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Sheet/Bulk Metal Forming and Hybrid Components
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Sheet/Bulk Metal Forming and Hybrid Components

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 June 2022) | Viewed by 7908

Special Issue Editors

Prof. Dr. Bernd-Arno Behrens

E-Mail Website
Guest Editor
Institute of Forming Technology and Machines, Leibniz Universität Hannover, 30823 Garbsen, Germany
Interests: sheet metal forming; bulk metal forming; forming machines; material characterization and simulation; tailored forming
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Sergei Alexandrov

E-Mail Website
Guest Editor
Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, 101-1 Prospekt Vernadskogo, Moscow 119526, Russia
Interests: plasticity; fracture mechanics; structural design
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The forming production of sheet metal and bulk components is a highly specialized and automated process today. Science and industry work closely together to constantly establish new processes to be more productive and economic.

The change in forming technology due to the new challenges of globalization, sustainability, and the change in mobility can be addressed in this Special Issue. The worldwide challenges for production and forming technology in particular, due to the reasons mentioned above, are constantly driving researchers and industry to improve existing processes.

State-of-the-art approaches for modern forming technology as well as new solution in the forming technology are of interest to this Special Issue.

Topics from sheet and bulk metal forming to material characterization and numerical investigations for forming processes can be addressed in this Special Issue.

Prof. Dr. Bernd-Arno Behrens
Prof. Dr. Sergei Alexandrov
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. 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

  • sheet metal forming
  • bulk metal forming
  • design and tailored forming
  • welding and joining
  • hybrid metal components
  • mechanical behaviors
  • microstructure and modeling

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Published Papers (4 papers)

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Research

17 pages, 2436 KiB  
Article
A New Semi-Analytical Solution for an Arbitrary Hardening Law and Its Application to Tube Hydroforming
by Stanislav Strashnov, Sergei Alexandrov and Lihui Lang
Materials 2022, 15(17), 5888; https://doi.org/10.3390/ma15175888 - 26 Aug 2022
Cited by 2 | Viewed by 1329
Abstract
The present study consists of two parts. The first part supplies an exact semi-analytical solution for a general model of rigid plastic strain hardening material at large strains. The second part applies this solution to tube hydroforming design. The solution provides stress and [...] Read more.
The present study consists of two parts. The first part supplies an exact semi-analytical solution for a general model of rigid plastic strain hardening material at large strains. The second part applies this solution to tube hydroforming design. The solution provides stress and velocity fields in a hollow cylinder subject to simultaneous expansion and elongation/contraction. No restriction is imposed on the hardening law. A numerical method is only required to evaluate ordinary integrals. The solution is facilitated using Lagrangian coordinates. The second part of the paper is regarded as an alternative to the finite element design of tube hydroforming processes, restricted to rather simple final shapes. An advantage of this approach is that the hardening law is not required for calculating many process parameters. Therefore, the corresponding design is universally valid for all strain hardening materials if these parameters are of concern. In particular, the prediction of fracture initiation at the outer surface is independent of the hardening law for widely used ductile fracture criteria. The inner pressure is the only essential process parameter whose value is controlled by the hardening law. Full article
(This article belongs to the Special Issue Sheet/Bulk Metal Forming and Hybrid Components)
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18 pages, 8246 KiB  
Article
Integration of Hot Tube Gas Forming and Die Quenching of Ultra-High Strength Steel Hollow Parts Using Low Pressure Sealed-Air
by Ali Talebi-Anaraki, Tomoyoshi Maeno, Yuta Matsubara, Ryohei Ikeda and Ken-ichiro Mori
Materials 2022, 15(4), 1322; https://doi.org/10.3390/ma15041322 - 10 Feb 2022
Cited by 5 | Viewed by 2473
Abstract
A low pressure sealed-air hot tube gas forming process of ultra-high strength steel tubes was developed not only to change the cross-section of the hollow products by bulging but also to increase the strength of components. Gas-formed components are typically formed by a [...] Read more.
A low pressure sealed-air hot tube gas forming process of ultra-high strength steel tubes was developed not only to change the cross-section of the hollow products by bulging but also to increase the strength of components. Gas-formed components are typically formed by a controlled-gas pressure with extremely high internal pressure, which leads to affected production costs and safety. Moreover, compressing the gas with high pressure requires high energy during its preparation. Therefore, to simplify the internal pressure controlling system and improve the safety factor in gas forming processes, the sealed-air tubes are formed with a quite low initial pressure. The pressure of the sealed air increased with increasing temperature of the air inside the resistance-heated tube, and the bulging deformation was controlled only by axial feeding. The effects of the initial pressure and heating temperature on the bulging deformation and quenchability of the tubes, and the effect of the starting time of axial feeding on the bulging behavior were examined. Consequently, ultra-high strength steel bulged parts were produced even in low initial internal pressure and with the rapid heating of the tubes. Full article
(This article belongs to the Special Issue Sheet/Bulk Metal Forming and Hybrid Components)
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Graphical abstract

