Synthesis of aluminum alloy 7075-graphite composites by milling processes and hot extrusion

Deaquino-Lara, R.; Estrada-Guel, I.; Hinojosa-Ruiz, G.; Flores-Campos, R.; Herrera‐Ramírez, J.M.; Martínez-Sánchez, R.

doi:10.1016/j.jallcom.2010.11.183

Cited by 34 publications

(11 citation statements)

References 13 publications

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“…Graphene attracted many researchers owing to its outstanding mechanical, thermal and electric properties. [12][13][14][15]. Graphene incorporation into aluminum matrix reports in enhancement of hardness, and tensile strength [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Tensile Properties and Hardness Behavior of Al7075 Matrix Composites Reinforced With Graphene Nanoplatelets And Beryl Fabricated by Stir Casting Method

Patil,

Haneef

2019

IJEAT

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In this research, an effort is made to familiarize and best potentials of the reinforcing agent in aluminum 7075 matrices with naturally occurring Beryl (Be) and Graphene (Gr) to develop a new hybrid composite material. A stir casting technique was adopted to synthesize the hybrid nanocomposites. GNPS were added in volume fractions of 0.5wt%, 1wt%, 1.5wt%, and 2wt% and with a fixed volume fraction of 6 wt.% of Beryl. As cast hybrid composites were microstructurally characterized with scanning electron microscopy and X-ray diffraction. Microstructure study through scanning electron microscope demonstrated that the homogeneous distribution reinforcement Beryl and GNPs into the Al7075 matrix. Brinell hardness and tensile strength of synthesized materials were investigated. The hybrid Al7075-Beryl-GNPs composites showed better mechanical properties compared with base Al7075 matrix material. The ascast Al7075-6wt.% Beryl-2wt.%GNPs showed 49.41% improvement in hardness and 77.09% enhancement in ultimate tensile strength over Al7075 alloy.

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Section: Introductionmentioning

confidence: 99%

Microstructure, Tensile Properties and Hardness Behavior of Al7075 Matrix Composites Reinforced With Graphene Nanoplatelets And Beryl Fabricated by Stir Casting Method

Patil,

Haneef

2019

IJEAT

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“…Aluminum alloy 7075, the most common alloy of this series, provides a good combination of strength, ductility, and toughness [11]. However aluminum alloys have limited tribological applications due to their low wear resistance under lubricating conditions.…”

Section: Introductionmentioning

confidence: 99%

Production and Characterization of AA7075-Graphite Composite Using Friction Stir Processing

Awad

Seleman

Ahmed

et al. 2018

Journal of Petroleum and Mining Engineering

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AA 7075 Aluminum alloy has been received a special attention in aerospace and transportation industries because it provides a good combination of strength, ductility, and toughness. In this study, friction stir processing (FSP) technique is used to produce a self-lubricating AA7075/graphite composite. The composite was produced at different rotating speeds of 400, 800, and 1200 rpm with a constant traveling speed of 50 mm/min and 3⁰ tilt angle applied for one and two passes for each condition. Optical microscopy (OM), and scanning electron microscopy (SEM) were used to investigate microstructure. Vickers hardness and wear testing were conducted to the composite specimens. It was obtained that the dispersion of graphite particles in the AA7075 Al alloy enhanced by increasing both rotating speed and number of passes. The produced AA7075/graphite composite showed higher hardness and wear resistance than the AA7075 base alloy. The highest hardness value (156.2 Hv) was gained for the produced AA7075/graphite composite at 800 rpm rotating speed after FSP second pass comparing to base metal (79 Hv). Whereas, the higher wear resistance value was obtained for the processed composite at 800 rpm after the FSP first pass.

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“…Currently, several ceramic reinforcement particles such as SiC, B 4 C, AlN, Al 2 O 3 , SiO 2 , TiC, TiB 2 , and graphite are used to fabricate MMCs ( Ref 1,2). Among these, graphite has been recognized as a high strength and low density material, thus providing engineers with cost-effective Al-Graphite composites used in automotive components like bushes and bearings (Ref 3).…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-Assisted Synthesis of Graphite-Reinforced Al Matrix Nanocomposites

Roshini

Nagasivamuni

Raj

et al. 2015

J. of Materi Eng and Perform

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A novel approach to produce Al-2 vol.% graphite nanocomposites using micron-sized graphite particles has been reported using conventional stir casting technique combined with ultrasonic treatment. Microstructural observations indicate that the visible agglomerations and porosities are significantly reduced after ultrasonic treatment. Transmission electron microscopy studies of ultrasonic-treated composites reveal that the size of the graphite particles is reduced substantially and its morphology is transformed into flake type structures. The width of the graphite flakes is reduced markedly with the increase in ultrasonic processing time and it is found to be in the range of 100-120 nm with an aspect ratio of 8.83 after 5 min of ultrasonication. Added to that, considerable improvement in the hardness values are noted for ultrasonic-treated Al-2 vol.% graphite composites when compared to conventional untreated composites. The mechanism behind the significant reduction in graphite particle size and porosity, uniform distribution of graphite particles and hardness increments are discussed.

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Synthesis of aluminum alloy 7075-graphite composites by milling processes and hot extrusion

Cited by 34 publications

References 13 publications

Microstructure, Tensile Properties and Hardness Behavior of Al7075 Matrix Composites Reinforced With Graphene Nanoplatelets And Beryl Fabricated by Stir Casting Method

Microstructure, Tensile Properties and Hardness Behavior of Al7075 Matrix Composites Reinforced With Graphene Nanoplatelets And Beryl Fabricated by Stir Casting Method

Production and Characterization of AA7075-Graphite Composite Using Friction Stir Processing

Ultrasonic-Assisted Synthesis of Graphite-Reinforced Al Matrix Nanocomposites

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