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Evaluation of microstructure and mechanical properties of aluminium (Al6061)-carbon nanotube (CNT)/coconut shell ash (CSA) composites

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Abstract

In this study, a double stir casting technique of fabricating composites consisting of aluminum 6061 (Al6061), carbon nanotubes (CNTs) and coconut shell ash (CSA) was developed by initially mixing molten aluminum with 0.2wt% CNT, followed by CSA (2%, 4% and 8%) in a CNT-Al6061 matrix. The objective was to evaluate the density of the material, microhardness, tensile and compressive strength properties. The study investigated the composition of the composites, the distribution of the reinforcing elements, strengths of the composites fabricated. The microstructure of the composite variants was then evaluated and compared with Al 6061 − 0.2%CNT. The density of the Al6061-0.2% CNT-8% CSA composite is 2.546 g/cm3, which is slightly lower than that of the Al6061-0.2%CNT composite. In terms of hardness, tensile strength and compressive strength, the Al6061-0.2% CNT-6% CSA composite showed a remarkable increase of 59.04%, 62.36%, and 47.68%, respectively. Nevertheless, the incorporation of 8% CSA led to a reduction in hardness by 4.22%, tensile strength by 11.79%, and compressive strength by 11.67% when compared to the hybrid composite containing 6% CSA.

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Authors and Affiliations

  1. Department of Mechanical Engineering, CMR Institute of Technology, Bengaluru Visvesvaraya Technological University, Belagavi, Karnataka, India

    Prashant S. Hatti & Smruti Rekha Swain

  2. Department of Mechanical Engineering, Atria Institute of Technology, Bengaluru, Visvesvaraya Technological University, Belagavi, India

    K. Narasimha Murthy

  3. Department of Mechanical Engineering, Sai Vidya Institute of Technology, Bengaluru, Visvesvaraya Technological University, Belagavi, India

    S. Raghavendra

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  1. Prashant S. Hatti
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  2. K. Narasimha Murthy
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  3. S. Raghavendra
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  4. Smruti Rekha Swain
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Contributions

Raghavendra S - Material SelectionK. Narasimha Murthy - Literature and MethodologyPrashant S. Hatti - ExperimentationSmruti Rekha Swain - Results Interpretation.

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Correspondence to Prashant S. Hatti.

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Hatti, P.S., Murthy, K.N., Raghavendra, S. et al. Evaluation of microstructure and mechanical properties of aluminium (Al6061)-carbon nanotube (CNT)/coconut shell ash (CSA) composites. Interactions 245, 89 (2024). https://doi.org/10.1007/s10751-024-01926-w

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