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Influence of Multiwalled Carbon Nanotubes on the Aging Behavior of AA 6061 Alloy Matrix Nanocomposites |
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| Authors: | H R Aniruddha Ram Praveennath G Koppad K T Kashyap |
| Affiliation: | 1. Department of Mechanical Engineering, Center for Nanocomposites Research, PES Institute of Technology, Bangalore, 560 085, India 2. Department of Mechanical Engineering, Jyothy Institute of Technology, Tataguni, Bangalore, 560 062, India 3. Research and Development, Rapsri Engineering Products Company Ltd., Subramanyapura Post, Bangalore, 560 061, India |
| Abstract: | The effect of multiwalled carbon nanotubes (MWCNT) with varying volume fractions on aging behavior of aluminium alloy 6061 matrix nanocomposites (MWCNTs/AA 6061) has been studied. The aging behavior of the developed nanocomposites has been evaluated at a temperature of 170 °C for different time intervals by means of Vickers hardness. Increase in the peak hardness by 32 and 27 % was observed by the addition of 2 wt% copper coated and uncoated MWCNTs for the aging time of 40 and 43 min as compared to base alloy with the peak hardness of 107 for the aging time of 55 min. The dramatic increase in the peak hardness of the nanocomposite within a short span of aging time is due to the generation of dislocations due to the difference in the co-efficient of thermal expansion between the AA6061 matrix and MWCNTs. |
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