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Metals
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Development of Metallic Materials through Hot or Cold Processes and...
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Development of Metallic Materials through Hot or Cold Processes and Characterization of the Metallic Alloys

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 9320

Special Issue Editor

Prof. Dr. Ildiko Peter

E-Mail Website
Guest Editor
Department of Industrial Engineering and Management, Faculty of Engineering and Information Technology, “George Emil Palade” University of Medicine, Pharmacy, Science and Technology of Târgu Mureș, Targu Mures, Romania
Interests: development and characterization of metallic alloys for different applications; coatings on metallic substrates; synthesis and characterization of materials for advanced electromagnetic applications; study of piezoelectric ceramics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Appropriate materials and a precise manufacturing process make it possible to obtain a long lifetime for any product, with important economic and environmental consequences. Fe-based and/or light alloys, including alloys of Al, Ti, Mg, Cu, etc., are frequently used for many applications.

On the one hand, in today’s industrialized society, metals and their alloys are very important materials, which play a key role in various engineering applications. They have many uses, due in particular to their excellent mechanical behavior (high strength and hardness) good electrical conductivity, and good corrosion resistance, among many other properties.

On the other hand, manufacturing technologies are equally important in order to produce high-quality metals and/or their alloys. The development of new industrial processes to produce metallic alloys with enhanced properties represents a valid way to enhance the lifespan and reliability of engineering components.

Control over the shape and distribution of the grains that make up any metallic structure is of primary importance—this is what ultimately governs the properties of the metallic alloy produced. Frequently, improved mechanical strength is required, especially in applications where structural properties are essential. Thermal treatments and/or reductions in the grain size of the constituents are commonly used methods to improve some properties of the alloys and increase their efficiency.

The present Special Issue will address the latest research on the potentialities of metals and their alloys, as well as advances in traditional and alternative manufacturing methods and cold and/hot processes, in order to efficiently develop metallic materials important for our everyday life. Research papers aiming at the development of enhanced, high-quality metallic materials, obtained with eco-friendly and low-cost manufacturing processes, are also encouraged.

Prof. Dr. Ildiko Peter
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

  • steels
  • light metals
  • hot and cold processes
  • characterization
  • morphology
  • mechanical properties
  • thermal treatments

Published Papers (4 papers)

