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Applied Sciences
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New Insights in Material Forming
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New Insights in Material Forming

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

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 2121

Special Issue Editor

Dr. Fei Feng

E-Mail Website
Guest Editor
College of Engineering, China Agricultural University, Beijing 100083, China
Interests: new plastic forming technology; electromagnetic forming technology; automotive lightweight technology; finite element analysis, optimization and control of material forming

Special Issue Information

Dear Colleagues,

The formation of materials is an important aspect of the manufacturing industry, and the procedures involved are becoming increasingly vital to the development of advanced manufacturing technology. Casting, forging, welding and other materials processing techniques have been relied upon as the primary technologies for the sustainable development of the national economy. In recent years, plastic forming has developed from the traditional forging forming processes to the new stages of precision forming integration, multi-energy field plastic forming and microforming, each of which has developed research hotspots and frontier directions. The various plastic forming methods include: sheet forming; deep drawing; spinning; flow turning; stretch forming; fluid and hydro-forming; cutting; forging; rolling; tube forming; extrusion; wire and tube drawing; high-energy and explosive forming; powder forming; mushy state forming; hot, warm and cold processes; super-plastic forming; micro- and nano- forming; multi-material forming; incremental forming.

This Special Issue will be discuss recent developments, innovations and advances in metal forming processes.

Dr. Fei Feng
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. 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

  • casting
  • forging
  • welding
  • sheet forming
  • multi-material forming

Published Papers (2 papers)

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Research

12 pages, 4323 KiB  
Article
Simulation and Experiment Study on Cone End Billet Method in Upsetting Billet with a Large Height-to-Diameter Ratio
by Junkai Fan, Zhenpeng Liu, Wei Liu and Chengpeng Wang
Appl. Sci. 2023, 13(17), 9523; https://doi.org/10.3390/app13179523 - 23 Aug 2023
Viewed by 658
Abstract
A novel upsetting method, called Cone End Billet Upsetting (CEBU), is proposed in this paper to control bulging during the upsetting of large height-to-diameter ratio (LHDR) billets. This new upsetting method is mainly characterized by prefabricating a conical shape at the billet end, [...] Read more.
A novel upsetting method, called Cone End Billet Upsetting (CEBU), is proposed in this paper to control bulging during the upsetting of large height-to-diameter ratio (LHDR) billets. This new upsetting method is mainly characterized by prefabricating a conical shape at the billet end, which aims to reduce the friction effect between the billet end and the anvil. In order to validate CEBU, the metal flow characteristics during upsetting of LHDR billets with traditional upsetting (TU) and CEBU were analyzed and compared by the finite element method. Experiments were also carried out to examine the deformation characteristics and microstructure of pure copper samples. The results show that, compared with TU, CEBU has a great advantage in restraining bulging and enhancing the compaction effect of upsetting. Meanwhile, bulging can be eliminated in CEBU with a 50% reduction ratio. In addition, aided by the cone end, the metal flow is no longer sensitive to the friction effect at the billet end. From the point of view of restraining bulging, a small taper angle is necessary prior to use. Furthermore, to avoid instability deformation, the height-to-diameter ratio of the billet should be below 3.0. CEBU is effective in suppressing the generation of bulging, but it also increases the pre-forming process for the end of the billet. The study on CEBU in this article is under laboratory conditions, and exploring the industrial application of CEBU will be the focus of our future research. Full article
(This article belongs to the Special Issue New Insights in Material Forming)
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14 pages, 2919 KiB  
Article
Characterization of the Superplastic Magnesium Alloy AZ31 through Free-Forming Tests and Inverse Analysis
by Gillo Giuliano and Wilma Polini
Appl. Sci. 2023, 13(4), 2730; https://doi.org/10.3390/app13042730 - 20 Feb 2023
Cited by 1 | Viewed by 1155
Abstract
This work proposes a simple procedure to characterize 1.0 mm thick sheets of superplastic magnesium alloy AZ31. The simplest mathematical function that models the behavior of a superplastic material is a power law between stress and strain rate with two parameters connected to [...] Read more.
This work proposes a simple procedure to characterize 1.0 mm thick sheets of superplastic magnesium alloy AZ31. The simplest mathematical function that models the behavior of a superplastic material is a power law between stress and strain rate with two parameters connected to the material: K and m. First, the parameter m (variable with the strain) was defined directly by carrying out free-forming experimental tests at constant pressure and using a simple expression taken from the analytical modeling of the free-forming process. In the second step, an inverse analysis was carried out through a finite element model (FEM) and based on a numerical–experimental comparison between the results of the dimensionless height–time (H–t) curve, which made it possible to identify the variation of the parameter K in the same strain range. Once the m and K parameters were evaluated, it was possible to simulate the free-forming tests at constant pressure in the pressure range used to characterize the material. The proposed procedure to estimate m and K parameters made it possible to best match the numerical with the experimental results in terms of the dimensionless height–time curve. The difference between the forming time estimated by FEM and that measured experimentally along the H–t curve was found to be less than 9%. Full article
(This article belongs to the Special Issue New Insights in Material Forming)
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