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Applied Sciences
Special Issues
Recent Advances in Materials Welding and Joining Technologies
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Recent Advances in Materials Welding and Joining Technologies

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 20 November 2024 | Viewed by 5765

Special Issue Editors

Dr. Lubos Kascak

E-Mail Website
Guest Editor
Department of Technologies, Materials and Computer Aided Production, Faculty of Mechanical Engineering, Technical University of Košice, Mäsiarska 74, 04001 Kosice, Slovakia
Interests: mechanical joining; clinching; resistance spot welding; adhesive bonding; hybrid joining
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Emil Spišák

E-Mail Website
Guest Editor
Department of Technologies, Materials and Computer Aided Production, Technical University of Kosice, 74 Mäsiarska, 04001 Kosice, Slovakia
Interests: sheet metal forming; mechanical joining; modeling and simulation of technological processes
Special Issues, Collections and Topics in MDPI journals
Dr. Jacek Mucha

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland
Interests: construction and operation of machines; technologies for the production of mechanical joints; analysis of the mechanical properties of joints; operation of plastic forming tools
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

At present, the material concepts used for various products vary considerably, but the common goal is the economic efficiency of production while maintaining customer requirements. Since complex products can consist of different types of ferrous and non-ferrous metals or the now increasingly used composite materials, the question arises not only of how to manufacture the parts of the assembly but also how to combine them into a functional whole and maintain the required quality. Therefore, research in the area of joining materials of different grades, thicknesses, or combinations is very important. The main goal in the field of joining technologies is to develop and offer a comprehensive solution for joining new materials with various mechanical properties and chemical compositions to improve the economy of the production process.

This Special Issue includes original research and review studies regarding the aspects of joining technologies for various types of materials: ferrous and non-ferrous metals, composites, hybrid materials, and other modern materials. The Speical Issue will provide a platform for presenting the latest scientific knowledge in the field of joining materials using various methods based on welding, mechanical joining, and combinations of various joining methods. The research should be focused on joining materials with an emphasis on the evaluation of the properties of the joints (static and dynamic strength properties, corrosion resistance, etc.) or the prediction of the properties of the joints using the means of numerical simulations. The latest information on trends in the applications of joining systems for joining new materials with different physical and chemical properties will be expected.

Dr. Lubos Kascak
Prof. Dr. Emil Spišák
Dr. Jacek Mucha
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. Applied Sciences 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 2400 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
  • mechanical joining
  • combination of joining methods
  • hybrid joining
  • FEM analysis

Published Papers (5 papers)

