Special Issue "Mechanical and Physical Properties of Metallic Composites"

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

Deadline for manuscript submissions: 31 December 2019.

Special Issue Editor

Prof. Dr. Pavel Lukáč
E-Mail Website
Guest Editor
Charles University, Faculty of Mathematics and Physics, Department of Physics of Materials, Ke Karlovu 3, 121 16 Praha 2, Czech Republic
Interests: Metallic materials; Single crystals, polycrystals, submicrocrystalline materials, nanocrystals, composites; grains, grain boundary, crystal defects; Deformation behaviour, solid solution hardening, precipitation strengthening, high temperature plasticity, creep, hardening/softening, thermally activated flow, dislocations, climb of dislocations, twins, superplasticity; Properties, mechanical properties, thermal conductivity, electrical conductivity, thermal expansion, damping, microstructure; Severe plastic deformation, accumulative roll bonding, equal-channel angular pressing, high-pressure torsion
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

In the recent decades, many results related to metallic composites have been reported. The final properties of composites are strongly influenced by those of both their constituent phases (metallic matrix and reinforcement) and by the processing technique. The matrix material is either a metal or an alloy. The chemical composition of the matrix is a significant factor that affects the composite microstructure. Al and its alloys, Mg and its alloys, and Ti and its alloys have been used as matrix materials because of their light weight. On the other hand, Cu and Ni have been used for their effects on the final mechanical and physical properties. The average grain size is an important parameter influencing the matrix microstructure and, therefore, the matrix mechanical (and physical) properties.

Reinforcements have a significant effect on the composite behavior. While the mechanical and physical properties of the reinforcements (strength, thermal expansion, electrical conductivity, etc.) are dictated by their chemical nature (metal, ceramic, polymer, carbon-nanotube), their geometric and topological properties (shape, size, volume fraction, orientation, distribution) can be changed during fabrication. Composite manufacturing has a very substantial effect on the properties of a composite.

In spite of many published papers, there is no generally accepted model for metallic composite strengthening. The physical properties of a composite are affected by a combination of the matrix and the reinforcements properties. The coefficient of thermal expansion, thermal and electrical conductivity, diffusion, damping, are significant for the resultant physical properties. Their knowledge is very important for applications in different fields. Many factors and mechanisms determine a composite behavior. The synergetic operation of these mechanisms should be studied.

The aim of this Special Issue is to extend our current knowledge of metallic composite behavior. Your contributions are welcome.

Prof. Dr. Pavel Lukáč
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 papers will be 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 1800 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

  • Mechanical and physical properties of metallic materials
  • Solid solution hardening
  • Mechanical testing
  • Superplasticity, Jerky flow, Metallic composites
  • Nanomaterials, Deformation mechanisms
  • Magnesium alloys, Aluminium alloys, Severe plastic deformation

Published Papers (5 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Open AccessArticle
Magnetostrictive Properties of the Grain-Oriented Silicon Steel Sheet under DC-Biased and Multisinusoidal Magnetizations
Materials 2019, 12(13), 2156; https://doi.org/10.3390/ma12132156 - 04 Jul 2019
Abstract
As an intrinsic property, elasticity of soft material is affected significantly by the externally applied alternating magnetic field. Magnetostrictive properties of the grain-oriented (GO) silicon steel under DC-biased and multisinusoidal magnetizations are measured by using a laser-based measuring system. Magnetostriction curves of the [...] Read more.
As an intrinsic property, elasticity of soft material is affected significantly by the externally applied alternating magnetic field. Magnetostrictive properties of the grain-oriented (GO) silicon steel under DC-biased and multisinusoidal magnetizations are measured by using a laser-based measuring system. Magnetostriction curves of the GO silicon steel sheet under different magnetizations are obtained and the influence of frequency and DC bias on the magnetostrictive property is observed and analyzed based on the measured data. In addition, the spectrum of magnetostriction under harmonic magnetization is obtained, and the acoustic noise level of the GO silicon steel sheet represented by the A-weighted decibel value caused by magnetostriction is measured under DC-biased and multisinusoidal magnetizations. The measurement results are applied to the simulation of the three-limb laminated core model, and the effects of DC bias and harmonics on magnetic flux density and displacement are analyzed. Full article
(This article belongs to the Special Issue Mechanical and Physical Properties of Metallic Composites)
Show Figures

