Metal Matrix Composites: Aluminum

Abstract

Metal matrix composites in general consist of at least two chemically and physically dissimilar phases, which are distributed so as to provide properties not obtainable by either of the individual phases. In aluminum matrix composites, the matrix is mainly aluminum or aluminum alloy, in which some continuous fibrous materials such as Al 2 O 3 or particulates such as SiC are reinforced. Since aluminum alloys have low density, excellent strength, toughness, and corrosion resistance, they have been considered extensively in the aerospace and automotive applications. The article details the classification, processing, salient properties, and applications of the aluminum matrix composites.

Energy absorption capacity of pseudoelastic fiber-reinforced composites

“…The resulting composites had a total thickness of 0.9 mm with about 30% fiber volume fraction. Immediately after diffusion bonding in the heated press, composite plates were quenched in water at 20°C or 80°C and then heat treated at 170°C for 480 min in order to promote precipitation hardening [20]. The purpose of quenching is to control precipitation (in the follow-up heat treatment) of brittle intermetallic compounds to ensure good dispersion strengthening.…”

Microstructural and Mechanical Characterization of the Dissimilar AA7075 and AA2024 Aluminum Alloys Reinforced with Different Carbide Particles Welded by Friction Stir Welding

“…Dissimilar aluminum composites are fabricated through the amalgamation of two or more distinct varieties of aluminum alloys. Various alloys can be selected to enhance the characteristics of the composite, including, but not limited to, strength, stiffness, and corrosion resistance [3][4][5]. The mechanical characteristics of dissimilar aluminum composites produced using FSW are influenced by many parameters: the selection of aluminum alloys, the manipulation of processing parameters (e.g., tool rotation speed, welding speed, and plunge depth), and the characterization of the resulting microstructure in the composite material [6][7][8][9].…”

Interaction of Boron Nitride Nanotubes with Aluminum: A Computational Study

“…In these composites the reinforcing material, usually a carbon fiber, is integrated into the metal matrix. This enhances the overall strength and/or stiffness of the MMC, known also as CMMCs (carbon fiber MMCs).…”

“…Nanotube–MMCs are an emerging class of new materials being developed to take advantage of the high tensile strength and low density of the nanotubes as a nanofiber reinforcing material. Today’s nanotube–MMCs exclusively use carbon nanotubes (CNTs), due to their relative ease of production and long history of research. − A variety of metals are used as a metallic matrix in CNT-MMCs, including Al, Cu, Mg, Ni, Ti, Ag, Sn, and some alloys, such as W–Cu–CNT . The major challenges of CNT-MMCs are related to corrosion and formation of metallic carbides, due to galvanic corrosion and poor CNT thermal stability .…”