The effects of volume percent and aspect ratio of carbon fiber on fracture toughness of reinforced aluminum matrix composites

Naji, Hassane; Zebarjad, Seyed Mojtaba; Sajjadi, Seyed Abdolkarim

doi:10.1016/j.msea.2007.09.030

Cited by 88 publications

(35 citation statements)

References 7 publications

(7 reference statements)

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“…Short carbon fiber might be cracked undesirably under intensive shearing load in the thixomixing process. The optimum length for short carbon fiber must be kept throughout the whole process of manufacturing [31]. Fig.…”

Section: Fracture Behaviormentioning

confidence: 99%

Microstructure and properties of aluminum silicon/short fibre carbon composites fabricated by semi-solid thixomixing

2015

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A novel method was developed, based on thixotropic nature of semi-solid slurry of aluminum silicon alloy, for the effective dispersion and distribution of short carbon fibers (C sf ) under intensive shear stress (τ) into the eutectic without physical or chemical damage.The C sf were distributed homogeneously into the matrix at optimum conditions: a temperature of 576-580 °C, around 48% of solid fraction, and rotation speed of mixing was at 100 rpm. The gas entrapment and porosity was a challenge in the fabrication the aluminum composite by thixomixing, and its size increased when the samples were heat treated. The extruded and heat treated composites had around 24% improvement of mechanical strength as assessed by tensile tests. The predominant deposition of silicon and its intermetallics at the interfacial region improved the wettability and adherence to achieve good mechanical properties. The formation of some intermetallics can be helpful to overcome low wettability effects and their structural evolutions were impressive. The fractography analysis illustrated the ductile fracture with some plastic deformation as the results of dimples and some fiber pull-out in the fractured surface. Ultra-micro hardness evaluation showed good interfacial bonding after heat treatment. The thixomixing process can be developed to produce various composites with different reinforcement.

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Section: Fracture Behaviormentioning

confidence: 99%

Microstructure and properties of aluminum silicon/short fibre carbon composites fabricated by semi-solid thixomixing

2015

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“…However, there are still some researchers trying to fabricate short carbon fibers/Al composites by stir casting. Naji et al [76] used stir casting to fabricate short carbon fibers/Al composites to study the effect of volume fraction and aspect ratio of carbon fibers on fracture toughness of the composites. Bhav et al [38] used copper-coated short carbon fibers to fabricate aluminum composites by stir casting and get a strength improvement of 40% by adding 4 wt% carbon fibers.…”

Section: Stir Castingmentioning

confidence: 99%

Carbon Materials Reinforced Aluminum Composites: A Review

Huang

Ouyang

Zhang

et al. 2014

Acta Metall. Sin. (Engl. Lett.)

104

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Carbon materials, including carbon fibers, graphite, diamond, carbon foams, carbon nanotubes, and graphene, are attractive reinforcements for aluminum matrix composites due to their excellent mechanical and/or physical properties as well as light weight. Carbon materials reinforced aluminum (C/Al) composites are promising materials in many areas such as aerospace, thermal management, and automobile. However, there are still some challenging problems that need to be resolved, such as interfacial reactions, low wettability, and anisotropic properties. These problems have limited the use of these composites. This review mainly focuses on the categories, fabrication processes, existing problems and solutions, coatings and interfaces, challenges and opportunities of C/Al composites so as to provide a useful reference for future research.

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“…The crack deflection not only depends on reinforcement volume fraction but also its deviation from center line strictly is dictated by aspect ratio. 19) The fiber reinforcement plays like a barrier, resulting fracture energy increases. 20) The debonding between TiB particles and matrix occur by the stress concentration to TiB particles, and the shearing of TiB particles easily occur.…”

Section: Reinforcementmentioning

confidence: 99%

The Effect of Heat Treatment on Microstructure and Fracture Toughness of In Situ Synthesized (TiB+La2O3)/Ti Composite

Wang

Qin

et al. 2011

Mater. Trans.

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The effects of and TRIPLEX heat treatment on the microstructure, tensile properties and fracture toughness of in situ synthesized (TiB+La 2 O 3 )/Ti composite were studied. TRIPLEX heat treatment was beta solution plus alpha-beta annealing plus aging. The microstructure of materials after and TRIPLEX heat treatment was widmanstätten. Compared with heat treatment, the length of laminar after TRIPLEX heat treatment was longer, the þ colony width was thinner. The width of laminar after TRIPLEX heat treatment followed by oil quenching was coarser than that after water quenching. Compared with heat treatment, the ductility of specimens after TRIPLEX heat treatment (oil and water quenching) was improved significantly. The fracture toughness of composite treated by TRIPLEX heat treatment was better than those by heat treatment. The composites after TRIPLEX heat treatment (oil quenching), had the best tensile properties and fracture toughness.

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The effects of volume percent and aspect ratio of carbon fiber on fracture toughness of reinforced aluminum matrix composites

Cited by 88 publications

References 7 publications

Microstructure and properties of aluminum silicon/short fibre carbon composites fabricated by semi-solid thixomixing

Microstructure and properties of aluminum silicon/short fibre carbon composites fabricated by semi-solid thixomixing

Carbon Materials Reinforced Aluminum Composites: A Review

The Effect of Heat Treatment on Microstructure and Fracture Toughness of <I>In Situ</I> Synthesized (TiB+La<SUB>2</SUB>O<SUB>3</SUB>)/Ti Composite

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