Studies on Microstructure and Mechanical Properties of Metal Matrix Composites

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Matrix Composites".

Deadline for manuscript submissions: 30 July 2024 | Viewed by 6611

Special Issue Editor


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Guest Editor
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Interests: MMC; FEM; mechanical properties; density functional theory

Special Issue Information

Dear Colleagues,

Metal matrix composites are materials formed by metallurgical bonding at an interface using composite technology, or multiple metals with different physical and mechanical properties. They can greatly improve the thermal expansion, strength, fracture toughness, impact toughness, abrasion resistance, electrical properties, magnetic properties and other properties of a single metal material, so they are widely used in petroleum, the chemical industry, shipping, metallurgy, mining, machinery manufacturing power, water conservancy, transportation, environmental protection, pressure vessel manufacturing, food, brewing, and the pharmaceutical industry, in addition to other industrial fields.

This Special Issue aims to discuss the microstructure and mechanical properties of metal matrix composites from different perspectives. Papers related to processing technology, mechanical behavior modeling, material microstructure characterization, surface interfaces, test solutions, advanced material development, design and manufacturing processes and their applications in various fields of the national economy are welcome for submission. This is an excellent opportunity for scientists and engineers of metal matrix composites all over the world to publish their latest research achievements in relation to various aspects of metal matrix composite performance characterization and processing technology.

Dr. Mingjun Peng
Guest Editor

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Keywords

  • MMC
  • mechanical properties
  • microstructure
  • FEM
  • interfaces
  • density functional theory
  • material and process modeling

Published Papers (6 papers)

