Effect of Heat Treatment on Al2024 Reinforcement With Multiwalled Carbon Nanotube
Journal Title: International Journal of Metallurgical & Materials Science and Engineering (IJMMSE) - Year 2018, Vol 8, Issue 1
Abstract
In this research paper, Multiwalled carbon nanotubes (MWCNTs) reinforced with Al2024 were ball milled for homogenization of powder. Nanocomposite was developed using MWCNT reinforcement having 0.5%, 1.5%, and 2.5% weight percentage mixed with Al2024 by powder metallurgy technique. Samples were compacted using a hydraulic press and sintered. Further, sintered samples were solutionized by heating at 560ยบ C followed by quenching and ageing, to explore the enhancement of properties. Experimental findings reveal that there is an improvement in micro hardness of the composite from 27 HV to 45 HV with increasing in hardness of 66.66% in case of a sintered composite, whereas tensile strength increases from 81.312 MPa to 131 MPa indicating the increase in strength up to 61.09%. Sintered-heat treated composites showed the improvement in micro hardness of 31 HV to 56 HV. Additional improvement of hardness and tensile strength recorded was 13.98% and 17.78% respectively for sintered-heat treated composites. Density decreases with an increase in the addition of MWCNT and porosity increases with increase in percentage reinforcement for both the sintered and sintered-heat treated composites. SEM and XRD images exhibited the presence of uniformly dispersed MWCNT with the Al2024 matrix.TEM images revealed that composite strength has been increased due to the entangled unbroken clusters of the nanotubes
Authors and Affiliations
SHADAKSHARI R, NIRANJAN H B, PAKKIRAPPA H
Keywords
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- EP ID EP281626
- DOI 10.24247/ijmmsefeb20182
- Views 131
- Downloads 0
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