Development of in-Situ Al-Si/CuAl2 Metal Matrix Composites: Microstructure, Hardness, and Wear Behavior

Tash, Mahmoud M.; Mahmoud, Essam R. I.

doi:10.3390/ma9060442

Cited by 29 publications

(22 citation statements)

References 16 publications

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“…At sintering temperatures (400–500 °C) or by subsequent heat treatment, the Ag nanoparticles will react with the fcc-Al matrix, producing in situ a metal matrix composite. This process was also described for other systems such as Al-Si/CuAl 2 [ 22 ]. It will ensure that the Ag 2 Al particles will be localized preferentially at the boundaries of former powder particles.…”

Section: Discussionmentioning

confidence: 98%

Phase Transformation Induced Self-Healing Behavior of Al-Ag Alloy

et al. 2018

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Self-healing alloys are promising materials that can decrease the consequences of accidents. To detect crack formation in a material is simple task that can be performed by e.g., sonic or ultrasound detection, but it is not always possible to immediately replace the damaged parts. In this situation, it is very advantageous to have the chance to heal the crack during operation, which can be done e.g., by annealing. In this paper, self-healing behavior was proven by TEM (Transmission electron microscope) observation of crack healing after annealing. The crack was observed in the rapidly solidified Al-30Ag alloy with non-equilibrium phase composition formed by a minor amount of Ag2Al and a supersaturated solid solution of Ag in an fcc-Al matrix (fcc = face centered cubic). After annealing at 450 °C, equilibrium phase composition was obtained by forming a higher amount of Ag2Al. This phase transformation did not allow the crack to be healed. Subsequent annealing at 550 °C caused recrystallization to a supersaturated solid solution of Ag in fcc-Al, followed by a return to the mixture of fcc-Al and Ag2Al by cooling, and this process was accompanied by the closing of the crack. This observation proved the self-healing possibilities of the Ag2Al phase. Practical application of this self-healing behavior could be achieved through the dispersion of fine Ag2Al particles in a structural material, which will enrich the material with self-healing properties.

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Section: Discussionmentioning

confidence: 98%

Phase Transformation Induced Self-Healing Behavior of Al-Ag Alloy

et al. 2018

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“…This bonding causes the dispersed phase to help the matrix to load transfer and/or to avoid the movement of dislocations. 158 Generally, due to a considerable difference between the atomic structure of matrix and dispersed phase, incoherent or semi-coherent interfaces between the phases might be observed. However, depending on the process conditions like temperature and mechanically induced input energy, it is possible to change the quality of interface between the matrix and dispersed phase by formation of a thin reaction layer between a matrix and dispersed phase.…”

Section: Progress In Mmcs Matrix and Reinforcing Materialsmentioning

confidence: 99%

“…The in situ dispersed phases have a clean interface with the matrix with normally a strong chemical and consequently mechanical bonding. This bonding causes the dispersed phase to help the matrix to load transfer and/or to avoid the movement of dislocations 158 …”

Section: Production Routes For Mmcsmentioning

confidence: 99%

Advanced production routes for metal matrix composites

Mussatto

Ahad

Mousavian

et al. 2020

Engineering Reports

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The use of metal matrix composites (MMCs) in a variety of products is significantly increasing with time due to the fact that their properties can be tailored and designed to suit specific applications. However, the future usage of MMC products is very much dependent on their beneficial aspects and hence it is critical to ensure in a robust repeatable manner the superior physical property advantages compared to conventional unreinforced monolithic metal counterparts. Although numerous routes are available for production of MMC products, each of them has their own advantages and disadvantages. This article provides an overview of advanced production routes for MMCs. The discussion also highlights challenges and presents a future prospectus for MMCs. Powder metallurgy and casting routes are still extensively used for production of MMCs. Aluminum alloys are today the most commonly used matrix materials in MMC products.Carbides (eg, SiC, TiC, and B 4 C), carbon allotropes (eg, CNTs and graphene), and alumina (Al 2 O 3) are currently the most used reinforcement materials. Nevertheless, the use of nano and of hybrid reinforcements are seeing increased usage in niche applications. Additive manufacturing (AM) is discussed as a novel production route for MMC products. This process represents a promising method for the production of MMC products.

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“…[5]; (ii) liquid-state processing such as stir casting, squeeze casting, melt-infiltration, spray deposition, etc. [6]; and (iii) in situ processing such as directional solidification of eutectics and formation of intermetallic phases [7]. Hard ceramic particulates such as carbides, oxides, nitrides, and borides have been widely used as reinforcements in AMCs.…”

Section: Introductionmentioning

confidence: 99%

Investigations of the Tribological Performance of A390 Alloy Hybrid Aluminum Matrix Composite

2018

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Several challenges stand in the way of the production of metal matrix composites (MMCs) such as higher processing temperatures, particulate mixing, particulate–matrix interface bonding issues, and the ability to process into desired geometrical shapes. Although there are many studies showing composites with single particulate reinforcements, studies on composites with multiple reinforcing agents (hybrid composites) are found to be limited. Development of a hybrid particulate composite with optimized mechanical and tribological properties is very significant to suit modern engineering applications. In this study, Al–Si hypereutectic alloy (A390) was used as the matrix and silicon carbide (SiC), graphite (Gr), and molybdenum di-sulphide (MoS2) were used as particulates. Particulate volume (wt %) was varied and sample test castings were made using a squeeze casting process through a stir casting processing route. The evaluation of the mechanical testing indicates that the presence of both the hard phase (SiC) and the soft phase had distinct effect on the properties of the hybrid aluminum matrix composites (HAMCs). Composite samples were characterized to understand the performance and to meet the tribological applications. The 3D profilometry of the fractured surfaces revealed poor ductility and scanning electron microscopy fractography study indicated an intra-granular brittle fracture for HAMCs. Also, the dry sliding wear tests indicated that the newly developed HAMCs had better tribological performance compared to that of A390 alloy.

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Development of in-Situ Al-Si/CuAl2 Metal Matrix Composites: Microstructure, Hardness, and Wear Behavior

Cited by 29 publications

References 16 publications

Phase Transformation Induced Self-Healing Behavior of Al-Ag Alloy

Phase Transformation Induced Self-Healing Behavior of Al-Ag Alloy

Advanced production routes for metal matrix composites

Investigations of the Tribological Performance of A390 Alloy Hybrid Aluminum Matrix Composite

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