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Research

15 pages, 7872 KiB  
Article
Solid-State Synthesis of SiC Particle-Reinforced AZ91D Composites: Microstructure and Reinforcement Mechanisms
by Qian Shi, Pengxing Cui, Maoliang Hu, Fei Wang, Hongyu Xu and Xiaobing Zhou
Metals 2024, 14(4), 434; https://doi.org/10.3390/met14040434 - 7 Apr 2024
Viewed by 754
Abstract
Safe and efficient recycling of industrially generated machined chips is a high-priority technological issue. In this study, the effect of SiC particles (SiCp) on the microstructure and mechanical properties of SiCp/AZ91D composites is systematically analyzed, and the reinforcement mechanism of SiCp on composites [...] Read more.
Safe and efficient recycling of industrially generated machined chips is a high-priority technological issue. In this study, the effect of SiC particles (SiCp) on the microstructure and mechanical properties of SiCp/AZ91D composites is systematically analyzed, and the reinforcement mechanism of SiCp on composites is investigated. Different contents of SiCp/AZ91D composites are fabricated by solid-state synthesis. The results show that the incorporation of SiCp refined the grains of SiCp/AZ91D composites, which is related to the uniform distribution of SiCp at the grain boundaries. The strong bonding of SiCp with the AZ91D matrix inhibited the generation and extension of cracks, which led to the simultaneous increase in the yield strength (YS) and elongation (EL) of the SiCp/AZ91D composites. The mechanical properties of the 3 wt.% SiCp/AZ91D composites are the most superior, with an average grain size, Vickers hardness, ultimate tensile strength (UTS), YS, and EL of 6.69 ± 4.48 μm, 89.5 ± 2.5 HV, 341 ± 11 MPa, 172 ± 8 MPa, and 4.43 ± 0.18%, respectively. The reinforcement mechanisms of SiCp/AZ91D composites are mainly grain refinement and dislocation strengthening. Solid-state synthesis is an effective method for recycling magnesium alloy chips. Full article
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16 pages, 5703 KiB  
Article
Numerical Simulation of Squeeze-Casting SiC3D/Al Ceramic Matrix Composites
by Yangwei Wang, Fangzhou Zhang, Sijia Feng, Jiawei Bao, Yanni Gong, Chunyuan Yuan and Denghui Zhao
Metals 2024, 14(2), 172; https://doi.org/10.3390/met14020172 - 30 Jan 2024
Viewed by 878
Abstract
In this study, the filling and solidification processes of squeeze-casting SiC3D/Al composites were analyzed by the ProCAST simulation software (ver. 2018.0). A practical squeeze-casting experiment was conducted to verify the accuracy of the simulation results. A series of orthogonal experiments were [...] Read more.
In this study, the filling and solidification processes of squeeze-casting SiC3D/Al composites were analyzed by the ProCAST simulation software (ver. 2018.0). A practical squeeze-casting experiment was conducted to verify the accuracy of the simulation results. A series of orthogonal experiments were conducted on the initial preheating temperature of various components to identify the optimal parameters in order to achieve better porosity and stress concentration values. According to the results and analyses, the preheating temperature of the mold was the most important determining factor. Under a pouring temperature of 700 °C, mold preheating temperature of 200 °C, and SiC skeleton preheating temperature of 600 °C, the maximum principal stress at the bottom of the products was decreased by about 41.9%, and the shrinkage volume inside the composite was decreased about by about 61.6%. Thus, by adjusting the initial preheating temperature of various components, the squeeze-casting SiC3D/Al composites could achieve better performance and fewer internal defects. Full article
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13 pages, 2977 KiB  
Article
Influence of the Hot-Pressing Rate on the Interface Feature and Mechanical Properties of Mg/Al Composite Plates
by Chuande Guo, Bo Song, Shijun Tan, Haohua Xu, Meng Wang, Tingting Liu, Ning Guo and Shengfeng Guo
Metals 2024, 14(1), 23; https://doi.org/10.3390/met14010023 - 24 Dec 2023
Viewed by 908
Abstract
In this work, Mg/Al composite plates were prepared by direct hot pressing under atmospheric conditions. The impacts of the strain rate (from 3.3 × 10−4 s−1 to 1.0 × 10−2 s−1) on the interface and bonding strength were [...] Read more.
In this work, Mg/Al composite plates were prepared by direct hot pressing under atmospheric conditions. The impacts of the strain rate (from 3.3 × 10−4 s−1 to 1.0 × 10−2 s−1) on the interface and bonding strength were investigated. Results showed that Mg/Al composite plates can be successfully fabricated by hot pressing with a 40% strain at 350 °C. The strain rate will largely affect the interfacial bonding quality and the structure of the interface. As the strain rate decreases, the thickness of the diffusion layer at the interface becomes thicker, and the composition of the interface gradually changes from a mixed zone of Mg17Al12 and Mg2Al3 to two single-phase zones. In all samples, the Mg2Al3 phase layer at the interface tends to exhibit brittle fracture during shear. When the strain rate of the hot pressing reduces to 3.3 × 10−4 s−1, the single-phase zone of Mg2Al3 at the interface breaks up. In the present work, the Mg/Al plate hot pressed at a strain rate of 1.0 × 10−3 s−1 demonstrates the highest shear strength. Full article
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18 pages, 18883 KiB  
Article
Two-Scale Computational Analysis of Deformation and Fracture in an Al-Si Composite Material Fabricated by Electron Beam Wire-Feed Additive Manufacturing
by Ruslan Balokhonov, Aleksandr Zemlianov, Veronika Utyaganova, Diana Gatiyatullina and Varvara Romanova
Metals 2023, 13(8), 1465; https://doi.org/10.3390/met13081465 - 15 Aug 2023
Viewed by 1037
Abstract
Numerical simulation of deformation and fracture of an AlSi12% alloy additively fabricated by layer-by-layer electron beam melting of a wire is carried out. The microstructure of the alloy is studied by scanning and transmission electron microscopy at different resolutions. The experimental study at [...] Read more.
