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Metals
Special Issues
Metallic Glasses and Composites
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Metallic Glasses and Composites

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6221

Special Issue Editors

Dr. Yannick Champion

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Guest Editor
Universite Grenoble Alpes, Saint Martin d'Heres, France
Interests: metallic glasses; fine-grained metals alloys; nano-foams; mechanical properties; deformation mechanism; microstructure; thermodynamics and chemistry of alloys.
Prof. Dr. Alberto Moreira Jorge Junior

E-Mail Website
Guest Editor
Department of Materials Engineering, Federal University of São Carlos, Via Washington Luiz, Km 235, São Carlos 13565-905, SP, Brazil
Interests: conventional thermomechanical processing; SPD processing (ECAP, HPT, ARB); amorphous and rapidly quenched materials; metastable and nanostructured alloys; amorphous coatings; materials for hydrogen storage; materials for implants; HEAs; physical and numerical simulation; corrosion, mechanical, and electrical properties; microstructural characterization of advanced and conventional materials by electron microscopy
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jian-Zhong Jiang

E-Mail Website
Guest Editor
International Center for New-Structured Materials (ICNSM), Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Interests: metallic glasses; high-entropy alloys from preparation; characterization to properties together with synchrotron radiation techniques and simulations; phase transformation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues

Metallic glass is still a relatively young class of materials, which then present high perspectives but yet full of challenges. It is often mentioned that its bulk form has exceptional mechanical properties (high strength, elastic deformation). However, it suffers from the absence of plastic deformation, low thermal stability, and forming ability. Association of a metallic glass with a crystalline phase has soon been considered with a high potential to produce plasticity, for example. It has also quickly been observed that metallic glass composite opens extended perspectives in terms of functional properties with relevant phase coupling and flexibility in microstructural conception and formation. This special issue focuses on up to date results on metallic glasses and their composites. Articles are welcomed, reporting on the various possible structures, mixing glass and 2nd phase (glass-crystal, glass-glass, metallic, ceramic …, micro/nanostructure), in situ (partial devitrification) and ex-situ (mixing of phases) formation and processing as well as properties (mechanical, magnetic, shape-memory …).

Dr. Yannick Champion
Prof. Alberto Moreira Jorge Junior
Prof. Dr. Jian-Zhong Jiang
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

  • metallic glass
  • composite
  • crystal
  • inorganic
  • organic
  • processing
  • mechanical
  • functional properties

Published Papers (3 papers)

