A review on the production of metal matrix composites through stir casting – Furnace design, properties, challenges, and research opportunities

This study investigates the production of various reinforced and non-reinforced composite materials using powder metallurgy (PM). It presents the new approach into optimize the mechanical properties of hybrid composites (Al-SiC-B4C) produced with powder extrusion process. A16061 powders are used as the matrix material and B4C and SiC powders are used as the reinforcement materials. Matrix and reinforcement materials are mixed in a three-dimensional mixer. The mixtures are then subjected to cold pressing to form metal block samples. Block samples are subjected to hot extrusion in an extrusion mold after being subjected to a sintering process. This produces samples with a cross-sectional area of 25 × 30 mm2. These extruded samples were subjected to T6 heat treatment. The composite materials produced are examined in terms of density, hardness, transverse rupture strength, tensile strength, and wear resistance. Furthermore, optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy and XRD are performed to examine the microstructure, surface fractures, and surface abrasion. In this study, high density Al6061/B4C/SiC hybrid composite materials were successfully produced. After extrusion, some micro particles were found to crack. The highest hardness occurred in 12%B4C reinforced composites. The lowest hardness was obtained in Al6061 alloy without reinforcement. The highest tensile strength occurred in 12%SiC particle reinforced composite material. The highest wear resistance was obtained for 9%B4C+3%SiC samples due to the hardness of B4C and the good adhesion properties of the matrix and SiC.

Wear and mechanical properties of Al6061/SiC/B4C hybrid composites produced with powder metallurgy

Aluminum metal matrix composites (AMMCs) explicitly show better physical and mechanical properties as compared to aluminum alloys and results in a more preferred material for a wide range of applic...

Investigation on the cutting quality characteristics of abrasive water jet machining of AA6061-B4C-hBN hybrid metal matrix composites

A review on plant fiber reinforced thermoset polymers for structural and frictional composites

The study focuses on fabricating Al7075 metal matrix composites (MMC) with silicon carbide ceramic particles and various other solid lubricants for application in the development of piston. The composition of the casted specimen is 90 wt.% Al7075 alloy as well as 5 wt.% of SiC, which has to be kept as constant, and varying the type of the solid lubricants: graphite, hexagonal boron nitride (hBN), and molybdenum disulfide (MoS2) with 5 wt.%. Hybrid Al7075 composites are successfully fabricated through the stir casting process. The casted specimens are machined for the necessary testing as per the ASTM standards. The mechanical properties like tensile strength, compression strength, and hardness of the fabricated composites are evaluated by conducting experimental tests while the wear properties were evaluated via the pin-on-disc method. The results are compared to assess the best combination of solid lubricants for piston applications. The results indicate that Al7075 with 5 wt.% SiC and 5 wt.% graphite composite outperformed all other hybrid composites by evincing excellent mechanical and tribological properties; this might be due to the synergic effect of graphite with the Al7075 –SiC MMC.

Study on the mechanical and tribological performances of hybrid SiC-Al7075 metal matrix composites

THIS PAPER INVESTIGATES THE MECHANICAL PROPERTIES AND CORROSION 
BEHAVIOR OF METAL MATRIX COMPOSITES PREPARED USING AL7075 ALLOY AS A MATRIX, SILICON CARBIDE AND TITANIUM CARBIDE AS REINFORCEMENT PARTICLES. TWO STEP STIR CASTING PROCESS WAS USED TO FABRICATE THE COMPOSITES BY VARYING VOLUME FRACTIONS OF SILICON CARBIDE AND TITANIUM CARBIDE (0 TO 15 VOL. %). MICROSTRUCTURAL ANALYSIS, MECHANICAL AND CORROSION BEHAVIOR WERE USED TO EVALUATE THE PERFORMANCE OF THE COMPOSITES. UNIFORM DISTRIBUTION OF REINFORCEMENT PARTICLE WAS OBSERVED THROUGH OPTICAL PHOTOMICROGRAPHS. VICKERS MICRO HARDNESS TESTS WERE PERFORMED AND THE HARDNESS VALUES WERE INCREASED WITH AN INCREASE IN REIN-FORCEMENT FROM 0 TO 15 VOL. %. THE TENSILE STRENGTH OF THE 10 VOL. % OF ALUMINUM HYBRID MATRIX COMPOSITE WAS BETTER THAN THAT OF THE BASE ALLOY. IN 3.5% NACL SOLUTION, IT WAS OBSERVED THAT THE 15 VOL. % OF THE ALUMINUM HYBRID MATRIX COMPOSITE HAVE HIGHER CORROSION RE-SISTANCE IN COMPARISON THE BASE ALLOY.

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Mechanical and corrosion behavior of al7075 (hybrid) metal matrix composites by two step stir casting process

This study deals with the investigation on the effect of Electrical Discharge Machining (EDM) parameters during machining of hybrid composite (Al 7075/TiC/B4C). The optimum process parameters of di...

MULTI-OBJECTIVE OPTIMIZATION OF EDM PROCESS PARAMETERS FOR MACHINING OF HYBRID ALUMINUM METAL MATRIX COMPOSITES (Al7075/TiC/B4C) USING GENETIC ALGORITHM

Mechanical and fracture study of hybrid natural fiber reinforced composite – Coir and sugarcane leaf sheath

Effect of shot peening on surface properties of Al7075 hybrid aluminum metal matrix composites

Investigation in this paper is mechanical properties and corrosion properties of Al 7075 metal matrix composites. Al 7075 metal matrix composite is prepared from Al 7075 as a matrix and redmud as a reinforcement by using two step stir casting process. Volume percentage of reinforcement is varied from 0% to 15%. The experimental density of the composite material produced was calculated according to the Archimedes principle, greater than the basic matrix. Uniform distribution of the reinforcement and matrix in the composite is studied by using optical micrographs and microhardness of the composite is measured by using Vickers hardness testing machine. The microhardness of the composite was increased while the reinforcement went from 0% to 15%. The tensile strength of the composite material is raised at 5% of the reinforcement tolerance (326 MPa), which is higher than the base matrix. The Al 7075 metal matrix composites have a lower corrosion rate in a 3.5% NaCl solution than the base matrix. As the volume percentage increase in red mud, was reduced the corrosion rate of the composites.

/pdf/investigacion-sobre-las-propiedades-mecanicas-y-de-corrosion-4yng4yfcuz.pdf

M. Sambathkumar

Papers

Mechanical and corrosion behavior of al7075 (hybrid) metal matrix composites by two step stir casting process

MULTI-OBJECTIVE OPTIMIZATION OF EDM PROCESS PARAMETERS FOR MACHINING OF HYBRID ALUMINUM METAL MATRIX COMPOSITES (Al7075/TiC/B4C) USING GENETIC ALGORITHM

Mechanical and fracture study of hybrid natural fiber reinforced composite – Coir and sugarcane leaf sheath

Effect of shot peening on surface properties of Al7075 hybrid aluminum metal matrix composites

Investigación sobre las propiedades mecánicas y de corrosión del compuesto de matriz metálica Al 7075/Redmud.