (HX220BD-100MBO) to a thermoplastic (PMMA). The effect of the process parameters on the volume of the melted solder, the deformation of the element, and the structure of the soldered joint was investigated on the joints made. The final criterion for assessing the influence of the process parameters was the joint strength. Due to the low strength of PPMA, the maximum joint strength was determined on RES joints of galvanized steel sheet and aluminum. The results showed that, to ensure the joint strength at the level of the strength of the Sn60Pb40 solder used, a heat input of 952 J and a clamping force of 623 N are required. The mentioned parameters ensure the necessary conditions for the creation of a soldered joint with a galvanized steel sheet as well as the deformation of the bimetallic element to create a form-fit effect in the opening of the PMMA to create a mechanical connection. Full article
(This article belongs to the Special Issue Advanced Studies in Metal Joining)
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Review

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31 pages, 3433 KiB  
Review
Optimization of Bolted Joints: A Literature Review
by Dario Croccolo, Massimiliano De Agostinis, Stefano Fini, Muhammad Yasir Khan, Mattia Mele and Giorgio Olmi
Metals 2023, 13(10), 1708; https://doi.org/10.3390/met13101708 - 7 Oct 2023
Viewed by 4425
Abstract
Bolted joints are widely used in the aerospace and automotive industries due to their ease of assembly, disassembly and design flexibility. Optimizing threaded fasteners is essential to achieve uniform load distribution and minimize the number of bolts required, thereby reducing system cost and [...] Read more.
Bolted joints are widely used in the aerospace and automotive industries due to their ease of assembly, disassembly and design flexibility. Optimizing threaded fasteners is essential to achieve uniform load distribution and minimize the number of bolts required, thereby reducing system cost and weight. This review paper aims at summarizing the five optimization techniques available in the literature, including bolt layout, tightening strategies, tightening sequences, bolt size, and stresses. The purpose is to emphasize the importance of optimizing bolted joints via the proper selection of materials, geometry, patterns, and bolt sizes, to obtain efficient joints with low assembly time while maintaining strength. Full article
(This article belongs to the Special Issue Advanced Studies in Metal Joining)
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46 pages, 17297 KiB  
Review
A Review of Orbital Friction Stir Welding
by Francisco B. Ferreira, Igor Felice, Isaque Brito, João Pedro Oliveira and Telmo Santos
Metals 2023, 13(6), 1055; https://doi.org/10.3390/met13061055 - 31 May 2023
Cited by 4 | Viewed by 2056
Abstract
Friction stir welding is a solid-state joining process widely used in several industrial applications. One of its variants, orbital friction stir welding, is of key importance in fundamental industries such as oil and gas and aerospace. For orbital friction stir welding, there is [...] Read more.
Friction stir welding is a solid-state joining process widely used in several industrial applications. One of its variants, orbital friction stir welding, is of key importance in fundamental industries such as oil and gas and aerospace. For orbital friction stir welding, there is a need to develop not only new process parameters but also tools and ancillary mechanisms that can ensure sound, high-performing joints are obtained. This review assesses the current state of orbital friction stir welding, highlighting several key aspects related to this technology. Full article
(This article belongs to the Special Issue Advanced Studies in Metal Joining)
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