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Structure and Properties of Metallic Glasses
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Structure and Properties of Metallic Glasses

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: 20 July 2024 | Viewed by 1521

Special Issue Editors

Prof. Dr. Qiang Li

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Guest Editor
Xinjiang Key Laboratory of Solid State Physics and Devices, School of Physics and Technology, Xinjiang University, Urumqi 830046, China
Interests: bulk metallic glasses; nanocrystalline soft magnetic alloys; amorphous alloy coating; high-entropy alloys
Prof. Dr. Si Lan

E-Mail Website
Guest Editor
Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: metallic glasses; high-entropy alloys; phase transition in metastable liquids and alloys; structure characterization in metastable liquids and alloys; structure–property relationships in advanced nano-structural and functional alloys; micro-nano hierarchical constructions of metastable alloys
Prof. Dr. Weiming Yang

E-Mail Website
Guest Editor
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, China
Interests: bulk metallic glasses; nanocrystalline soft magnetic alloys; high-entropy alloys
Special Issues, Collections and Topics in MDPI journals
Dr. Zhenduo Wu

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Guest Editor
Research Office, City University of Hong Kong (Dongguan), Dongguan, China
Interests: structure and phase transformation of amorphous materials; advanced scattering techniques

Special Issue Information

Dear Colleagues,

Metallic glasses are a novel class of metallic materials with long-range-disorder and short-range-order atomic arrangements and possess unique mechanical and functional properties, making them a popular topic in the field of materials research. However, thus far, there has been a lack of effective theoretical models and characterization methods for determining the microscopic atomic arrangements of metallic glasses, significantly hindering the research on these materials and their application. Therefore, exploring the atomic arrangement, developing effective structure models, and establishing the structure–property relationships of metallic glasses is of great significance.

This Special Issue will focus on original research articles and review papers on the theoretical modeling of the atomic arrangement of metallic glasses. We welcome papers that employ novel and advanced experimental techniques and computational simulations to explore the atomic arrangement of metallic glasses, and that utilize machine learning to explore the structural characteristics and establish the structure–property relationships of metallic glasses, as well as phase transitions in metallic liquids and alloys and the properties of metallic glasses; we are particularly interested in papers that establish the relationship between the atomic-level structure and properties of metallic glasses.

We are pleased to invite you to submit a manuscript to this Special Issue in the form of a full paper, short communication, or topic review.

Prof. Dr. Qiang Li
Prof. Dr. Si Lan
Prof. Dr. Weiming Yang
Dr. Zhenduo Wu
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. Materials is an international peer-reviewed open access semimonthly 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

  • atomic arrangement of metallic glasses
  • long-range- and short-range-order structure of metallic glasses
  • theoretical modeling of metallic glasses
  • characterization methods for metallic glasses
  • computational simulation of metallic glasses
  • machine learning for structure–property mapping of metallic glasses
  • properties of metallic glasses
  • relationship between atomic-level structure and properties of metallic glasses
  • phase transition in metallic liquids and alloys

Published Papers (3 papers)

