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Metals
Special Issues
Recent Developments of High-Entropy Alloys and Metallic Glasses
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Recent Developments of High-Entropy Alloys and Metallic Glasses

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 (28 February 2023) | Viewed by 5189

Special Issue Editors

Dr. Jamieson Brechtl

E-Mail Website
Guest Editor
Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Interests: material characterization; materials microstructure; advanced materials; X-ray diffraction; mechanical properties; materials testing; mechanical behavior of materials; heat treatment; irradiation experiments; high entropy alloys; scanning electron microscopy
Special Issues, Collections and Topics in MDPI journals
Prof. Peter K. Liaw

grade E-Mail Website
Guest Editor
Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996-2100, USA
Interests: mechanical behavior; fatigue and fracture behavior; nondestructive evaluation; neutron/synchrotron studies of advanced materials, including bulk metallic glasses; nanostructural materials; high-entropy alloys; superalloys; steels; intermetallics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Bulk metallic glasses and high-entropy alloys are two classes of exotic material systems, which possess desirable properties, such as wear resistance, corrosion resistance, and high strength. The aim of this Special Issue is to publish research articles and reviews on the up-to-date experimental and theoretical results for these types of alloys. Specific topics of interest include, but are not limited to, the following: (i) crystallization kinetics, (ii) advanced characterization techniques, (iii) in situ plastic deformation behavior (including serrated flows), (iv) biocompatibility, (v) mechanical behavior at elevated and cryogenic temperatures, (vi) irradiation effects, (vii) machine learning and high-throughput methods, and (viii) links between mechanical behavior and microstructures. The overarching goal of this Special Issue is to provide a comprehensive platform for the dissemination of new findings, while discussing future directions in the fields of bulk metallic glass and high-entropy alloy research.

Dr. Jamieson Brechtl
Prof. Dr. Peter K. Liaw
Guest Editors

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

  • high-entropy alloys
  • bulk metallic glasses
  • plastic deformation
  • twinning
  • fatigue behavior
  • corrosion behavior
  • irradiation response
  • chemical complexity
  • structural defects
  • crystallization and phase transformations

Published Papers (2 papers)

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Research

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8 pages, 2086 KiB  
Article
3D Printing of Mg-Based Bulk Metallic Glasses with Proper Laser Power and Scanning Speed
by Zijian Zhao, Guang Yang and Kun Zhao
Metals 2022, 12(8), 1318; https://doi.org/10.3390/met12081318 - 05 Aug 2022
Cited by 6 | Viewed by 1564
Abstract
Additive manufacturing allows for the fabrication of large-sized metallic glasses with complex geometries, which overcomes the size limitation due to limited glass-forming ability. To investigate the effect of synthesis parameters on the Mg-based metallic glasses, Mg65Cu20Zn5Y10 [...] Read more.
Additive manufacturing allows for the fabrication of large-sized metallic glasses with complex geometries, which overcomes the size limitation due to limited glass-forming ability. To investigate the effect of synthesis parameters on the Mg-based metallic glasses, Mg65Cu20Zn5Y10 was fabricated by laser-based powder bed fusion under different scanning speeds and laser powers. For high energy density, the samples showed severe crystallization and macrocracks, while for low energy density, the samples contained pore defects and unfused powders. Three-dimensionally printed samples were used for the compression test, and the mechanical properties were analyzed by Weibull statistics. Our work identifies proper parameters for 3D printing Mg-based metallic glasses, which provide a necessary, fundamental basis for the fabrication of 3D-printed Mg-based metallic glass materials with improved performance. Full article
(This article belongs to the Special Issue Recent Developments of High-Entropy Alloys and Metallic Glasses)
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Review

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20 pages, 3081 KiB  
Review
A Review of Biomaterials Based on High-Entropy Alloys
by Thiago Gonçalves de Oliveira, Danilo Valim Fagundes, Patrícia Capellato, Daniela Sachs and Antonio Augusto Araújo Pinto da Silva
Metals 2022, 12(11), 1940; https://doi.org/10.3390/met12111940 - 12 Nov 2022
Cited by 10 | Viewed by 2775
Abstract
Due to its great amount of microstructure and property possibilities as well as its high thermodynamic stability and superior mechanical performance, the new class of material known as high-entropy alloys (HEAs) has aroused great interest in the research community over the last two [...] Read more.
Due to its great amount of microstructure and property possibilities as well as its high thermodynamic stability and superior mechanical performance, the new class of material known as high-entropy alloys (HEAs) has aroused great interest in the research community over the last two decades. Recent works have investigated the potential for applying this material in several strategical conditions such as high temperature structural devices, hydrogen storage, and biological environments. Concerning the biomedical field, several papers have been recently published with the aim of overcoming the limitations of conventional alloys, such as corrosion, fracture, incompatibility with bone tissue, and bacterial infection. Due to the low number of available literature reviews, the aim of the present work is to consolidate the information related to high-entropy alloys developed for biomedical applications (bioHEAs), mainly focused on their microstructure, mechanical performance, and biocompatibility. Topics such as phases, microstructure, constituent elements, and their effect on microstructure and biocompatibility, hardness, elastic modulus, polarization resistance, and corrosion potential are presented and discussed. The works indicate that HEAs have high potential to act as candidates for complementing the materials available for biomedical applications. Full article
(This article belongs to the Special Issue Recent Developments of High-Entropy Alloys and Metallic Glasses)
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