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Special Issue "Phase and Structure Analysis of Alloys and Metal Matrix Composites"

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

Deadline for manuscript submissions: 20 September 2023 | Viewed by 1995

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Special Issue Editors

Prof. Dr. Małgorzata Karolus

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Institute of Materials Engineering, Faculty of Science and Technology, University of Silesia in Katowice, 40-007 Katowice, Poland
Interests: mechanical alloying; X-ray diffraction; diffuse scattering; RDF; PDF; rietveld refinement; structure determination; residual stress
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Prof. Dr. Sabina Lesz

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Department of Engineering Materials and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland
Interests: materials engineering; amorphous and nanostructured materials; soft magnetic materials; steels; degradable biomaterials; heat treatment; mechanical alloying; powder metallurgy; fracture morphology
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Special Issue Information

Dear Colleagues,

We cordially invite you to publish original scientific articles describing the results of research works or review articles in the Special Issue entitled "Phase and Structure Analysis of Alloys and Metal Matrix Composites". New metal matrix alloys and composites are materials that can have unique physical, chemical, and mechanical properties. This allows them to be used in numerous and advanced applications. These materials are in the mainstream of global research; therefore, in order to better understand the mechanisms occurring in such materials, and thus model and design them more effectively, it is necessary to fully understand and describe their structure and relate it to the specific properties of these materials.

Therefore, the submitted works may concern both innovative engineering materials, alloys, and composites with modified structures and physico-chemical properties, as well as original technological modifications used in the manufacturing methodology. Papers can also focus on developing new technological solutions and mathematical models to formulate new conclusions.

This Special Issue will provide a detailed review of recent research and developments in the phase and structural analysis of novel alloys and metal matrix composites. We are pleased to invite you to submit your manuscript for this Special Issue. Full articles, announcements, and reviews related to structural characterization are welcome.

Prof. Dr. Małgorzata Karolus
Prof. Dr. Sabina Lesz
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 2300 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

alloys
metal matrix composites
structural characterization
phase analysis
rietveld refinement
SEM, TEM
XRD

Published Papers (3 papers)

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Research

Open AccessArticle

Recrystallization of Hot-Rolled 2A14 Alloy during Semisolid Temperature Annealing Process

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Materials 2023, 16(7), 2796; https://doi.org/10.3390/ma16072796 - 31 Mar 2023

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Abstract

In this study, in order to provide proper parameters for the preparation of semisolid billets, the semisolid annealing of hot-rolled 2A14 Al alloy was investigated. The microstructure was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) with an X-ray energy dispersive spectrometer (EDS) and electron backscattered diffraction (EBSD), and scanning transmission electron microscopy (STEM). The XRD results showed that, with an increase in temperature, the θ-Al2Cu equilibrium gradually dissolved in the matrix. The EDS results of SEM and STEM showed a coarse θ-Al2Cu phase, ultrafine precipitate Al(MnFeSi) or (Mn, Fe)Al6 phase, and atomic clusters in the microstructure. The EBSD results showed that the recrystallization mechanism was dominated by continuous static recrystallization (CSRX), homogeneous nucleation occurred when the sample was heated to near solidus temperature, and CSRX occurred at a semisolid temperature. In the process of recrystallization, the microtexture changed from the preferred orientation to a random orientation. Various experimental results showed that static recrystallization (SRX) occurred at a semisolid temperature due to the blocking effect of atomic clusters on the dislocation slip, and the Zener drag effect of fine precipitates on low-angle grain boundaries (LAGBs) disappeared with melting at a semisolid temperature. Full article

(This article belongs to the Special Issue Phase and Structure Analysis of Alloys and Metal Matrix Composites)

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Open AccessArticle

Characteristics of Mg-Based Sintered Alloy with Au Addition

Sabina Lesz

Małgorzata Karolus

Adrian Gabryś

Bartłomiej Hrapkowicz

and

Materials 2023, 16(5), 1915; https://doi.org/10.3390/ma16051915 - 25 Feb 2023

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Abstract

The magnesium-based alloys produced by mechanical alloying (MA) are characterized by specific porosity, fine-grained structure, and isotropic properties. In addition, alloys containing magnesium, zinc, calcium, and the noble element gold are biocompatible, so they can be used for biomedical implants. The paper assesses selected mechanical properties and the structure of the Mg₆₃Zn₃₀Ca₄Au₃ as a potential biodegradable biomaterial. The alloy was produced by mechanical synthesis with a milling time of 13 h, and sintered via spark-plasma sintering (SPS) carried out at a temperature of 350 °C and a compaction pressure of 50 MPa, with a holding time of 4 min and a heating rate of 50 °C∙min⁻¹ to 300 °C and 25 °C∙min⁻¹ from 300 to 350 °C. The article presents the results of the X-ray diffraction (XRD) method, density, scanning electron microscopy (SEM), particle size distributions, and Vickers microhardness and electrochemical properties via electrochemical impedance spectroscopy (EIS) and potentiodynamic immersion testing. The obtained results reveal the compressive strength of 216 MPa and Young’s modulus of 2530 MPa. The structure comprises MgZn₂ and Mg₃Au phases formed during the mechanical synthesis, and Mg₇Zn₃ that has been formed during the sintering process. Although MgZn₂ and Mg₇Zn₃ improve the corrosion resistance of the Mg-based alloys, it has been revealed that the double layer formed because of contact with the Ringer’s solution is not an effective barrier; hence, more data and optimization are necessary. Full article

(This article belongs to the Special Issue Phase and Structure Analysis of Alloys and Metal Matrix Composites)

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Open AccessArticle

Microstructure and Mechanical Properties of Core-Shell B₄C-Reinforced Ti Matrix Composites

and

Materials 2023, 16(3), 1166; https://doi.org/10.3390/ma16031166 - 30 Jan 2023

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Abstract

Composite material uses ceramic reinforcement to add to the metal matrix to obtain higher material properties. Structural design is an important direction of composite research. The reinforcement distribution of the core-shell structure has the unique advantages of strong continuity and uniform stress distribution. In this paper, a method of preparing boron carbide (B₄C)-coated titanium (Ti) powder particles by ball milling and preparing core-shell B₄C-reinforced Ti matrix composites by Spark Plasma Sintering was proposed. It can be seen that B₄C coated on the surface of the spherical Ti powder to form a shell structure, and B₄C had a certain continuity. Through X-ray diffraction characterization, it was found that B₄C reacted with Ti to form layered phases of titanium boride (TiB) and titanium carbide (TiC). The compressive strength of the composite reached 1529.1 MPa, while maintaining a compressive strain rate of 5%. At the same time, conductivity and thermal conductivity were also characterized. The preparation process of the core-shell structure composites proposed in this paper has high feasibility and universality, and it is expected to be applied to other ceramic reinforcements. This result provides a reference for the design, preparation and performance research of core-shell composite materials. Full article

(This article belongs to the Special Issue Phase and Structure Analysis of Alloys and Metal Matrix Composites)

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