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Special Issue Editor

Special Issue Information

Dear Colleagues,

In the past of 20 years, magnesium alloys and composites have gained superior prominence in weight-critical applications in the aerospace, automotive, and transportation sectors. In recent times, magnesium’s ability to degrade in the human body has made it a potential material for orthopedic implants. In research, several different approaches have been used to improve the properties of magnesium-based materials by means of alloying, composite technology, heat treatment, and coatings, among others. Using microstructural control, the overall properties of magnesium and its alloys have been improved by researchers around the world. Furthermore, the use of unique processing technologies such as additive manufacturing, microwave sintering, extrusion, etc. have been able to deliver high-performance, lightweight magnesium-based materials. The combined effect of processing technology and novel alloying element or reinforcements can be vital in achieving greater acceptance of magnesium-based materials in industry.

Accordingly, this Special Issue aims to explore research articles focused on the use of novel processing technologies and their effect on the properties of the developed magnesium-based materials. Review articles are also welcome.

Topics falling under the scope of the issue, among others, are:

(a) Novel processing of magnesium-based materials;

(b) Structure–property relationship in magnesium-based materials;

(d) Magnesium processing through recycling;

(e) Surface property characterization (corrosion, tribology, etc.) of magnesium-based materials.

Dr. Parande Gururaj
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

Magnesium
Processing
Mechanical properties
Microstructure
Heat Treatment
Corrosion behavior
Machinability
Tribology
Biocompatibility
Applications

Published Papers (2 papers)

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Research

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12 pages, 5498 KiB

Open AccessArticle

Mg-Ni-Nb₂O₅ Composite Produced by High-Pressure Torsion

by Martin Fibela-Esparza, Armando Salinas-Rodriguez, Juan Méndez-Nonell, José Martin Herrera-Ramirez, Yoshikazu Todaka and José Gerardo Cabañas-Moreno

Metals 2022, 12(10), 1684; https://doi.org/10.3390/met12101684 - 9 Oct 2022

Viewed by 1429

Abstract

A Mg-based composite material has been produced by the consolidation at room temperature of a Mg-5wt.% Ni-2wt.% Nb₂O₅ powder mixture subjected to high-pressure torsion (HPT), one of the processing methods to induce severe plastic deformations. The microstructure, density, and microhardness of the consolidated disks were characterized after the application of up to 30 revolutions in torsion under compression stresses of 3 and 5 GPa. According to the density measurements, the composite was consolidated in full after the application of five revolutions, although disks subjected to only one revolution exhibited densities close to the maximum measured value. On the other hand, grain size and microhardness measurements showed that differences existed at locations near the center and the periphery of the HPT-processed disks. Under the stress of 5 GPa, the grain size in the central regions stabilized at about 0.35 μm after five revolutions, while at the peripherical regions it gradually decreased with an increasing number of revolutions down to about 0.15 μm after 30 revolutions. In turn, the microhardness measured along a diametral cross section steadily increased with the number of revolutions between 1 and 10 revolutions, maintaining a gradient from the center to the periphery in all cases. With the application of 20 and 30 revolutions, only the peripheral regions increased considerably in hardness. It was discovered that the magnesium particles in the initial powder mixture had formed an oxide—hydroxide surface layer, which changed the expected final density of the consolidated material by about 2 to 4.5%. This superficial contamination of the Mg powders did not prevent the material from achieving full consolidation. Full article

(This article belongs to the Special Issue Novel Processing of Magnesium Alloys and Composites–Properties and Applications)

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Graphical abstract

Review

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33 pages, 3338 KiB

Open AccessReview

Development of Carbon Nanotube (CNT)-Reinforced Mg Alloys: Fabrication Routes and Mechanical Properties

by Gaurav Upadhyay, Kuldeep K. Saxena, Shankar Sehgal, Kahtan A. Mohammed, Chander Prakash, Saurav Dixit and Dharam Buddhi

Metals 2022, 12(8), 1392; https://doi.org/10.3390/met12081392 - 22 Aug 2022

Cited by 39 | Viewed by 2299

Abstract

Properties such as superior specific strength, being imponderous, and the ability to reprocess are the key features that have drawn attention to magnesium. In the last few years, applications such as automotive, aerospace, and medical applications have been seeking light-weight equipment, and light-weight materials are required for making them. These demands were matched by developing metal matrix composites with magnesium as a base and reinforced with carbon nanotubes (CNTs), grapheme nanoplatelets (GNPs), or ceramic nanoparticles. CNTs have been adopted for developing high-strength metal matrix composites (MMCs) because of their delicately superior thermal conductivity, surface-to-volume ratio, and tensile strength, but lower density. In developing high-performance light-weight magnesium-based MMCs, a small number of CNTs result in refined properties. However, making Mg-based MMCs has specific challenges, such as achieving uniform reinforcement distribution, which directly relates to the processing parameters. The composition of CNT, CNT sizes, their uniform distribution, Mg-CNT interfacial bonding, and their in-between alignment are the characteristic deciding factors of Mg-CNT MMCs. The current review article studies the modern methods to develop Mg-CNT MMCs, specifications of the developed MMCs, and their vital applications in various fields. This review focuses on sifting and summarizing the most relevant studies carried out on the methods to develop Mg-CNT metal matrix composites. The article consists of the approach to subdue the tangled situations in highlighting the Mg-CNT composites as imminent fabrication material that is applicable in aerospace, medical, and automotive fields. Full article

(This article belongs to the Special Issue Novel Processing of Magnesium Alloys and Composites–Properties and Applications)

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