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Metals
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Advanced Ti-Based Alloys
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Advanced Ti-Based Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Entropic Alloys and Meta-Metals".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 6212

Special Issue Editor

Prof. Dr. Claudio Aguilar

E-Mail Website
Guest Editor
Departamento de Ingeniería Metalúrgica y Materiales, Universidad Técnica Federico Santa María, Valparaíso C.P. 2390123, Chile
Interests: Ti-based alloys; thermodynamics; powder metallurgy; X-ray diffraction profile analysis

Special Issue Information

Dear Colleagues,

Titanium and Ti-based alloys are widely used in engineering applications such as in the aerospace, biomedical, chemical, and nuclear industries, seeing that they have a high strength-to-weight ratio, excellent corrosion resistance, and negligible biological impact on the human body. In the aerospace field, it is forecasted that the use of Ti-based alloys per plane should increase within the next year due to their high creep and oxidation resistance, good formability, and good strength/density ratio. In the biomedical area, the use of Ti-based alloys will be increasing since they exhibit a slight biological impact on the human body, and human life expectancy is expected to rise rapidly. This Special Issue focuses on the research and development of Ti-based alloys and considers a wide range of topics stemming from the design theory of new alloys to applications.

Prof. Dr. Claudio Aguilar
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

  • Ti-based alloys
  • processing methods
  • microstructure
  • characterization of properties
  • theory
  • modeling and simulating

Published Papers (2 papers)

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Research

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19 pages, 8394 KiB  
Article
Study on the Surface Modification of Nanostructured Ti Alloys and Coarse-Grained Ti Alloys
by Hsuan-Kai Lin, Yi-Hong Cheng, Guan-Yuan Li, Ying-Chi Chen, Piotr Bazarnik, Jessica Muzy, Yi Huang and Terence G. Langdon
Metals 2022, 12(6), 948; https://doi.org/10.3390/met12060948 - 31 May 2022
Cited by 6 | Viewed by 1759
Abstract
Commercial purity titanium (CP-Ti) and a Ti-6Al-4V alloy (Ti64) were processed by high-pressure torsion (HPT) for 10 and 20 turns. The HPT processing produced a nanostructured microstructure and a significant strength enhancement in the CP-Ti and Ti64 samples. After 20 turns, the samples [...] Read more.
Commercial purity titanium (CP-Ti) and a Ti-6Al-4V alloy (Ti64) were processed by high-pressure torsion (HPT) for 10 and 20 turns. The HPT processing produced a nanostructured microstructure and a significant strength enhancement in the CP-Ti and Ti64 samples. After 20 turns, the samples of HPT-processed CP-Ti and Ti64 were subjected to laser surface treatments in an air atmosphere using different scanning speeds and laser powers. The surface roughness of the laser-modified samples increased with increasing laser power and this produced hydrophilicity due to a lower contact angle. After a holding time of 27 days, these samples underwent a hydrophilic-to-hydrophobic transformation as the contact angle increased from 13° to as much as 120° for the CP-Ti sample, and for the Ti64 sample the contact angle increased from 10° to 126°. In addition, the laser surface modification process was carried out with different atmospheres (air, vacuum and O2) on heat-treated but unstrained CP-Ti and Ti64 samples and the contact angle changed due to the surface element content. Thus, as the carbon content increased from 28% to 47% in CP-Ti in a vacuum environment, the surface contact angle increased from 22° to 140°. When a laser surface modification process is conducted under oxygen-less conditions, it is concluded that the contact angle increases rapidly in order to control the hydrophobic properties of Ti and the Ti alloy. Full article
(This article belongs to the Special Issue Advanced Ti-Based Alloys)
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Review

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21 pages, 4112 KiB  
Review
An Overview of Highly Porous Titanium Processed via Metal Injection Molding in Combination with the Space Holder Method
by Francisco Cavilha Neto, Mauricio Vitor Giaretton, Guilherme Oliveira Neves, Claudio Aguilar, Marcelo Tramontin Souza, Cristiano Binder and Aloísio Nelmo Klein
Metals 2022, 12(5), 783; https://doi.org/10.3390/met12050783 - 30 Apr 2022
Cited by 11 | Viewed by 3845
Abstract
In the past two decades, titanium foams have attracted greater interest from the biomedical industry due to their excellent chemical and mechanical biocompatibility when used as biomimetic implants. The porous structure plays an important role in bone adhesion to an implant, allowing its [...] Read more.
In the past two decades, titanium foams have attracted greater interest from the biomedical industry due to their excellent chemical and mechanical biocompatibility when used as biomimetic implants. The porous structure plays an important role in bone adhesion to an implant, allowing its growth into the component. Moreover, the voids reduce the elastic modulus, promoting greater compatibility with the bone, avoiding the stress shielding effect. In this regard, metal injection molding is an attractive process for titanium foams manufacturing due to the high microstructural control and the possibility of producing, on a large scale, parts with complex near-net-shaped structures. In this review, recent discoveries and advantages regarding the processing of titanium powders and alloys via metal injection molding combined with the space holder method are presented. This approach can be used to obtain foams with high biocompatibility with the human body at a microstructural, chemical, and mechanical level. Full article
(This article belongs to the Special Issue Advanced Ti-Based Alloys)
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