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Research

17 pages, 11583 KiB  
Article
The Influence of Low-Pressure Plasma Treatments on the Lap Shear Strength of Laser-Joined AISI 304 Hybrids with Polypropylene and Polyamide 6.6
by Wolfgang Tillmann, Lukas Wojarski, Christian Hopmann, Patricia Fatherazi and Christian Timmer
Appl. Sci. 2023, 13(24), 13275; https://doi.org/10.3390/app132413275 - 15 Dec 2023
Viewed by 609
Abstract
This paper investigates if the polar groups induced by a plasma treatment can increase the lap shear strength of laser-joined metal and plastic hybrids. Optimal laser joining parameters for cold-rolled AISI304–polyamide 6.6 and sandblasted AISI304–polypropylene hybrids were developed at 2.85 MPa and 4.22 [...] Read more.
This paper investigates if the polar groups induced by a plasma treatment can increase the lap shear strength of laser-joined metal and plastic hybrids. Optimal laser joining parameters for cold-rolled AISI304–polyamide 6.6 and sandblasted AISI304–polypropylene hybrids were developed at 2.85 MPa and 4.22 MPa, respectively. The surface free energy was doubled for all used plasma gases to a value of ca. 80 mN m−1 at 180 s. The plasma-treated samples were joined and tested. The arithmetic means of the plasma-treated hybrids’ lap shear strength with polyamide 6.6 varied slightly, but all measured values were within the range of the untreated samples. Residue on the sheared metal samples indicated covalent bonds between AISI304 and polyamide 6.6. The lap shear strengths of the plasma-treated polypropylene hybrids were significantly reduced between −30.8% and −53.3%, depending on the used plasma gas. This was attributed to the over-aging and development of low-molecular-weight oxidized materials, which led to a weak boundary layer. No residue of polypropylene was found on treated or untreated lap shear samples. No correlation between the surface free energy and lap shear strength could be found. Full article
(This article belongs to the Special Issue Recent Advances in Materials Welding and Joining Technologies)
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13 pages, 1943 KiB  
Article
Failure Analysis of Resistance Spot-Welded Structure Using XFEM: Lifetime Assessment
by Murat Demiral and Ertugrul Tolga Duran
Appl. Sci. 2023, 13(19), 10923; https://doi.org/10.3390/app131910923 - 02 Oct 2023
Cited by 1 | Viewed by 1028
Abstract
Due to their effective and affordable joining capabilities, resistance spot-welded (RSW) structures are widely used in many industries, including the automotive, aerospace, and manufacturing sectors. Because spot-welded structures are frequently subjected to cyclic stress conditions while in service, fatigue failure is a serious [...] Read more.
Due to their effective and affordable joining capabilities, resistance spot-welded (RSW) structures are widely used in many industries, including the automotive, aerospace, and manufacturing sectors. Because spot-welded structures are frequently subjected to cyclic stress conditions while in service, fatigue failure is a serious concern. It is essential to comprehend and predict their fatigue behavior in order to guarantee the dependability and durability of the relevant engineering products. The analysis of fatigue failure in spot-welded structures is the main topic of this paper, along with the prediction of fatigue life (Nf) and identification of failure mechanisms. Also, the effects of parameters such as the amount of cyclic load applied, the load ratio, and size of the spot-welding on the Nf were investigated. To achieve this, the fatigue performance of spot-welded joints was simulated using the extended finite element method (XFEM). The XFEM method is particularly suited for capturing intricate crack patterns in spot-welded structures because it allows for the modeling of crack propagation without the need for remeshing. It was observed that when the cycling load was decreased by 20%, Nf increased by around 250%. On the other hand, the fatigue life of the structure, and, hence, the crack propagation rate, was significantly affected by the load ratio and diameter of the spot-welding. This paper presents the details of the novel approach to studying spot-weld fatigue characterization using XFEMs to simulate crack propagation. Full article
(This article belongs to the Special Issue Recent Advances in Materials Welding and Joining Technologies)
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19 pages, 5453 KiB  
Article
Precision and Dimensional Stability of Bonded Joints of Carbon-Fibre-Reinforced Polymers Parts
by Radim Kupčák, Jan Zouhar, Jindřich Viliš, Lukáš Gregor and Denisa Hrušecká
Appl. Sci. 2023, 13(18), 10413; https://doi.org/10.3390/app131810413 - 18 Sep 2023
Viewed by 700
Abstract
This article aims to investigate the accuracy and dimensional stability of bonded metal and CFRP (Carbon Fibre Reinforced Plastic) adherends. The motivation behind this study was to assess the suitability of CFRP for optical devices through the evaluation of precision bonding technology. A [...] Read more.