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Research

15 pages, 5116 KiB  
Article
Characterization of AlSi10Mg-CP-Ti Metal/Metal Composite Materials Produced by Electro-Sinter-Forging
by Federico Simone Gobber, Elisa Fracchia, Alessandro Fais, Ildiko Peter and Marco Actis Grande
Metals 2021, 11(10), 1645; https://doi.org/10.3390/met11101645 - 17 Oct 2021
Cited by 4 | Viewed by 1442
Abstract
Metal–metal composites represent a particular class of materials showing innovative mechanical and electrical properties. Conventionally, such materials are produced by severely plastically deforming two ductile phases via rolling or extruding, swaging, and wire drawing. This study presents the feasibility of producing metal–metal composites [...] Read more.
Metal–metal composites represent a particular class of materials showing innovative mechanical and electrical properties. Conventionally, such materials are produced by severely plastically deforming two ductile phases via rolling or extruding, swaging, and wire drawing. This study presents the feasibility of producing metal–metal composites via a capacitive discharge-assisted sintering process named electro-sinter-forging. Two different metal–metal composites with CP-Ti/AlSi10Mg ratios (20/80 and 80/20 vol.%) are evaluated, and the effects of the starting compositions on the microstructural and compositional properties of the materials are presented. Bi-phasic metal–metal composites constituted by isolated α-Ti and AlSi10Mg domains with a microhardness of 113 ± 13 HV0.025 for the Ti20-AlSi and 244 ± 35 HV0.025 for the Ti80-AlSi are produced. The effect of the applied current is crucial to obtain high theoretical density, but too high currents may result in Ti dissolution in the Ti80-AlSi composite. Massive phase transformations due to the formation of AlTiSi-based intermetallic compounds are observed through thermal analysis and confirmed by morphological and compositional observation. Finally, a possible explanation for the mechanisms regulating densification is proposed accounting for current and pressure synergistic effects. Full article
(This article belongs to the Special Issue Development of Metallic Materials through Hot or Cold Processes and Characterization of the Metallic Alloys)
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14 pages, 5345 KiB  
Article
Investigations into Ti-Based Metallic Alloys for Biomedical Purposes
by Ildiko Peter
Metals 2021, 11(10), 1626; https://doi.org/10.3390/met11101626 - 13 Oct 2021
Cited by 7 | Viewed by 1492
Abstract
In the present research paper, two systems based on Ti-Nb-Zr-Ta and Ti-Nb-Zr–Fe, containing non-toxic elements, are considered and investigated. The first aim of the paper is to enlarge up-to-date developed β-type Ti alloys, analyzing three different compositions, Ti-10Nb-10Zr-5Ta, Ti-20Nb-20Zr-4Ta and Ti-29.3Nb-13.6Zr-1.9Fe, in order [...] Read more.
In the present research paper, two systems based on Ti-Nb-Zr-Ta and Ti-Nb-Zr–Fe, containing non-toxic elements, are considered and investigated. The first aim of the paper is to enlarge up-to-date developed β-type Ti alloys, analyzing three different compositions, Ti-10Nb-10Zr-5Ta, Ti-20Nb-20Zr-4Ta and Ti-29.3Nb-13.6Zr-1.9Fe, in order to assess their further employment in biomedical applications. To achieve this, structural, microstructural, compositional and mechanical investigations were performed as part of this study. Based on the results obtained, the alloy with the highest Nb content seems to be the most appropriate candidate for advanced biomedical applications and, in particular, for bone substitution. Full article
(This article belongs to the Special Issue Development of Metallic Materials through Hot or Cold Processes and Characterization of the Metallic Alloys)
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13 pages, 5889 KiB  
Article
Drawing-Induced Evolution of Inclusions in Cold-Drawn Pearlitic Steel
by Jesús Toribio, Francisco-Javier Ayaso and Rocío Rodríguez
Metals 2021, 11(8), 1272; https://doi.org/10.3390/met11081272 - 12 Aug 2021
Cited by 2 | Viewed by 1624
Abstract
This article focuses on the analysis of the evolution of inclusions present in eutectoid pearlitic steel subjected to a real cold drawing process. To this end, wires belonging to different stages of the manufacture chain were studied, starting from an initial hot rolled [...] Read more.
This article focuses on the analysis of the evolution of inclusions present in eutectoid pearlitic steel subjected to a real cold drawing process. To this end, wires belonging to different stages of the manufacture chain were studied, starting from an initial hot rolled bar (not cold drawn at all). In addition to the information obtained through visual inspection, a quantitative analysis of the microdefects generated by these inclusions was carried out. The analysis was performed using materialographic techniques, scanning electron microscopy (SEM) and the image analysis program (AnaliSYS 3.1®). Full article
(This article belongs to the Special Issue Development of Metallic Materials through Hot or Cold Processes and Characterization of the Metallic Alloys)
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19 pages, 8762 KiB  
Article
Effect of Alloying Elements on the Sr Modification of Al-Si Cast Alloys
by Elisa Fracchia, Federico Simone Gobber and Mario Rosso
Metals 2021, 11(2), 342; https://doi.org/10.3390/met11020342 - 19 Feb 2021
Cited by 20 | Viewed by 3398
Abstract
Strontium-based modifier alloys are commonly adopted to modify the eutectic silicon in aluminum-silicon casting alloys by changing the silicon shape from an acicular to a spherical form. Usually, the modifier alloy necessary to properly change the silicon shape depends on the silicon content, [...] Read more.
Strontium-based modifier alloys are commonly adopted to modify the eutectic silicon in aluminum-silicon casting alloys by changing the silicon shape from an acicular to a spherical form. Usually, the modifier alloy necessary to properly change the silicon shape depends on the silicon content, but the alloying elements’ content may have an influence. The AlSr10 master alloy’s modifying effect was studied on four Al-Si alloys through the characterization of microstructural and mechanical properties (micro-hardness and impact tests). The experimental results obtained on gravity cast samples highlighted the interdependence in the modification of silicon between the Si content and the alloying elements. After modification, a higher microstructural homogeneity characterized by a reduction of up to 22.8% in the size of intermetallics was observed, with a generalized reduction in secondary dendritic arm spacing. The presence of iron-based polygonal-shaped intermetallics negatively affects Sr modification; coarser silicon particles tend to grow close to α-Fe. The presence of casting defects such as bifilm reduces Sr modification’s beneficial effects, and little increase in absorbed impact energy is observed in this work. Full article
(This article belongs to the Special Issue Development of Metallic Materials through Hot or Cold Processes and Characterization of the Metallic Alloys)
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