Microstructure and Mechanical Characterization of Al2O3/Graphene Reinforced Al6061 Based Hybrid Nanocomposites

Sourabh Kumar Soni; Daksh Ganatra; Parth Mendiratta; CH. S. K. Akhilesh Reddy; Benedict Thomas

doi:10.1007/s12540-021-01103-6

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자료유형: 학술저널

저자정보: Sourabh Kumar Soni (Vellore Institute of Technology) Daksh Ganatra (Vellore Institute of Technology) Parth Mendiratta (Vellore Institute of Technology Vellore) CH. S. K. Akhilesh Reddy (Vellore Institute of Technology Vellore) Benedict Thomas (Vellore Institute of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International 제27권 제2호

발행연도: 2022.2

수록면: 545 - 555 (11page)

DOI: 10.1007/s12540-021-01103-6

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The present work deals with the microstructure and mechanical characterization of the Al6061 based nanocomposites (2wt% Graphene and 2 wt% Al2O3)and hybrid nanocomposites (2 wt% Al2O3with 0.5, 1, 1.5, 2 and 2.5 wt% of Graphene)processed through ultrasonic-assisted melt-stirring technique. The combined effort of reinforcement processing (ball-milling)and ultrasonic-assisted melt stirring approach has been adopted for fabricating hybrid nanocomposites with uniformly dispersedceramic nanoparticles and carbon nanomaterial. The grain structure, physical properties, fractured surfaces, microhardness,hardness, ultimate tensile strength (UTS), flexural and compressive strength of the Al6061, Al6061-based nanocompositesand hybrid nanocomposites were examined to understand the influence of ceramic and nanomaterial particleson the microstructure and mechanical characteristics of the fabricated specimens. Microstructure investigation employingoptical microscopy (OM) images and scanning electron microscopy (SEM) revealed homogenous dispersal of nano-sizedAl2O3and Graphene particles in the prepared hybrid nanocomposite specimens. The mechanical properties of the hybridnanocomposites enhance with the increase of graphene nanoparticles (up to 1 wt%) in the nanocomposite. The mechanicalcharacteristics of the hybrid nanocomposites exhibited a decreasing trend with an increase in Graphene up to 2 wt%, and anincreasing trend is observed with a further increase in Graphene after 2.5 wt%. Al6061-2 wt% Al2O3-1 wt% Graphene hybridnanocomposite depicts enhancement in compressive strength, UTS, flexural strength, hardness and microhardness of about105.55%, 171.70%, 37.86%, 71.11% and 34.78%, respectively as compared to casted Al6061 specimen.

#Hybrid nanocomposites · Alumina · Graphene · Reinforcement pre-dispersion · Mechanical characterization · Microstructure investigation

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