Effect of MWCNT reinforcement on the precipitation-hardening behavior of AA2219

Shijo Thomas; Umasankar V.

doi:10.1007/s12613-018-1546-2

Volume 25 Issue 1

Jan. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(1): 53-61

Shijo Thomas and Umasankar V., Effect of MWCNT reinforcement on the precipitation-hardening behavior of AA2219, Int. J. Miner. Metall. Mater., 25(2018), No. 1, pp. 53-61. https://doi.org/10.1007/s12613-018-1546-2

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Shijo Thomas and Umasankar V., Effect of MWCNT reinforcement on the precipitation-hardening behavior of AA2219, Int. J. Miner. Metall. Mater., 25(2018), No. 1, pp. 53-61. https://doi.org/10.1007/s12613-018-1546-2

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Research Article

Effect of MWCNT reinforcement on the precipitation-hardening behavior of AA2219

Shijo Thomas and
Umasankar V.

+ Author Affiliations

Corresponding author:
Shijo Thomas E-mail: shijo.thomas3@gmail.com
Received: 11 April 2017; Revised: 6 July 2017; Accepted: 16 July 2017

Abstract

Abstract

Aluminum alloy matrix composites have found a predominant place in research, and their applications are explored in almost all industries. The aerospace industry has been using precipitation-hardenable alloys in structural applications. However, insufficient literature is available on the influence of multiwalled carbon nanotubes (MWCNTs) on precipitation-hardenable alloy composite materials; thus, this work was designed to elucidate the effect on MWCNT reinforcement on AA2219 with and without precipitation hardening. Reinforcement with MWCNTs has been reported to accelerate precipitation and to achieve greater hardness within a much shorter time. The addition of 0.75wt% MWCNTs resulted in maximal hardness at 90 min, which is approximately 27% of improvement over the maximum hardness achieved by the corresponding monolithic alloy after 10 h of aging. The sample reinforced with 0.75wt% MWCNTs showed an improvement of 82% in hardness by solutionizing and aging compared to that achieved by sintering.
- aluminum metal-matrix composites;
- multi walled carbon nanotubes (MWCNT);
- powder metallurgy;
- heat treatment;
- precipitation hardening

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References

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