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Metals
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Recent Development of Biomedical Alloys
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Recent Development of Biomedical Alloys

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

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 6881

Special Issue Editor

Prof. Dr. Carlos Roberto Grandini

E-Mail Website
Guest Editor
Laboratório de Anelasticidade e Biomateriais, UNESP—Universidade Estadual Paulista, Bauru 17033-360, SP, Brazil
Interests: design and development of novel titanium alloys; surface modification of titanium alloys; biodegradable alloys

Special Issue Information

Dear Colleagues,

Biomedical alloys are designed to take a form that can direct, through interactions with living systems, the course of any therapeutic or diagnostic procedure. Metals are currently used for medical devices, and over 70% of medical implants consist of metals, of which over 90% are orthopedic implants. Despite many metallic medical devices in use today, they are predominantly made up of only a few metals. In this sense, in the last decades, metallic alloys are being used in the biomedical field due to their low elastic modulus, good fatigue strength and formability, and corrosion resistance. However, they are still insufficient for long-term clinical usage as they are bio-inert and cannot bond to living bone directly at the early stage after implantation into a human body. Beta-Ti alloys containing completely biocompatible elements are exceptionally prospective materials for the manufacturing of bioimplants. These biomaterials have the ability to introduce the most important property of biochemical compatibility, which is low elastic modulus. However, most of the research on metal is the surface modification of titanium materials, while magnesium alloys and porous alloys are being studied. In this Special Edition of Metals, we intend to gather the main research results from various areas related to the development, processing, and use of metallic alloys for biomedical applications. Topics of interest comprise the design and processing of biomedical alloys, titanium-based alloys, zirconium-based alloys, biodegradable alloys, porous alloys, mechanical properties of biomedical alloys, corrosion resistance of biomedical alloys, the biocompatibility of biomedical alloys, and characterization techniques.

Prof. Dr. Carlos Roberto Grandini
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

  • Design and Processing of Biomedical Alloys
  • Titanium Alloys
  • Zirconium Alloys
  • Biodegradable Alloys
  • Porous Alloys
  • Mechanical Properties of Biomedical Alloys
  • Corrosion Resistance of Biomedical Alloys
  • Biocompatibility of Biomedical Alloys

Published Papers (2 papers)

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Research

11 pages, 8168 KiB  
Article
Effect of Thermomechanical Treatments on Microstructure, Phase Composition, Vickers Microhardness, and Young’s Modulus of Ti-xNb-5Mo Alloys for Biomedical Applications
by Giovana Collombaro Cardoso, Marília Afonso Rabelo Buzalaf, Diego Rafael Nespeque Correa and Carlos Roberto Grandini
Metals 2022, 12(5), 788; https://doi.org/10.3390/met12050788 - 3 May 2022
Cited by 14 | Viewed by 1805
Abstract
The development of new β-Ti alloys has been extensively studied in the medical field in recent times due to their more suitable mechanical properties, such as a relatively low Young’s modulus. This paper analyzes the influence of heat treatments (homogenization and annealing) and [...] Read more.
The development of new β-Ti alloys has been extensively studied in the medical field in recent times due to their more suitable mechanical properties, such as a relatively low Young’s modulus. This paper analyzes the influence of heat treatments (homogenization and annealing) and hot rolling on the microstructure, phase composition, and some mechanical properties of ternary alloys of the Ti-xNb-5Mo system, with an amount of Nb varying between 0 and 30 wt%. The samples are produced by argon arc melting. After melting, the samples are homogenized at 1000 °C for 24 h and are hot rolled and annealed at 1000 °C for 6 h with slow cooling. Structural and microstructural analyses are made using X-ray diffraction and optical and scanning electron microscopy. Mechanical properties are evaluated by Vickers microhardness and Young’s modulus. The amount of β phase increases after heat treatment and reduces after hot rolling. The microhardness and Young’s modulus of all heat-treated samples decrease when compared with the hot rolled ones. Some samples exhibit atypical Young’s modulus and microhardness values, such as 515 HV for the as-cast Ti-10Nb-5Mo sample, indicating the possible presence of ω phase in the microstructure. The Ti-30Nb-5Mo sample suffers less variation in its phase composition with thermomechanical treatments due to the β-stabilizing effect of the alloying elements. The studied mechanical properties indicate that the annealed Ti-30Nb-5Mo sample has potential for biomedical applications, exhibiting a Young’s modulus value of 69 GPa and a microhardness of 236 HV. Full article
(This article belongs to the Special Issue Recent Development of Biomedical Alloys)
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21 pages, 7881 KiB  
Article
New Ti–35Nb–7Zr–5Ta Alloy Manufacturing by Electron Beam Melting for Medical Application Followed by High Current Pulsed Electron Beam Treatment
by Maria Surmeneva, Irina Grubova, Natalia Glukhova, Dmitriy Khrapov, Andrey Koptyug, Anastasia Volkova, Yurii Ivanov, Cosmin Mihai Cotrut, Alina Vladescu, Anton Teresov, Nikolay Koval, Alexander Tyurin and Roman Surmenev
Metals 2021, 11(7), 1066; https://doi.org/10.3390/met11071066 - 1 Jul 2021
Cited by 20 | Viewed by 4408
Abstract
High-current pulsed electron-beam (PEB) treatment was applied as a surface finishing procedure for Ti–35Nb–7Zr–5Ta (TNZT) alloy produced by electron beam melting (EBM). According to the XRD results the TNZT alloy samples before and after the PEB treatment have shown mainly the single body-centered [...] Read more.
High-current pulsed electron-beam (PEB) treatment was applied as a surface finishing procedure for Ti–35Nb–7Zr–5Ta (TNZT) alloy produced by electron beam melting (EBM). According to the XRD results the TNZT alloy samples before and after the PEB treatment have shown mainly the single body-centered cubic (bcc) β-phase microstructures. The crystallite size, dislocation density, and microstrain remain unchanged after the PEB treatment. The investigation of the texture coefficient at the different grazing angle revealed the evolution of the crystallite orientations at the re-melted zone formed at the top of the bulk samples after the PEB treatment. The top-view SEM micrographs of the TNZT samples treated by PEB exhibited the bcc β-phase grains with an average size of ~85 μm. TEM analysis of as-manufactured TNZT alloy revealed the presence of the equiaxed β-grains with the fine dispersion of nanocrystalline α and NbTi4 phases together with β-Ti twins. Meanwhile, the β phase regions free of α phase precipitation are observed in the microstructure after the PEB irradiation. Nanoindentation tests revealed that the surface mechanical properties of the melted zone were slightly improved. However, the elastic modulus and microhardness in the heat-affected zone and the deeper regions of the sample were not changed after the treatment. Moreover, the TNZT alloy in the bulk region manufactured by EBM displayed no significant change in the corrosion resistance after the PEB treatment. Hence, it can be concluded that the PEB irradiation is a viable approach to improve the surface topography of EBM-manufactured TNZT alloy, while the most important mechanical parameters remain unchanged. Full article
(This article belongs to the Special Issue Recent Development of Biomedical Alloys)
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