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Metals
Special Issues
Forming and Mechanical Properties of Metals
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Forming and Mechanical Properties of Metals

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 4185

Special Issue Editor

Prof. Dr. Jonghun Yoon

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Hanyang University, Seoul 15588, Korea
Interests: plasticity; metal forming; computational finite element analysis; hybrid analysis; texture analysis; additive manufacturing (3D printing); nuclear fuel rod

Special Issue Information

Dear Colleagues,

Recently, many different types of forming processes with ferrous/nonferrous metals and other materials have been proposed. The various and sophisticated forming processes do not only improve the efficiency of manufacturing process but also enhance the mechanical properties of manufactured products tremendously. It is substantially complicated to optimize manufacturing processes, since any such optimization depends on the status of the initial material and its mechanical or chemical properties. For instance, in the case of metal 3D printing, the quality of the printed product tends to be influenced by the characteristics of the metal powder with integrated process parameters such as beam source and power, etc. Under these circumstances, it is necessary to introduce concepts related to the many types of manufacturing processes, including forming and joining, and so on, and combine them with our understanding of the material properties. The purpose of this Special Issue is to present the latest plastic forming research related to the material properties of input materials through various experimental or analytical approaches. Furthermore, studies related to new materials or forming processes with superior performance over conventional ones are also be welcomed.

Prof. Dr. Jonghun Yoon
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

  • Forming Process
  • 3D Printing
  • Material Properties
  • Heat Treatment
  • Metallurgical Process
  • Lightweight Materials
  • Advanced-High-Strength Steel
  • Optimum Forming Process
  • Formability

Published Papers (2 papers)

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Research

16 pages, 69453 KiB  
Article
Investigation of the Correlation between Initial Microstructure and Critical Current Density of Nb-46.5 wt%Ti Superconducting Material
by In Yong Moon, Se-Jong Kim, Ho Won Lee, Jaimyun Jung, Young-Seok Oh and Seong-Hoon Kang
Metals 2021, 11(5), 777; https://doi.org/10.3390/met11050777 - 10 May 2021
Cited by 3 | Viewed by 1929
Abstract
We have investigated the effect of initial microstructures on the change in critical current density (Jc) of Nb-46.5 wt%Ti (NbTi) superconducting material. It is well known that α-Ti phases distributed in NbTi material act as a flux pinning center, resulting in an improvement [...] Read more.
We have investigated the effect of initial microstructures on the change in critical current density (Jc) of Nb-46.5 wt%Ti (NbTi) superconducting material. It is well known that α-Ti phases distributed in NbTi material act as a flux pinning center, resulting in an improvement in critical current density. Therefore, it is crucial to obtain the grain-refined microstructure, which is strongly related with precipitation of uniformly distributed fine α-Ti phases and higher volume faction of α-Ti phases, as α-Ti phases are precipitated at the grain boundaries and triple points during heat treatments. Therefore, in order to characterize the effect of initial microstructure of NbTi on critical current density, different initial microstructures were obtained by applying equal channel angular pressing (ECAP) and hot rolling with different strains. It was revealed experimentally that hot rolling with a higher strain is efficient for obtaining the initial microstructure, which has equiaxed fine grains of β-NbTi with the aid of dynamic recrystallization, and which is helpful for precipitating fine α-Ti phases during intermediate heat treatment. Furthermore, it was confirmed that critical current density can be enhanced by obtaining a smaller α-Ti phase, a higher aspect ratio of α-Ti phase, a higher volume fraction of α-Ti phase and a ribbon-like folded α-Ti phase. Full article
(This article belongs to the Special Issue Forming and Mechanical Properties of Metals)
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13 pages, 47541 KiB  
Article
Effects of Excessive Zr Content and Ultrasonic Treatment on Microstructure and Mechanical Properties of Al-Zn-Mg-Cu Alloy
by Cheng Li, Shusen Wu, Shulin Lü, Jianyu Li, Longfei Liu and Lanqing Xia
Metals 2021, 11(4), 632; https://doi.org/10.3390/met11040632 - 13 Apr 2021
Cited by 6 | Viewed by 1820
Abstract
The Zr element is one of the important grain refiners for 7xxx series Al-Zn-Mg-Cu alloys, but the effect of Zr content more than 0.15 wt.% needs to be deeply investigated under the action of ultrasonic vibration. In this study, the effects of Zr [...] Read more.
The Zr element is one of the important grain refiners for 7xxx series Al-Zn-Mg-Cu alloys, but the effect of Zr content more than 0.15 wt.% needs to be deeply investigated under the action of ultrasonic vibration. In this study, the effects of Zr contents (0.1 to 0.25 wt.%) on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy were studied. The results showed that Zr element could refine grains, but when the Zr content was greater than 0.15 wt.%, the grain size was not uniform, the number of second phase particles increased, and the segregation of components became more serious. It was found that after ultrasonic treatment, the grain-size inhomogeneity was greatly improved, and the Zr content could be added up to 0.2 wt.%. When the Zr content is equal or lower than 0.2 wt.%, ultrasonic treatment can effectively improve the mechanical properties of materials by refining grains and weakening segregation. However, when the Zr content is up to 0.25 wt.%, the effect is getting worse. Full article
(This article belongs to the Special Issue Forming and Mechanical Properties of Metals)
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