Creep behavior of A356 aluminum alloy reinforced with multi-walled carbon nanotubes by stir casting

Shan, L. and Tan, Chou Yong and Shen, X. and Ramesh, S. and Kolahchi, R. and Hajmohammad, M. H. and Rajak, D. K. (2022) Creep behavior of A356 aluminum alloy reinforced with multi-walled carbon nanotubes by stir casting. Materials, 15 (24). ISSN 1996-1944, DOI

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Lightweight aluminum alloy components are often used to manufacture a variety of engineering components in many industries. In recent years, researchers have studied the effect of improving the mechanical properties of metal alloys by incorporating nano-carbon into its structure. In this study, the effect of the addition of 0.2, 0.5, and 1 wt% of multi-walled carbon nanotubes (MWCNTs) on the stress-strain behavior and creep phenomenon of an A356 aluminum alloy were studied. The effect of nickel coating on 0.2 wt% MWCNTs was also investigated. Samples were prepared using the stir-casting method. The results revealed that the grain size became finer when MWCNT nano-particulates were introduced. Although the MWCNTs were distributed homogeneously in the A356 matrix, as confirmed by FESEM analysis, there were some agglomerations observed in a specific area with dimensions smaller than 100 nm. Nevertheless, the addition of MWCNTs was found to be beneficial in enhancing the hardness of alloys containing 0.2 wt%, 0.2 wt% nickel-coated, 0.5 wt%, and 1 wt% MWCNTs by 9%, 24%, 32%, and 15%, respectively, as compared with the unreinforced A345 matrix. It was also found that the 0.5 wt% MWCNT-A356 matrix exhibited an improvement in the creep lifetime by more than two orders of magnitude.

Item Type: Article
Funders: SATU Grant (Grant No: ST036-2021 & IF 045-2021)
Uncontrolled Keywords: Aluminum alloy; Stir casting; Nanocomposites; MWCNTs; Creep
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 15 Nov 2023 06:13
Last Modified: 15 Nov 2023 06:13

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