22 pages, 14201 KiB  
Article
Effect of Strain Rate Sensitivity on Fracture of Laminated Rings under Dynamic Compressive Loading
by Amir Partovi, Mohammad Mehdi Shahzamanian and Peidong Wu
Materials 2022, 15(2), 472; https://doi.org/10.3390/ma15020472 - 8 Jan 2022
Cited by 3 | Viewed by 1543
Abstract
The effects of cladding layers of rate-sensitive materials on the ductility and fracture strain of compressed rings are numerically investigated by using the finite element method (FEM) and employing the Johnson–Cook (J–C) model. The results show that ductility is governed by the behavior [...] Read more.
The effects of cladding layers of rate-sensitive materials on the ductility and fracture strain of compressed rings are numerically investigated by using the finite element method (FEM) and employing the Johnson–Cook (J–C) model. The results show that ductility is governed by the behavior of the material that is located at the ring outer wall regardless of the volume fraction of the core and clad materials. However, as the number of layers increases, this influence becomes less noticeable. Moreover, as barreling increases at the outer wall and decreases at the inner wall, fracture strain increases. Furthermore, the effects of ring shape factor and bonding type of clad and core materials are numerically evaluated. The numerical results show that less force per unit volume is required to fracture narrower rings and that using a noise diffusion pattern at the interface of the materials is more suitable to simulate crack propagation in the compressed rings and functionally graded materials (FGMs). Additionally, delamination has a direct relation to layer thickness and can occur even in the presence of perfect bonding conditions owing to differences among the material and fracture parameters of laminated layers. Full article
(This article belongs to the Special Issue Sheet/Bulk Metal Forming and Hybrid Components)
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12 pages, 3373 KiB  
Article
Creep Age Forming of Fiber Metal Laminates: Effects of Process Time and Temperature and Stacking Sequence of Core Material
by Mehdi Safari, Ricardo Alves de Sousa, Fábio Fernandes, Mazaher Salamat-Talab and Arash Abdollahzadeh
Materials 2021, 14(24), 7881; https://doi.org/10.3390/ma14247881 - 20 Dec 2021
Cited by 4 | Viewed by 1627
Abstract
Fiber metal laminates (FMLs) are a type of hybrid materials interlacing composites and metals. In the present work, FMLs with aluminum alloy 6061 as the skin and E-glass fiber-reinforced polypropylene (PP) as the core material are fabricated and formed by the creep age [...] Read more.
Fiber metal laminates (FMLs) are a type of hybrid materials interlacing composites and metals. In the present work, FMLs with aluminum alloy 6061 as the skin and E-glass fiber-reinforced polypropylene (PP) as the core material are fabricated and formed by the creep age forming (CAF) process. The effects of time and temperature as the process parameters and thickness and stacking sequences of composites layers as the FML parameters are evaluated on the springback of glass-reinforced aluminum laminates (GLARE) FMLs. After the CAF process, the springback of creep age-formed FMLs is calculated. The results show that the FMLs can be successfully formed with the CAF process by considering appropriate time and temperature. In addition, the stacking sequence of composite layers can affect the springback behavior of FMLs significantly. Full article
(This article belongs to the Special Issue Sheet/Bulk Metal Forming and Hybrid Components)
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