This article aims to investigate the accuracy and dimensional stability of bonded metal and CFRP (Carbon Fibre Reinforced Plastic) adherends. The motivation behind this study was to assess the suitability of CFRP for optical devices through the evaluation of precision bonding technology. A binocular was selected as a reference optical device. A technological sample was designed, with required total runout of key dimensions 0.05 mm. The sample underwent testing according to ISO 9022-1. The total runout was evaluated after production and environmental tests. Eight out of 15 samples were turned after gluing due to insufficient accuracy. None of the turned samples exceeded the total runout deviation of 0.01 mm, and the average value of the maximal deviation was 0.0041 mm. The noncalibrated samples performed significantly worse with the average value of the maximal deviation of 0.0164 mm. The measurements during the climatic tests showed that the largest deviation (on average 77.6% of the maximum achieved deviation) occurs at the first temperature loading. Subsequent temperature cycles caused lower deviations. The results highlight the significance of addressing deformations resulting from adhesive volume shrinkage-induced stress as a crucial factor in precision bonding technology. Full article
(This article belongs to the Special Issue Recent Advances in Materials Welding and Joining Technologies)
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25 pages, 39721 KiB  
Article
Clinching of High-Strength Steel Sheets with Local Preheating
by Miroslav Džupon, Ľuboš Kaščák, Denis Cmorej, Lucia Čiripová, Jacek Mucha and Emil Spišák
Appl. Sci. 2023, 13(13), 7790; https://doi.org/10.3390/app13137790 - 01 Jul 2023
Cited by 4 | Viewed by 1294
Abstract
Clinching is a manufacturing method of mechanically joining two or more materials without the use of heat or additional components. This process relies on high plastic deformation to create a secure bond. Clinching technology is widely used for joining materials of various grades [...] Read more.
Clinching is a manufacturing method of mechanically joining two or more materials without the use of heat or additional components. This process relies on high plastic deformation to create a secure bond. Clinching technology is widely used for joining materials of various grades and thicknesses. Especially in the automotive industry, clinching is an alternative to resistance spot welding. However, the load-bearing capacity of clinched joints is comparatively lower when compared to resistance spot-welded joints. This research aimed to increase the load-carrying capacity of clinched joints. To enhance the load-bearing capacity of the clinched joints, localized modification of the microstructure was carried out, primarily focusing on the neck area of the joint. The alteration of the microstructure within the clinched joint was accomplished through the application of localized heating using the resistance spot welding method. The microstructure distribution in the clinched joint region was analyzed using light and scanning electron microscopy, as well as microhardness measurements. Two material grades, micro-alloyed steel HX420LAD+Z and dual-phase ferritic–martensitic steel HCT600X+Z, were tested. Each grade underwent five groups of ten samples, which were subjected to identical experimental conditions of local heating by resistance spot welding (RSW) and clinching. The utilization of RSW on the clinched joint region resulted in an average enhancement of 17% in the load-carrying capacity for material HCT600X+Z, and an average increase of 25% for material HX420LAD+Z. Full article
(This article belongs to the Special Issue Recent Advances in Materials Welding and Joining Technologies)
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23 pages, 7064 KiB  
Article
Investigating the Welding Parameters in Friction Stir Welding of Yellow Brass 405-20
by Syed Farhan Raza, Muhammad Amjad, Muhammad Salman Habib, Naveed Ahmed and Fahid Riaz
Appl. Sci. 2023, 13(4), 2433; https://doi.org/10.3390/app13042433 - 14 Feb 2023
Cited by 1 | Viewed by 1393
Abstract
This research presents the numerical and empirical efforts to investigate the effect of friction stir welding (FSW) parameters on the weld temperature, weld strength, and weld hardness for novel brass known as yellow brass 405-20. The numerical approaches used to measure the weld [...] Read more.
This research presents the numerical and empirical efforts to investigate the effect of friction stir welding (FSW) parameters on the weld temperature, weld strength, and weld hardness for novel brass known as yellow brass 405-20. The numerical approaches used to measure the weld temperature and weld strength were studied for the first time for yellow brass 405-20 and their validations via empirical studies. Two numerical models were simulated including transient thermal analysis and static structural analysis. Thermal distribution leading to maximum weld temperature during FSW of yellow brass was investigated via both simulations and experiments. Moreover, the ultimate tensile strength, namely the weld strength, was measured numerically and validated from its empirical counterpart. Finally, weld hardness was measured empirically to explore the joint health. A maximum temperature of 598 °C was recorded, which was much below the melting point of brass. Joint strength of 228 MPa was observed, which is 83% of the base brass strength. Microscopic examination of the weldment revealed the underlying mechanisms of less weld strength as compared to the parent brass material strength. Full article
(This article belongs to the Special Issue Recent Advances in Materials Welding and Joining Technologies)
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