scispace - formally typeset
Search or ask a question
Proceedings ArticleDOI

Characteristics study on aluminium graphene composite for different sintering approaches

09 Feb 2021-Vol. 2327, Iss: 1, pp 020039
TL;DR: In this paper, the authors analyzed the Al 6061 matrix micro composites with different reinforcement content of Graphene (0.25, 0.50, and 0.80 weight %).
Abstract: Aluminium alloys and its composites are the most important engineering materials, which have been broadly utilized in Automobile and Aviation industries due to its properties like low density and good structural rigidity. Graphene is having the allotropes of carbon which are used as filler and perfect reinforcement for traditional materials used for structural applications.. This research is carried out to analyse the Al 6061 matrix micro composites with different reinforcement content of Graphene (0.25, 0.50, 0.80 weight %). The Ball M illing process is carried out to achieve uniform dispersion of the graphene and the mixtures were prepared by powder metallurgy (PM ). The prepared compacts are sintered by using the box furnace and microwave sintering. Hardness and green density are investigated for different types of sintering and Graphene weight fraction. Experimental results will give the dimension for the preparation of Al – Graphene composites considering the hardness and green density.
Citations
More filters
Journal ArticleDOI
TL;DR: In this paper , the influence of various parameters on the surface wear and hardness of Al6061-based surface composites were investigated and compared for the influences of various FSP tool geometry, reinforcement composition, number of FSP passes, pin load, etc.
Abstract: The friction stir process (FSP) is becoming a highly utilized method to manufacture composites since it refines the microstructure and improves the physical characteristics like hardness, strength, and wear resistance of their surfaces. In this study, the hardness and wear behaviours of Al6061-based surface composites prepared by the FSP were investigated and compared for the influences of various parameters—FSP tool geometry, reinforcement composition, number of FSP passes, pin load, etc. The Taguchi design with an L27 orthogonal array was developed to analyze the influence of five input parameters on the output parameter, i.e., wear rate during wear tests. The hardness of the composite samples for different reinforcement compositions was investigated, and the results were statistically compared with the obtained wear rates. It was concluded from the results that various parameters influenced the surface wear and hardness of the composites. Tool geometries cylindrical pin and square pin had the maximum and minimum wear rates, respectively. Additionally, the optimal composition of the reinforcements copper and graphene as 1:3 possessed the maximum wear rate and minimum hardness. However, the reinforcement composition 3:3 (Cu:Gr) by weight had the minimum wear rate and maximum hardness. The higher the FSP pass numbers, the lesser the wear rate and the higher the hardness, and vice-versa. This work helps identify the influence of numerous factors on the wear and hardness aspects of surface composites prepared by the FSP. In the future, this study can be modified by combining it with thermal analysis, sensor data analysis of the composites, and optimization of the parameters for desirable microstructure and physical properties.
References
More filters
Journal ArticleDOI
TL;DR: In this paper, a 1.0-wt.% graphene reinforced aluminum 6061 (Al6061) composite was synthesized to investigate the effects of graphene dispersion by ball milling technique.
Abstract: A 1.0 wt.% graphene reinforced aluminum 6061 (Al6061) composite was synthesized to investigate the effects of graphene dispersion by ball milling technique. The Al6061 powder and graphene were ball milled at different milling times. The composites were then synthesized by hot compaction in the semi-solid regime of the Al6061. A three point bending test was performed to characterize the mechanical properties of the composite. The ball milled powder and the fracture surfaces of the composites were analyzed using the scanning electron microscopy. A maximum enhancement of 47% in flexural strength was observed when compared with the reference Al6061 processed at the same condition.

340 citations

Journal ArticleDOI
TL;DR: In this article, the microstructural and mechanical properties of Aluminium (Al) Metal Matrix Composites (MMCs) fortified with Zirconium Oxide (ZrO2) and nanographene particles are explored.
Abstract: The present work explores the microstructural and mechanical properties of Aluminium (Al) Metal Matrix Composites (MMCs) fortified with Zirconium Oxide (ZrO2) and nanographene particles. The composite material is processed by the mix fluid metallurgy course. ZrO2 and graphene is blended in various extents in which ZrO2 (1 wt. %) reinforcement is kept steady and graphene support is varied independently with 0.5 and 0.75 wt. %. Utilizing optical and SEM equipment, micro examination is conveyed and results uncover that uniform circulation of ceramic zirconium dioxide (ZrO2) and graphene particles are found in the as cast Al6061 MMCs. Fourier-Transform Infrared Spectroscopy (FTIR) investigation is done to know the quality and measure of fortification present in composites and notes the energy gap (Eg) obtained as 4.05 eV. Mechanical tests according to ASTM standards were led on the composites viz., tensile strength, yield strength and % elongation to check the properties of Al based MMCs. The consequence of this work is reasoned with a noteworthy improvement in tensile and yield strength values of the processed composites however, the percentage elongation diminishes with the addition of reinforcement content in the fabricated composite.

59 citations

Journal ArticleDOI
16 Mar 2018-JOM
TL;DR: In this paper, a review summarizes the different methods available to synthesize Gr-Al matrix nanocomposites and the resulting properties achieved in these NCs, and the effect of processing parameters on the realized properties opens up the possibility of tailoring the synthesis methods to achieve the desired properties for a given application.
Abstract: Graphene-reinforced aluminum (Gr-Al) matrix nanocomposites (NCs) have attracted strong interest from both research and industry in high-performance weight-sensitive applications. Due to the vastly different bonding characteristics of the Al matrix (metallic) and graphene (in-plane covalent + inter-plane van der Waals), the graphene phase has a general tendency to agglomerate and phase separate in the metal matrix, which is detrimental for the mechanical and chemical properties of the composite. Thus, synthesis of Gr-Al NCs is extremely challenging. This review summarizes the different methods available to synthesize Gr-Al NCs and the resulting properties achieved in these NCs. Understanding the effect of processing parameters on the realized properties opens up the possibility of tailoring the synthesis methods to achieve the desired properties for a given application.

46 citations

Journal ArticleDOI
TL;DR: In this paper, the fatigue and wear behavior of Al6061-Graphene (varying weight fraction 0.2, 0.4 and 0.6) particulate composite are investigated in comparison with monolithic alloy.
Abstract: Graphene being one of the allotropes of carbon, has attracted and evoked keen interest in recent times as an ideal reinforcement for the composites due its outstanding strength. In the current research work, the fatigue and wear behavior of Al6061–Graphene (varying weight fraction 0.2, 0.4, 0.6 wt%) particulate composite are investigated in comparison with monolithic alloy. Initially dispersion of Graphene is carried out by ultra-sonication followed by ball milling on adding Al6061 alloy powder, consolidated by powder metallurgy process and subjected to sintering under inert gas atmosphere. The investigation on the effect of Graphene flakes on micro hardness, mass loss, coefficient of friction and surface roughness values are done under different loading conditions for the prepared samples and wear tracks are analyzed under a microscope. The possible reasons for crack initiation and subsequent fatigue failure under cyclic loading with stress ratio R = −1(sinusoidal waveform), cyclic frequency 5 Hz and stress amplitude 40–140 MPa at room temperature conditions and the type of wear due to increase in Graphene weight fractions were studied through tests results and SEM characterizations.

38 citations

Journal ArticleDOI
30 Apr 2019-Wear
TL;DR: In this paper, the authors investigate the wear performance of hybrid composites with Al-6061 alloy-based hybrid composite with Al2O3, SiC and CeO2 as reinforcement.

26 citations