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Research

12 pages, 5171 KiB  
Communication
Microstructure and Mechanical Properties of Composites Obtained by Spark Plasma Sintering of Al–Fe66Cr10Nb5B19 Metallic Glass Powder Mixtures
by Dina V. Dudina, Boris B. Bokhonov, Igor S. Batraev, Vyacheslav I. Kvashnin, Mikhail A. Legan, Aleksey N. Novoselov, Alexander G. Anisimov, Maksim A. Esikov, Arina V. Ukhina, Alexander A. Matvienko, Konstantinos Georgarakis, Guilherme Yuuki Koga and Alberto Moreira Jorge, Jr.
Metals 2021, 11(9), 1457; https://0-doi-org.brum.beds.ac.uk/10.3390/met11091457 - 15 Sep 2021
Cited by 9 | Viewed by 1902
Abstract
At present, metallic glasses are evaluated as alternative reinforcements for aluminum matrix composites. These composites are produced by powder metallurgy via consolidation of metallic glass-aluminum powder mixtures. In most studies, the goal has been to preserve the glassy state of the reinforcement during [...] Read more.
At present, metallic glasses are evaluated as alternative reinforcements for aluminum matrix composites. These composites are produced by powder metallurgy via consolidation of metallic glass-aluminum powder mixtures. In most studies, the goal has been to preserve the glassy state of the reinforcement during consolidation. However, it is also of interest to track the structure evolution of these composites when partial interaction between the matrix and the metallic glass is allowed during sintering of the mixtures. The present work was aimed to study the microstructure and mechanical properties of composites obtained by spark plasma sintering (SPS) of Al-20 vol.% Fe66Cr10Nb5B19 metallic glass mixtures and compare the materials, in which no significant interaction between the matrix and the Fe-based alloy occurred, with those featuring reaction product layers of different thicknesses. Composite materials were consolidated by SPS at 540 and 570 °C. The microstructure and mechanical properties of composites obtained by SPS and SPS followed by forging, composites with layers of interfacial reaction products of different thicknesses, and metallic glass-free sintered aluminum were comparatively analyzed to conclude on the influence of the microstructural features of the composites on their strength. Full article
(This article belongs to the Special Issue Metallic Glasses and Composites)
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13 pages, 16724 KiB  
Article
Influence of Processing Route on the Surface Reactivity of Cu47Ti33Zr11Ni6Sn2Si1 Metallic Glass
by Erika Soares Barreto, Volker Uhlenwinkel, Maximilian Frey, Isabella Gallino, Ralf Busch and Andreas Lüttge
Metals 2021, 11(8), 1173; https://0-doi-org.brum.beds.ac.uk/10.3390/met11081173 - 23 Jul 2021
Cited by 5 | Viewed by 1937
Abstract
Recently, laser additive manufacturing (AM) techniques have emerged as a promising alternative for the synthesis of bulk metallic glasses (BMGs) with massively increased freedom in part size and geometry, thus extending their economic applicability of this material class. Nevertheless, porosity, compositional inhomogeneity, and [...] Read more.
Recently, laser additive manufacturing (AM) techniques have emerged as a promising alternative for the synthesis of bulk metallic glasses (BMGs) with massively increased freedom in part size and geometry, thus extending their economic applicability of this material class. Nevertheless, porosity, compositional inhomogeneity, and crystallization display themselves to be the emerging challenges for this processing route. The impact of these “defects” on the surface reactivity and susceptibility to corrosion was seldom investigated but is critical for the further development of 3D-printed BMGs. This work compares the surface reactivity of cast and additively manufactured (via laser powder bed fusion—LPBF) Cu47Ti33Zr11Ni6Sn2Si1 metallic glass after 21 days of immersion in a corrosive HCl solution. The cast material presents lower oxygen content, homogeneous chemical distribution of the main elements, and the surface remains unaffected after the corrosion experimentation based on vertical scanning interferometry (VSI) investigation. On the contrary, the LPBF material presents a considerably higher reactivity seen through crack propagations on the surface. It exhibits higher oxygen content, heterogeneous chemical distribution, and presence of defects (porosity and cracks) generated during the manufacturing process. Full article
(This article belongs to the Special Issue Metallic Glasses and Composites)
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10 pages, 3774 KiB  
Article
Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass
by Ting Shi, Lanping Huang and Song Li
Metals 2021, 11(4), 579; https://0-doi-org.brum.beds.ac.uk/10.3390/met11040579 - 01 Apr 2021
Viewed by 1538
Abstract
Structural relaxation and nanomechanical behaviors of La65Al14Ni5Co5Cu9.2Ag1.8 bulk metallic glass (BMG) with a low glass transition temperature during annealing have been investigated by calorimetry and nanoindentation measurement. The enthalpy release of this [...] Read more.
Structural relaxation and nanomechanical behaviors of La65Al14Ni5Co5Cu9.2Ag1.8 bulk metallic glass (BMG) with a low glass transition temperature during annealing have been investigated by calorimetry and nanoindentation measurement. The enthalpy release of this metallic glass is deduced by annealing near glass transition. When annealed below glass transition temperature for 5 min, the recovered enthalpy increases with annealing temperature and reaches the maximum value at 403 K. After annealed in supercooled liquid region, the recovered enthalpy obviously decreases. For a given annealing at 393 K, the relaxation behaviors of La-based BMG can be well described by the Kohlrausch-Williams-Watts (KWW) function. The hardness, Young’s modulus, and serrated flow are sensitive to structural relaxation of this metallic glass, which can be well explained by the theory of solid-like region and liquid-like region. The decrease of ductility and the enhancement of homogeneity can be ascribed to the transformation from liquid-like region into solid-like region and the reduction of the shear transition zone (STZ). Full article
(This article belongs to the Special Issue Metallic Glasses and Composites)
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