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Research

14 pages, 1621 KiB  
Article
Surface Modification of Zr48Cu36Al8Ag8 Bulk Metallic Glass through Glow Discharge Plasma Nitriding
by Krzysztof Kulikowski, Piotr Błyskun, Tomasz Borowski and Tadeusz Kulik
Materials 2024, 17(12), 2850; https://doi.org/10.3390/ma17122850 - 11 Jun 2024
Viewed by 194
Abstract
Bulk metallic glasses are modern engineering materials with unique functional properties. Zr-based alloys are particularly attractive as they exhibit high glass forming ability as well as good mechanical properties. Due to their relatively high thermal stability, reaching as much as 400 °C, they [...] Read more.
Bulk metallic glasses are modern engineering materials with unique functional properties. Zr-based alloys are particularly attractive as they exhibit high glass forming ability as well as good mechanical properties. Due to their relatively high thermal stability, reaching as much as 400 °C, they can be surface-treated in low-temperature plasma to further improve their mechanical properties. The subject of this study was to determine the influence of the technological parameters of nitriding in low-temperature plasma on the structure and mechanical properties of Zr48Cu36Al8Ag8 bulk metallic glass. In the course of this study, the influence of the ion accelerating voltage on the structure and micromechanical properties of the bulk metallic glass was analyzed. The produced samples were characterized in terms of nanohardness, layer adhesion by using the scratch test, and wear resistance by using the ball-on-disc method. As a result of low-temperature plasma nitriding, a significant increase in the surface nanohardness of the Zr48Cu36Al8Ag8 bulk metallic glass was obtained. The produced layers exhibited high adhesion to the substrate and they improved the wear resistance of the glass. The present study indicates the possibility of modifying the surface properties of bulk metallic glasses by using diffusion processes in low-temperature plasma without substrate crystallization. Full article
(This article belongs to the Special Issue Structure and Properties of Metallic Glasses)
12 pages, 4244 KiB  
Article
Deformation-Induced Crystal Growth or Redissolution, and Crystal-Induced Strengthening or Ductilization in Metallic Glasses Containing Nanocrystals
by Tittaya Thaiyanurak, Saowaluk Soonthornkit, Olivia Gordon, Zhenxing Feng and Donghua Xu
Materials 2024, 17(11), 2567; https://doi.org/10.3390/ma17112567 - 27 May 2024
Viewed by 453
Abstract
It is generally known that the incorporation of crystals in the glass matrix can enhance the ductility of metallic glasses (MGs), at the expense of reduced strength, and that the deformation of MGs, particularly during shear banding, can induce crystal formation/growth. Here, we [...] Read more.
It is generally known that the incorporation of crystals in the glass matrix can enhance the ductility of metallic glasses (MGs), at the expense of reduced strength, and that the deformation of MGs, particularly during shear banding, can induce crystal formation/growth. Here, we show that these known trends for the interplay between crystals and deformation of MGs may hold true or become inverted depending on the size of the crystals relative to the shear bands. We performed molecular dynamics simulations of tensile tests on nanocrystal-bearing MGs. When the crystals are relatively small, they bolster the strength rather than the ductility of MGs, and the crystals within a shear band undergo redissolution as the shear band propagates. In contrast, larger crystals tend to enhance ductility at the cost of strength, and the crystal volume fraction increases during deformation. These insights offer a more comprehensive understanding of the intricate relationship between deformation and crystals/crystallization in MGs, useful for fine-tuning the structure and mechanical properties of both MGs and MG–crystal composites. Full article
(This article belongs to the Special Issue Structure and Properties of Metallic Glasses)
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12 pages, 3785 KiB  
Article
Effect of Strain Rate on Mechanical Deformation Behavior in CuZr Metallic Glass
by Beibei Fan and Maozhi Li
Materials 2024, 17(11), 2507; https://doi.org/10.3390/ma17112507 - 23 May 2024
Viewed by 310
Abstract
Tensile tests were performed on Cu64Zr36 metallic glass at strain rates of 107/s, 108/s, and 109/s via classical molecular dynamics simulations to explore the underlying mechanism by which strain rate affects deformation behavior. It [...] Read more.
Tensile tests were performed on Cu64Zr36 metallic glass at strain rates of 107/s, 108/s, and 109/s via classical molecular dynamics simulations to explore the underlying mechanism by which strain rate affects deformation behavior. It was found that strain rate has a great impact on the deformation behavior of metallic glass. The higher the strain rate is, the larger the yield strength. We also found that the strain rate changes the atomic structure evolution during deformation, but that the difference in the atomic structure evolution induced by different strain rates is not significant. However, the mechanical response under deformation conditions is found to be significantly different with the change in strain rate. The average von Mises strain of a system in the case of 107/s is much larger than that of 109/s. In contrast, more atoms tend to participate in deformation with increasing strain rate, indicating that the strain localization degree is more significant in cases of lower strain rates. Therefore, increasing the strain rate reduces the degree of deformation heterogeneity, leading to an increase in yield strength. Further analysis shows that the structural features of atomic clusters faded out during deformation as the strain rate increased, benefiting more homogeneous deformation behavior. Our findings provide more useful insights into the deformation mechanisms of metallic glass. Full article
(This article belongs to the Special Issue Structure and Properties of Metallic Glasses)
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