Figure 1

Open AccessArticle
Microstructure and Mechanical Properties of Galvanized-45 Steel/AZ91D Bimetallic Material by Liquid-Solid Compound Casting
Materials 2019, 12(10), 1651; https://doi.org/10.3390/ma12101651 - 21 May 2019
Cited by 1
Abstract
A connection between hot-dip galvanized 45 steel and AZ91D was achieved by liquid-solid compound casting to achieve one material with a better mechanical performance and a light weight. The microstructure and properties of galvanized-steel/AZ91D bimetallic materials were investigated in this study. A scanning [...] Read more.
A connection between hot-dip galvanized 45 steel and AZ91D was achieved by liquid-solid compound casting to achieve one material with a better mechanical performance and a light weight. The microstructure and properties of galvanized-steel/AZ91D bimetallic materials were investigated in this study. A scanning electron microscopy (SEM), an energy dispersive spectroscopy (EDS), and an X-ray diffraction (XRD) were applied to analyze the microstructure evolution and formation mechanism of the galvanized 45 steel/AZ91D interface zone which could be divided into three layers. Among three different layers, the layer close to AZ91D was composed of α-Mg and an eutectic structure (α-Mg + MgZn). The intermediate layer was comprised of an eutectic structure (α-Mg + MgZn), and the layer adjacent to 45 steel consisted of α-Mg and FeAl3. Furthermore, galvanized-45 steel/AZ91D bimetallic material had better shear strength than the bare-45 steel/AZ91D metallic material which can indicate that owing to the formation of metallurgical bonding, the adhesive strength of galvanized-steel and AZ91D was improved to 11.81 MPa. In addition, the fact that corrosion potential increased from −1.493 V to −1.143 V and corrosion current density changed from 3.015 × 10−5 A/cm2 to 1.34 × 10−7 A/cm2 implied that the corrosion resistance of galvanized-steel/AZ91D was much better than AZ91D. Full article
(This article belongs to the Special Issue Mechanical and Physical Properties of Metallic Composites)
Show Figures

Graphical abstract

Open AccessArticle
Thermo–Mechanical Behavior and Constitutive Modeling of In Situ TiB2/7050 Al Metal Matrix Composites Over Wide Temperature and Strain Rate Ranges
Materials 2019, 12(8), 1212; https://doi.org/10.3390/ma12081212 - 13 Apr 2019
Abstract
The thermo–mechanical behavior of in situ TiB2/7050 Al metal matrix composites is investigated by quasi-static and Split Hopkinson Pressure Bar compression tests over a wide range of temperature (20~30 °C) and strain rate (0.001~5000 s−1). Johnson–Cook and Khan–Liu constitutive [...] Read more.
The thermo–mechanical behavior of in situ TiB2/7050 Al metal matrix composites is investigated by quasi-static and Split Hopkinson Pressure Bar compression tests over a wide range of temperature (20~30 °C) and strain rate (0.001~5000 s−1). Johnson–Cook and Khan–Liu constitutive models determined from curve fitting and constrained optimization are used to predict the flow stress during deformation. In addition, another Johnson–Cook model calculated from an orthogonal cutting experiment and finite element simulation is also compared in this study. The prediction capability of these models is compared in terms of correlation coefficient and average absolute error. Due to the assumptions in orthogonal cutting theory, the determined Johnson–Cook model from cutting cannot describe the material deformation behavior accurately. The results also show that the Khan–Liu model has better performance in characterizing the material’s thermo–mechanical behavior. Full article
(This article belongs to the Special Issue Mechanical and Physical Properties of Metallic Composites)
Show Figures

Figure 1

Open AccessArticle
Densification Mechanism of Soft Magnetic Composites Using Ultrasonic Compaction for Motors in EV Platforms
Materials 2019, 12(5), 824; https://doi.org/10.3390/ma12050824 - 11 Mar 2019
Abstract
In this paper, the densification mechanism of ultrasonic compaction was analyzed using a force balance model. Ultrasonic compaction is quite a promising way to solve the lower mechanical property problem of green compact in the compaction process, although it has some obstacles to [...] Read more.
In this paper, the densification mechanism of ultrasonic compaction was analyzed using a force balance model. Ultrasonic compaction is quite a promising way to solve the lower mechanical property problem of green compact in the compaction process, although it has some obstacles to overcome for its various applications. Our model proposes that the resultant density is achieved as the applied and resistance forces reach the equilibrium state. Based on the proposed model, the ultrasonic compaction increases the density of green compact by reducing the internal friction between the powder and compaction die, as well as the internal friction among particles themselves. It was also found that during the powder compaction, the ultrasonic vibration mostly contributes to slipping and the rearrangement of the particles. Full article
(This article belongs to the Special Issue Mechanical and Physical Properties of Metallic Composites)
Show Figures

Figure 1

Open AccessArticle
First-Principles Investigation of Adsorption of Ag on Defected and Ce-doped Graphene
Materials 2019, 12(4), 649; https://doi.org/10.3390/ma12040649 - 21 Feb 2019
Abstract
To enhance the wettability between Ag atoms and graphene of graphene-reinforced silver-based composite filler, the adsorption behavior of Ag atoms on graphene was studied by first-principles calculation. This was based on band structure analysis, both p-type doping and n-type doping form, of the [...] Read more.
To enhance the wettability between Ag atoms and graphene of graphene-reinforced silver-based composite filler, the adsorption behavior of Ag atoms on graphene was studied by first-principles calculation. This was based on band structure analysis, both p-type doping and n-type doping form, of the vacancy-defected and Ce-doped graphene. It was verified by the subsequent investigation on the density of states. According to the charge transfer calculation, p-type doping can promote the electron transport ability between Ag atoms and graphene. The adsorption energy and population analysis show that both defect and Ce doping can improve the wettability and stability of the Ag-graphene system. Seen from these theoretical calculations, this study provides useful guidance for the preparation of Ag-graphene composite fillers. Full article
(This article belongs to the Special Issue Mechanical and Physical Properties of Metallic Composites)
Show Figures

Figure 1

Back to TopTop