Numerical simulation of deformation and fracture of an AlSi12% alloy additively fabricated by layer-by-layer electron beam melting of a wire is carried out. The microstructure of the alloy is studied by scanning and transmission electron microscopy at different resolutions. The experimental study at a length scale of several dozens of microns reveals a dendritic structure, which can be treated as a composite material consisting of aluminum arms separated by a eutectic network. The volume fraction of dendrites varies with the distance from the base plate in the build direction. The eutectics can also be thought of as a composite with an aluminum matrix reinforced by silicon particles at a scale of a few microns. Particles of different shapes are nearly equally spaced in the matrix. The eutectic and dendritic structures are taken into account explicitly in the calculations. The dynamic boundary-value problems are solved by ABAQUS/Explicit. The isotropic elastic-plastic and elastic models are used to simulate the response of aluminum and silicon. The fracture model includes a maximum distortion energy criterion formulated for the particle and matrix materials in terms of the equivalent stress and plastic strain. A two-scale approach is proposed to investigate deformation and fracture of the AlSi12% alloy. On the eutectic scale, the thermomechanical behavior of the Al matrix-silicon particle two-phase composite is simulated to obtain the homogenized properties of the eutectic composite material, which is then used at a higher scale to investigate the deformation and fracture of a two-phase dendritic structure. Residual stresses formed during cooling of the additively manufactured material were found to decrease the strength of the composite, while the strength increases with the volume fraction of dendrites. Full article
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20 pages, 13572 KiB  
Article
Effect of Y on Arc Breaking Behavior of Platinum–Iridium Alloy Contact Materials at Different Voltages
by Saibei Wang, Yong Sun, Song Chen, Song Wang, Aikun Li, Yonghua Duan, Youcai Yang, Mingjun Peng, Ming Xie and Bo Li
Metals 2023, 13(8), 1394; https://doi.org/10.3390/met13081394 - 3 Aug 2023
Viewed by 1168
Abstract
The Pt–Ir alloy is an important electrical contact material in the aerospace field, and its electrical contact performance directly affects the reliability and stability of the circuit system. In order to elucidate the effect of Y on the breaking arc behavior of Pt–Ir [...] Read more.
The Pt–Ir alloy is an important electrical contact material in the aerospace field, and its electrical contact performance directly affects the reliability and stability of the circuit system. In order to elucidate the effect of Y on the breaking arc behavior of Pt–Ir alloys at different voltages, Pt-10Ir-1Y and Pt-25Ir-1Y alloys were prepared using melting and thermal processing, and the electrical contact tests were carried out at DC 15 A 12 V, 24 V, and 36 V. When comparing the results of Pt-10Ir and Pt-25Ir electrical contact tests, they showed that Y doping provided a tendency to concentrate individual arc erosion regions. Meanwhile, the comparative study showed that the addition of Y could inhibit the tendency of the Pt–Ir arc time to increase with voltage. At 36 V, the overall arc time of Pt–Ir–Y was significantly lower than that of Pt–Ir, and the fluctuation in arc time and arc energy was reduced. In addition, Y reduced the welding force of Pt–Ir alloys at 12 V, while Y improved the stability of the welding force of Pt–Ir alloys at 24 V. It could be seen that Y was favorable to improving the arc erosion resistance of the Pt–Ir alloy under certain conditions. The contact resistance analysis showed that there was an obvious partitioning phenomenon in the contact resistance of Pt–Ir alloys, and Y changed in this phenomenon at a certain voltage range. In addition, the material transfer direction of the Pt–Ir alloy was from the anode to the cathode, which was not affected by the voltage change, while the addition of Y changed the material transfer direction from the cathode to the anode, which was likely caused by the change from the metal-phase arc dominance to gas-phase arc dominance. Full article
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15 pages, 6642 KiB  
Article
Effect of Annealing Process on Interface Behavior of Al/Zn Laminated Composites
by Renfu Wang, Yonghua Duan, Mingjun Peng, Baipo Shu, Yiren Wang, Mengnie Li, Caiju Li, Shanju Zheng, Huarong Qi and Ruijiao Jia
Metals 2023, 13(4), 748; https://doi.org/10.3390/met13040748 - 12 Apr 2023
Viewed by 1191
Abstract
Laminated metal composites have attracted more attention due to their ultra-high strength, fracture toughness and elongation, full considerations of each component, and coordinated deformation effect between interfaces. Herein, Zn and Al were selected as the component materials to prepare Al/Zn laminated composite plates [...] Read more.
Laminated metal composites have attracted more attention due to their ultra-high strength, fracture toughness and elongation, full considerations of each component, and coordinated deformation effect between interfaces. Herein, Zn and Al were selected as the component materials to prepare Al/Zn laminated composite plates using hot rolling and low temperature annealing, and studied the influence of the thickness of the diffusion layer at the interface to understand the reason for the strengthening and toughening mechanism. The results show that, with an increase in annealing temperature and time, the grain will recover and recrystallize to grow. A diffusion layer with a certain thickness formed at the interface due to the mutual diffusion of Al and Zn atoms at the interface. As annealing time and temperature increase, the yield and tensile strengths first increased and then decreased. The tensile fracture morphology showeds many deep dimples. In the rolling state, the micro-hardness value at the interface was between Al and Zn. Full article
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