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Metals
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Advanced Welding and Joining Processes for Automotive Applications
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Advanced Welding and Joining Processes for Automotive Applications

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

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 4542

Special Issue Editor

Dr. Taeseon Lee

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
Interests: novel manufacturing processes; impact welding; solid-state welding; resistance spot welding; welding metallurgy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the increasing demands for lightweighting, the use of light metals and composites for automotive manufacturing is continuously required. Many car manufacturers especially strive to find effective ways to join dissimilar material combinations and coated materials without adding significant cost or weight to the structure.

This Special Issue is devoted to addressing the recent efforts to develop novel welding and joining processes that can potentially reduce weight, cost, and time while increasing the strength, reliability, and weldability of metallic or non-metallic structures. The research articles are expected to either introduce novel joining processes or contribute to the understanding of the welding metallurgy of advanced materials using microscopy or numerical simulations.

Original research articles and reviews are welcome. I look forward to receiving your contributions.

Dr. Taeseon Lee
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

  • light metals
  • welding
  • joining
  • automotive
  • metals processing

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Published Papers (3 papers)

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Research

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12 pages, 4305 KiB  
Article
Microstructure and Bonding Strength of Low-Temperature Sintered Ag/Nano-Ag Films/Ag Joints
by Lihua Gao, Shuangyang Zou, Changcheng Zheng and Dekui Mu
Metals 2023, 13(11), 1833; https://doi.org/10.3390/met13111833 - 31 Oct 2023
Cited by 1 | Viewed by 1320
Abstract
Nano-Ag paste is one of the most widely used die-attachment materials in modern electronic devices, which are gaining continuously increasing application in transportation industries. The nano-Ag film in a pre-formed dimension and free from the use of chemical dispersing agents has been proposed [...] Read more.
Nano-Ag paste is one of the most widely used die-attachment materials in modern electronic devices, which are gaining continuously increasing application in transportation industries. The nano-Ag film in a pre-formed dimension and free from the use of chemical dispersing agents has been proposed to be a promising alternative to nano-Ag paste for the die-attachment application. Although the bonding mechanisms of Nano-Ag paste have been extensively studied, little is known about the relationship between the microstructure and mechanical properties of low-temperature-sintered Ag/nano-Ag film/Ag joints. In this work, the influences of temperature, pressure, and dwell time at peak temperature on the microstructure and the shear strength of low-temperature-sintered Ag/nano-Ag film/Ag joints were systematically investigated. Mechanical properties tests indicate that both temperature and pressure have pronounced effects on the bonding strength of sintered Ag/nano-Ag film/Ag joints. TEM and hot nanoindentation characterizations further reveal that the sintering temperature plays the most determinant role in the coarsening of nano-Ag film and, hence, the bonding and fracture behaviors of Ag/nano-Ag film/Ag joints sintered at 210–290 °C. The diffusion-induced coarsening of nano-Ag particles can be activated, but remains sluggish at 250 °C, and the mechanical integrity of sintered joints is circumscribed by the interfacial bonding between nano-Ag film and Ag substrate after sintering at 290 °C. Full article
(This article belongs to the Special Issue Advanced Welding and Joining Processes for Automotive Applications)
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13 pages, 12330 KiB  
Article
Effects of Paint Baking Heat Treatments on Mechanical Properties and Microstructure of Resistance Spot-Welded A5022-O and A6014-T4 Alloys
by Hong-geun Park, Seung-chang Han, Chanhoon Park, Younil Jung, Tea-Sung Jun and Taeseon Lee
Metals 2023, 13(10), 1697; https://doi.org/10.3390/met13101697 - 5 Oct 2023
Cited by 3 | Viewed by 1251
Abstract
This study presents information on the behavior of paint baking (PB) after resistance spot welding of the 5- and 6xxx series aluminum alloys. The weld parameters are optimized, and the weld specimens are baked three times for 20 min at 180 °C to [...] Read more.
This study presents information on the behavior of paint baking (PB) after resistance spot welding of the 5- and 6xxx series aluminum alloys. The weld parameters are optimized, and the weld specimens are baked three times for 20 min at 180 °C to simulate the heat treatments required for paint baking. The mechanical properties of the samples were characterized by using the lap shear test, micro/nanoindentation hardness, and fatigue test. As the mechanical properties of the weld are affected by the characteristics of the heat-affected zone and those of the fusion zone, the microstructure of the cross-sections was also analyzed through optical and electron microscopy. The investigation of the 6xxx series welds showed that the post-processing heat treatment decreased both the strength and the toughness of the weld, which resulted from the reduced hardness of the microstructure. Additionally, the lap shear test indicated that the failure mode for the 6xxx series changed from nugget failure to partial nugget failure after the paint baking process. However, the mechanical properties of the 5xxx welds were not affected as much as the 6xxx series during baking heat treatment. The fatigue test for the 6xxx series showed a different tendency from the lap shear test. Its fatigue properties improved due to an increased elastic modulus after the heat treatment. Full article
(This article belongs to the Special Issue Advanced Welding and Joining Processes for Automotive Applications)
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Review

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24 pages, 9325 KiB  
Review
Clinching of Carbon Fiber-Reinforced Composite and Aluminum Alloy
by Daxin Han and Chengliang Hu
Metals 2024, 14(6), 681; https://doi.org/10.3390/met14060681 - 8 Jun 2024
Viewed by 1280
Abstract
The extensive use of carbon fiber-reinforced composites and aluminum alloys represents the highest level of automotive body-in-white lightweighting. The effective and secure joining of these heterogeneous materials remains a prominent and actively researched topic within the scientific community. Among various joining techniques, clinching [...] Read more.
The extensive use of carbon fiber-reinforced composites and aluminum alloys represents the highest level of automotive body-in-white lightweighting. The effective and secure joining of these heterogeneous materials remains a prominent and actively researched topic within the scientific community. Among various joining techniques, clinching has emerged as a particularly cost-effective solution, experiencing significant advancements. However, the application of clinching is severely limited by the properties of the joining materials. In this work, various clinching processes for the joining of composites and aluminum alloys reported in recent research are described in detail according to three broad categories based on the principle of technological improvement. By scrutinizing current clinching technologies, a forward-looking perspective is presented for the future evolution of clinching technology in terms of composite–aluminum joints, encompassing aspects of tool design, process analysis, and the enhancement of joint quality. This work provides an overview of current research on clinching of CFRP and aluminum and serves as a reference for the further development of clinching processes. Full article
(This article belongs to the Special Issue Advanced Welding and Joining Processes for Automotive Applications)
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